diff --git a/headphone-amp-cache.lib b/headphone-amp-cache.lib
index f3ec79e..b9b7727 100644
--- a/headphone-amp-cache.lib
+++ b/headphone-amp-cache.lib
@@ -78,6 +78,30 @@ X ~ 2 0 -150 110 U 50 50 1 1 P
 ENDDRAW
 ENDDEF
 #
+# CONN_01X03
+#
+DEF CONN_01X03 J 0 40 Y N 1 F N
+F0 "J" 0 200 50 H V C CNN
+F1 "CONN_01X03" 100 0 50 V V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Pin_Header_Straight_1X*
+ Pin_Header_Angled_1X*
+ Socket_Strip_Straight_1X*
+ Socket_Strip_Angled_1X*
+$ENDFPLIST
+DRAW
+S -50 -95 10 -105 0 1 0 N
+S -50 5 10 -5 0 1 0 N
+S -50 105 10 95 0 1 0 N
+S -50 150 50 -150 0 1 0 N
+X P1 1 -200 100 150 R 50 50 1 1 P
+X P2 2 -200 0 150 R 50 50 1 1 P
+X P3 3 -200 -100 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
 # CP
 #
 DEF CP C 0 10 N Y 1 F N
@@ -122,6 +146,29 @@ X 2 2 150 0 50 L 50 50 1 1 P
 ENDDRAW
 ENDDEF
 #
+# D_Schottky
+#
+DEF D_Schottky D 0 40 N N 1 F N
+F0 "D" 0 100 50 H V C CNN
+F1 "D_Schottky" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ TO-???*
+ *SingleDiode
+ *_Diode_*
+ *SingleDiode*
+ D_*
+$ENDFPLIST
+DRAW
+P 2 0 1 0 50 0 -50 0 N
+P 4 0 1 8 50 50 50 -50 -50 0 50 50 N
+P 6 0 1 8 -75 25 -75 50 -50 50 -50 -50 -25 -50 -25 -25 N
+X K 1 -150 0 100 R 50 50 1 1 P
+X A 2 150 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
 # Earth
 #
 DEF ~Earth #PWR 0 0 Y Y 1 F P
diff --git a/headphone-amp.sch b/headphone-amp.sch
index f717f23..bbdf25b 100644
--- a/headphone-amp.sch
+++ b/headphone-amp.sch
@@ -49,10 +49,10 @@ Comment3 ""
 Comment4 ""
 $EndDescr
 $Comp
-L USB_B J?
+L USB_B J1
 U 1 1 5930505F
 P 950 1200
-F 0 "J?" H 750 1650 50  0000 L CNN
+F 0 "J1" H 750 1650 50  0000 L CNN
 F 1 "USB_B" H 750 1550 50  0000 L CNN
 F 2 "" H 1100 1150 50  0001 C CNN
 F 3 "" H 1100 1150 50  0001 C CNN
@@ -60,10 +60,10 @@ F 3 "" H 1100 1150 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR01
 U 1 1 59305203
 P 950 1750
-F 0 "#PWR?" H 950 1500 50  0001 C CNN
+F 0 "#PWR01" H 950 1500 50  0001 C CNN
 F 1 "Earth" H 950 1600 50  0001 C CNN
 F 2 "" H 950 1750 50  0001 C CNN
 F 3 "" H 950 1750 50  0001 C CNN
@@ -71,10 +71,10 @@ F 3 "" H 950 1750 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR02
 U 1 1 59305218
 P 850 1750
-F 0 "#PWR?" H 850 1500 50  0001 C CNN
+F 0 "#PWR02" H 850 1500 50  0001 C CNN
 F 1 "Earth" H 850 1600 50  0001 C CNN
 F 2 "" H 850 1750 50  0001 C CNN
 F 3 "" H 850 1750 50  0001 C CNN
@@ -88,10 +88,10 @@ D-
 Text Notes 800  1950 0    60   ~ 0
 Earth
 $Comp
-L SIM2-XXXXD U?
+L SIM2-XXXXD U2
 U 1 1 5930537C
 P 2700 900
-F 0 "U?" H 3400 950 60  0000 C CNN
+F 0 "U2" H 3400 950 60  0000 C CNN
 F 1 "SIM2-XXXXD" H 3000 950 60  0000 C CNN
 F 2 "" H 2700 900 60  0001 C CNN
 F 3 "" H 2700 900 60  0001 C CNN
@@ -99,10 +99,10 @@ F 3 "" H 2700 900 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L +12V #PWR?
+L +12V #PWR03
 U 1 1 5930547F
 P 4850 650
-F 0 "#PWR?" H 4850 500 50  0001 C CNN
+F 0 "#PWR03" H 4850 500 50  0001 C CNN
 F 1 "+12V" H 4850 790 50  0000 C CNN
 F 2 "" H 4850 650 50  0001 C CNN
 F 3 "" H 4850 650 50  0001 C CNN
@@ -110,10 +110,10 @@ F 3 "" H 4850 650 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L -12V #PWR?
+L -12V #PWR31
 U 1 1 59305497
 P 4850 1450
-F 0 "#PWR?" H 4850 1550 50  0001 C CNN
+F 0 "#PWR31" H 4850 1550 50  0001 C CNN
 F 1 "-12V" H 4850 1600 50  0000 C CNN
 F 2 "" H 4850 1450 50  0001 C CNN
 F 3 "" H 4850 1450 50  0001 C CNN
@@ -121,10 +121,10 @@ F 3 "" H 4850 1450 50  0001 C CNN
 	-1   0    0    1   
 $EndComp
 $Comp
-L L_Small L?
+L L_Small L2
 U 1 1 593054EF
 P 2000 1000
-F 0 "L?" H 2030 1040 50  0000 L CNN
+F 0 "L2" H 2030 1040 50  0000 L CNN
 F 1 "20u" H 2030 960 50  0000 L CNN
 F 2 "" H 2000 1000 50  0001 C CNN
 F 3 "" H 2000 1000 50  0001 C CNN
@@ -132,43 +132,43 @@ F 3 "" H 2000 1000 50  0001 C CNN
 	0    -1   -1   0   
 $EndComp
 $Comp
-L C C?
+L C C3
 U 1 1 59305590
 P 1700 1200
-F 0 "C?" H 1725 1300 50  0000 L CNN
+F 0 "C3" H 1725 1300 50  0000 L CNN
 F 1 "200n" H 1725 1100 50  0000 L CNN
-F 2 "" H 1738 1050 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 1738 1050 50  0001 C CNN
 F 3 "" H 1700 1200 50  0001 C CNN
 	1    1700 1200
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C10
 U 1 1 593055F7
 P 2150 1200
-F 0 "C?" H 2175 1300 50  0000 L CNN
+F 0 "C10" H 2175 1300 50  0000 L CNN
 F 1 "100u" H 2175 1100 50  0000 L CNN
-F 2 "" H 2188 1050 50  0001 C CNN
+F 2 "Capacitors_SMD:c_elec_6.3x5.3" H 2188 1050 50  0001 C CNN
 F 3 "" H 2150 1200 50  0001 C CNN
 	1    2150 1200
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C11
 U 1 1 5930565F
 P 2350 1200
-F 0 "C?" H 2375 1300 50  0000 L CNN
+F 0 "C11" H 2375 1300 50  0000 L CNN
 F 1 "100n" H 2375 1100 50  0000 L CNN
-F 2 "" H 2388 1050 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2388 1050 50  0001 C CNN
 F 3 "" H 2350 1200 50  0001 C CNN
 	1    2350 1200
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR04
 U 1 1 59305700
 P 1700 1750
-F 0 "#PWR?" H 1700 1500 50  0001 C CNN
+F 0 "#PWR04" H 1700 1500 50  0001 C CNN
 F 1 "Earth" H 1700 1600 50  0001 C CNN
 F 2 "" H 1700 1750 50  0001 C CNN
 F 3 "" H 1700 1750 50  0001 C CNN
@@ -176,10 +176,10 @@ F 3 "" H 1700 1750 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR05
 U 1 1 5930571D
 P 2150 1750
-F 0 "#PWR?" H 2150 1500 50  0001 C CNN
+F 0 "#PWR05" H 2150 1500 50  0001 C CNN
 F 1 "Earth" H 2150 1600 50  0001 C CNN
 F 2 "" H 2150 1750 50  0001 C CNN
 F 3 "" H 2150 1750 50  0001 C CNN
@@ -187,10 +187,10 @@ F 3 "" H 2150 1750 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR06
 U 1 1 5930573A
 P 2350 1750
-F 0 "#PWR?" H 2350 1500 50  0001 C CNN
+F 0 "#PWR06" H 2350 1500 50  0001 C CNN
 F 1 "Earth" H 2350 1600 50  0001 C CNN
 F 2 "" H 2350 1750 50  0001 C CNN
 F 3 "" H 2350 1750 50  0001 C CNN
@@ -198,54 +198,54 @@ F 3 "" H 2350 1750 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C16
 U 1 1 59305A96
 P 3800 850
-F 0 "C?" H 3825 950 50  0000 L CNN
+F 0 "C16" H 3825 950 50  0000 L CNN
 F 1 "10u" H 3825 750 50  0000 L CNN
-F 2 "" H 3838 700 50  0001 C CNN
+F 2 "Capacitors_SMD:c_elec_4x5.8" H 3838 700 50  0001 C CNN
 F 3 "" H 3800 850 50  0001 C CNN
 	1    3800 850 
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C17
 U 1 1 59305B29
 P 3800 1250
-F 0 "C?" H 3825 1350 50  0000 L CNN
+F 0 "C17" H 3825 1350 50  0000 L CNN
 F 1 "10u" H 3825 1150 50  0000 L CNN
-F 2 "" H 3838 1100 50  0001 C CNN
+F 2 "Capacitors_SMD:c_elec_4x5.8" H 3838 1100 50  0001 C CNN
 F 3 "" H 3800 1250 50  0001 C CNN
 	1    3800 1250
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C19
 U 1 1 59305CF8
 P 4050 850
-F 0 "C?" H 4075 950 50  0000 L CNN
+F 0 "C19" H 4075 950 50  0000 L CNN
 F 1 "100n" H 4075 750 50  0000 L CNN
-F 2 "" H 4088 700 50  0001 C CNN
+F 2 "Capacitors_SMD:C_1206_HandSoldering" H 4088 700 50  0001 C CNN
 F 3 "" H 4050 850 50  0001 C CNN
 	1    4050 850 
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C20
 U 1 1 59305D6F
 P 4050 1250
-F 0 "C?" H 4075 1350 50  0000 L CNN
+F 0 "C20" H 4075 1350 50  0000 L CNN
 F 1 "100n" H 4075 1150 50  0000 L CNN
-F 2 "" H 4088 1100 50  0001 C CNN
+F 2 "Capacitors_SMD:C_1206_HandSoldering" H 4088 1100 50  0001 C CNN
 F 3 "" H 4050 1250 50  0001 C CNN
 	1    4050 1250
 	1    0    0    -1  
 $EndComp
 $Comp
-L L_Small L?
+L L_Small L4
 U 1 1 59305E94
 P 4400 1450
-F 0 "L?" V 4350 1500 50  0000 L CNN
+F 0 "L4" V 4350 1500 50  0000 L CNN
 F 1 "120u" V 4350 1300 50  0000 L CNN
 F 2 "" H 4400 1450 50  0001 C CNN
 F 3 "" H 4400 1450 50  0001 C CNN
@@ -254,10 +254,10 @@ F 4 "DLV-121-M2.0" V 4400 1450 60  0001 C CNN "No."
 	0    -1   -1   0   
 $EndComp
 $Comp
-L L_Small L?
+L L_Small L3
 U 1 1 593060EE
 P 4400 650
-F 0 "L?" V 4350 700 50  0000 L CNN
+F 0 "L3" V 4350 700 50  0000 L CNN
 F 1 "120u" V 4350 500 50  0000 L CNN
 F 2 "" H 4400 650 50  0001 C CNN
 F 3 "" H 4400 650 50  0001 C CNN
@@ -266,54 +266,54 @@ F 4 "DLV-121-M2.0" V 4400 650 60  0001 C CNN "No."
 	0    -1   -1   0   
 $EndComp
 $Comp
-L C C?
+L C C24
 U 1 1 59306303
 P 4700 1250
-F 0 "C?" H 4725 1350 50  0000 L CNN
+F 0 "C24" H 4725 1350 50  0000 L CNN
 F 1 "100n" H 4725 1150 50  0000 L CNN
-F 2 "" H 4738 1100 50  0001 C CNN
+F 2 "Capacitors_SMD:C_1206_HandSoldering" H 4738 1100 50  0001 C CNN
 F 3 "" H 4700 1250 50  0001 C CNN
 	1    4700 1250
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C23
 U 1 1 59306354
 P 4700 850
-F 0 "C?" H 4725 950 50  0000 L CNN
+F 0 "C23" H 4725 950 50  0000 L CNN
 F 1 "100n" H 4725 750 50  0000 L CNN
-F 2 "" H 4738 700 50  0001 C CNN
+F 2 "Capacitors_SMD:C_1206_HandSoldering" H 4738 700 50  0001 C CNN
 F 3 "" H 4700 850 50  0001 C CNN
 	1    4700 850 
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C25
 U 1 1 593064DB
 P 5000 850
-F 0 "C?" H 5025 950 50  0000 L CNN
+F 0 "C25" H 5025 950 50  0000 L CNN
 F 1 "100u" H 5025 750 50  0000 L CNN
-F 2 "" H 5038 700 50  0001 C CNN
+F 2 "Capacitors_SMD:c_elec_6.3x7.7" H 5038 700 50  0001 C CNN
 F 3 "" H 5000 850 50  0001 C CNN
 	1    5000 850 
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C26
 U 1 1 59306550
 P 5000 1250
-F 0 "C?" H 5025 1350 50  0000 L CNN
+F 0 "C26" H 5025 1350 50  0000 L CNN
 F 1 "100u" H 5025 1150 50  0000 L CNN
-F 2 "" H 5038 1100 50  0001 C CNN
+F 2 "Capacitors_SMD:c_elec_6.3x7.7" H 5038 1100 50  0001 C CNN
 F 3 "" H 5000 1250 50  0001 C CNN
 	1    5000 1250
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR07
 U 1 1 59306CF9
 P 2500 1750
-F 0 "#PWR?" H 2500 1500 50  0001 C CNN
+F 0 "#PWR07" H 2500 1500 50  0001 C CNN
 F 1 "Earth" H 2500 1600 50  0001 C CNN
 F 2 "" H 2500 1750 50  0001 C CNN
 F 3 "" H 2500 1750 50  0001 C CNN
@@ -321,10 +321,10 @@ F 3 "" H 2500 1750 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR08
 U 1 1 59307337
 P 5500 1050
-F 0 "#PWR?" H 5500 850 50  0001 C CNN
+F 0 "#PWR08" H 5500 850 50  0001 C CNN
 F 1 "GNDPWR" H 5500 920 50  0000 C CNN
 F 2 "" H 5500 1000 50  0001 C CNN
 F 3 "" H 5500 1000 50  0001 C CNN
@@ -332,10 +332,10 @@ F 3 "" H 5500 1000 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Relais-2 K?
+L Relais-2 K1
 U 1 1 59346B99
 P 2850 6550
-F 0 "K?" H 2850 6600 60  0000 C CNN
+F 0 "K1" H 2850 6600 60  0000 C CNN
 F 1 "Relais-2" H 3250 6600 60  0000 C CNN
 F 2 "" H 2850 6550 60  0001 C CNN
 F 3 "" H 2850 6550 60  0001 C CNN
@@ -343,10 +343,10 @@ F 3 "" H 2850 6550 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Relais-2 K?
+L Relais-2 K1
 U 2 1 59346C2C
 P 2800 5700
-F 0 "K?" H 2800 5750 60  0000 C CNN
+F 0 "K1" H 2800 5750 60  0000 C CNN
 F 1 "Relais-2" H 3200 5750 60  0000 C CNN
 F 2 "" H 2800 5700 60  0001 C CNN
 F 3 "" H 2800 5700 60  0001 C CNN
@@ -354,10 +354,10 @@ F 3 "" H 2800 5700 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Relais-2 K?
+L Relais-2 K1
 U 3 1 59346CB9
 P 2800 6050
-F 0 "K?" H 2800 6100 60  0000 C CNN
+F 0 "K1" H 2800 6100 60  0000 C CNN
 F 1 "Relais-2" H 3200 6100 60  0000 C CNN
 F 2 "" H 2800 6050 60  0001 C CNN
 F 3 "" H 2800 6050 60  0001 C CNN
@@ -365,10 +365,10 @@ F 3 "" H 2800 6050 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Relais-2 K?
+L Relais-2 K2
 U 1 1 5934743F
 P 3900 6550
-F 0 "K?" H 3900 6600 60  0000 C CNN
+F 0 "K2" H 3900 6600 60  0000 C CNN
 F 1 "Relais-2" H 4300 6600 60  0000 C CNN
 F 2 "" H 3900 6550 60  0001 C CNN
 F 3 "" H 3900 6550 60  0001 C CNN
@@ -376,10 +376,10 @@ F 3 "" H 3900 6550 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Relais-2 K?
+L Relais-2 K2
 U 2 1 59347445
 P 5050 6350
-F 0 "K?" H 5050 6400 60  0000 C CNN
+F 0 "K2" H 5050 6400 60  0000 C CNN
 F 1 "Relais-2" H 5450 6400 60  0000 C CNN
 F 2 "" H 5050 6350 60  0001 C CNN
 F 3 "" H 5050 6350 60  0001 C CNN
@@ -387,10 +387,10 @@ F 3 "" H 5050 6350 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Relais-2 K?
+L Relais-2 K2
 U 3 1 5934744B
 P 5100 6950
-F 0 "K?" H 5100 7000 60  0000 C CNN
+F 0 "K2" H 5100 7000 60  0000 C CNN
 F 1 "Relais-2" H 5500 7000 60  0000 C CNN
 F 2 "" H 5100 6950 60  0001 C CNN
 F 3 "" H 5100 6950 60  0001 C CNN
@@ -398,10 +398,10 @@ F 3 "" H 5100 6950 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L PCM2704 U?
+L PCM2704 U1
 U 1 1 59348397
 P 2500 2550
-F 0 "U?" H 2550 2600 60  0000 C CNN
+F 0 "U1" H 2550 2600 60  0000 C CNN
 F 1 "PCM2704" H 2900 2600 60  0000 C CNN
 F 2 "" H 2500 2550 60  0001 C CNN
 F 3 "" H 2500 2550 60  0001 C CNN
@@ -409,10 +409,10 @@ F 3 "" H 2500 2550 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Crystal Y?
+L Crystal Y1
 U 1 1 59348602
 P 2800 2250
-F 0 "Y?" H 2800 2400 50  0000 C CNN
+F 0 "Y1" H 2800 2400 50  0000 C CNN
 F 1 "12MHz" H 2800 2100 50  0000 C CNN
 F 2 "" H 2800 2250 50  0001 C CNN
 F 3 "" H 2800 2250 50  0001 C CNN
@@ -420,10 +420,10 @@ F 3 "" H 2800 2250 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L R R?
+L R R5
 U 1 1 593487DE
 P 2800 2000
-F 0 "R?" V 2880 2000 50  0000 C CNN
+F 0 "R5" V 2880 2000 50  0000 C CNN
 F 1 "1M" V 2800 2000 50  0000 C CNN
 F 2 "" V 2730 2000 50  0001 C CNN
 F 3 "" H 2800 2000 50  0001 C CNN
@@ -431,32 +431,32 @@ F 3 "" H 2800 2000 50  0001 C CNN
 	0    -1   -1   0   
 $EndComp
 $Comp
-L C C?
+L C C5
 U 1 1 59348C90
 P 2050 2150
-F 0 "C?" H 2075 2250 50  0000 L CNN
+F 0 "C5" H 2075 2250 50  0000 L CNN
 F 1 "27p" H 2075 2050 50  0000 L CNN
-F 2 "" H 2088 2000 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2088 2000 50  0001 C CNN
 F 3 "" H 2050 2150 50  0001 C CNN
 	1    2050 2150
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C14
 U 1 1 59348F37
 P 3550 2150
-F 0 "C?" H 3575 2250 50  0000 L CNN
+F 0 "C14" H 3575 2250 50  0000 L CNN
 F 1 "27p" H 3575 2050 50  0000 L CNN
-F 2 "" H 3588 2000 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 3588 2000 50  0001 C CNN
 F 3 "" H 3550 2150 50  0001 C CNN
 	1    3550 2150
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR09
 U 1 1 593491B9
 P 2050 2350
-F 0 "#PWR?" H 2050 2100 50  0001 C CNN
+F 0 "#PWR09" H 2050 2100 50  0001 C CNN
 F 1 "Earth" H 2050 2200 50  0001 C CNN
 F 2 "" H 2050 2350 50  0001 C CNN
 F 3 "" H 2050 2350 50  0001 C CNN
@@ -464,10 +464,10 @@ F 3 "" H 2050 2350 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR010
 U 1 1 593492FA
 P 3550 2350
-F 0 "#PWR?" H 3550 2100 50  0001 C CNN
+F 0 "#PWR010" H 3550 2100 50  0001 C CNN
 F 1 "Earth" H 3550 2200 50  0001 C CNN
 F 2 "" H 3550 2350 50  0001 C CNN
 F 3 "" H 3550 2350 50  0001 C CNN
@@ -482,10 +482,10 @@ NoConn ~ 3350 3000
 NoConn ~ 3350 3100
 NoConn ~ 3350 3200
 $Comp
-L +3V3 #PWR?
+L +3V3 #PWR011
 U 1 1 59349848
 P 2050 3200
-F 0 "#PWR?" H 2050 3050 50  0001 C CNN
+F 0 "#PWR011" H 2050 3050 50  0001 C CNN
 F 1 "+3V3" H 2050 3340 50  0000 C CNN
 F 2 "" H 2050 3200 50  0001 C CNN
 F 3 "" H 2050 3200 50  0001 C CNN
@@ -493,10 +493,10 @@ F 3 "" H 2050 3200 50  0001 C CNN
 	0    -1   -1   0   
 $EndComp
 $Comp
-L +3V3 #PWR?
+L +3V3 #PWR012
 U 1 1 59349CA0
 P 3600 2750
-F 0 "#PWR?" H 3600 2600 50  0001 C CNN
+F 0 "#PWR012" H 3600 2600 50  0001 C CNN
 F 1 "+3V3" H 3600 2890 50  0000 C CNN
 F 2 "" H 3600 2750 50  0001 C CNN
 F 3 "" H 3600 2750 50  0001 C CNN
@@ -504,21 +504,21 @@ F 3 "" H 3600 2750 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C22
 U 1 1 59349E35
 P 4300 3400
-F 0 "C?" H 4325 3500 50  0000 L CNN
+F 0 "C22" H 4325 3500 50  0000 L CNN
 F 1 "1u" H 4325 3300 50  0000 L CNN
-F 2 "" H 4338 3250 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 4338 3250 50  0001 C CNN
 F 3 "" H 4300 3400 50  0001 C CNN
 	1    4300 3400
 	0    1    1    0   
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR013
 U 1 1 5934A02A
 P 4450 4150
-F 0 "#PWR?" H 4450 3900 50  0001 C CNN
+F 0 "#PWR013" H 4450 3900 50  0001 C CNN
 F 1 "Earth" H 4450 4000 50  0001 C CNN
 F 2 "" H 4450 4150 50  0001 C CNN
 F 3 "" H 4450 4150 50  0001 C CNN
@@ -526,21 +526,21 @@ F 3 "" H 4450 4150 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C21
 U 1 1 5934A14D
 P 4250 3750
-F 0 "C?" H 4275 3850 50  0000 L CNN
+F 0 "C21" H 4275 3850 50  0000 L CNN
 F 1 "1u" H 4275 3650 50  0000 L CNN
-F 2 "" H 4288 3600 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 4288 3600 50  0001 C CNN
 F 3 "" H 4250 3750 50  0001 C CNN
 	1    4250 3750
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR014
 U 1 1 5934A2A9
 P 4250 4150
-F 0 "#PWR?" H 4250 3900 50  0001 C CNN
+F 0 "#PWR014" H 4250 3900 50  0001 C CNN
 F 1 "Earth" H 4250 4000 50  0001 C CNN
 F 2 "" H 4250 4150 50  0001 C CNN
 F 3 "" H 4250 4150 50  0001 C CNN
@@ -548,32 +548,32 @@ F 3 "" H 4250 4150 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C4
 U 1 1 5934A4BD
 P 1950 3950
-F 0 "C?" H 1975 4050 50  0000 L CNN
+F 0 "C4" H 1975 4050 50  0000 L CNN
 F 1 "1u" H 1975 3850 50  0000 L CNN
-F 2 "" H 1988 3800 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 1988 3800 50  0001 C CNN
 F 3 "" H 1950 3950 50  0001 C CNN
 	1    1950 3950
 	-1   0    0    1   
 $EndComp
 $Comp
-L C C?
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 U 1 1 5934A59B
 P 3850 3950
-F 0 "C?" H 3875 4050 50  0000 L CNN
+F 0 "C18" H 3875 4050 50  0000 L CNN
 F 1 "1u" H 3875 3850 50  0000 L CNN
-F 2 "" H 3888 3800 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 3888 3800 50  0001 C CNN
 F 3 "" H 3850 3950 50  0001 C CNN
 	1    3850 3950
 	-1   0    0    1   
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR015
 U 1 1 5934A7B6
 P 3850 4150
-F 0 "#PWR?" H 3850 3900 50  0001 C CNN
+F 0 "#PWR015" H 3850 3900 50  0001 C CNN
 F 1 "Earth" H 3850 4000 50  0001 C CNN
 F 2 "" H 3850 4150 50  0001 C CNN
 F 3 "" H 3850 4150 50  0001 C CNN
@@ -581,10 +581,10 @@ F 3 "" H 3850 4150 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR016
 U 1 1 5934AB12
 P 1950 4150
-F 0 "#PWR?" H 1950 3900 50  0001 C CNN
+F 0 "#PWR016" H 1950 3900 50  0001 C CNN
 F 1 "Earth" H 1950 4000 50  0001 C CNN
 F 2 "" H 1950 4150 50  0001 C CNN
 F 3 "" H 1950 4150 50  0001 C CNN
@@ -596,10 +596,10 @@ LUSB
 Text Label 3550 4800 1    60   ~ 0
 RUSB
 $Comp
-L Earth #PWR?
+L Earth #PWR017
 U 1 1 5934B062
 P 4050 4150
-F 0 "#PWR?" H 4050 3900 50  0001 C CNN
+F 0 "#PWR017" H 4050 3900 50  0001 C CNN
 F 1 "Earth" H 4050 4000 50  0001 C CNN
 F 2 "" H 4050 4150 50  0001 C CNN
 F 3 "" H 4050 4150 50  0001 C CNN
@@ -607,10 +607,10 @@ F 3 "" H 4050 4150 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR018
 U 1 1 5934B239
 P 1750 4150
-F 0 "#PWR?" H 1750 3900 50  0001 C CNN
+F 0 "#PWR018" H 1750 3900 50  0001 C CNN
 F 1 "Earth" H 1750 4000 50  0001 C CNN
 F 2 "" H 1750 4150 50  0001 C CNN
 F 3 "" H 1750 4150 50  0001 C CNN
@@ -618,10 +618,10 @@ F 3 "" H 1750 4150 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L L_Small L?
+L L_Small L1
 U 1 1 5934B57E
 P 1500 2200
-F 0 "L?" H 1530 2240 50  0000 L CNN
+F 0 "L1" H 1530 2240 50  0000 L CNN
 F 1 "47u" H 1530 2160 50  0000 L CNN
 F 2 "" H 1500 2200 50  0001 C CNN
 F 3 "" H 1500 2200 50  0001 C CNN
@@ -629,21 +629,21 @@ F 3 "" H 1500 2200 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C1
 U 1 1 5934B839
 P 1000 2550
-F 0 "C?" H 1025 2650 50  0000 L CNN
+F 0 "C1" H 1025 2650 50  0000 L CNN
 F 1 "10u" H 1025 2450 50  0000 L CNN
-F 2 "" H 1038 2400 50  0001 C CNN
+F 2 "Capacitors_SMD:c_elec_5x5.3" H 1038 2400 50  0001 C CNN
 F 3 "" H 1000 2550 50  0001 C CNN
 	1    1000 2550
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR019
 U 1 1 5934BAB4
 P 1000 2750
-F 0 "#PWR?" H 1000 2500 50  0001 C CNN
+F 0 "#PWR019" H 1000 2500 50  0001 C CNN
 F 1 "Earth" H 1000 2600 50  0001 C CNN
 F 2 "" H 1000 2750 50  0001 C CNN
 F 3 "" H 1000 2750 50  0001 C CNN
@@ -651,21 +651,21 @@ F 3 "" H 1000 2750 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C2
 U 1 1 5934BF3E
 P 1500 3700
-F 0 "C?" H 1525 3800 50  0000 L CNN
+F 0 "C2" H 1525 3800 50  0000 L CNN
 F 1 "100n" H 1525 3600 50  0000 L CNN
-F 2 "" H 1538 3550 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 1538 3550 50  0001 C CNN
 F 3 "" H 1500 3700 50  0001 C CNN
 	1    1500 3700
 	-1   0    0    1   
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR020
 U 1 1 5934C0E0
 P 1500 4150
-F 0 "#PWR?" H 1500 3900 50  0001 C CNN
+F 0 "#PWR020" H 1500 3900 50  0001 C CNN
 F 1 "Earth" H 1500 4000 50  0001 C CNN
 F 2 "" H 1500 4150 50  0001 C CNN
 F 3 "" H 1500 4150 50  0001 C CNN
@@ -677,21 +677,21 @@ D-
 Text Label 1050 3400 0    60   ~ 0
 D+
 $Comp
-L C C?
+L C C6
 U 1 1 5934D473
 P 2050 2950
-F 0 "C?" H 2075 3050 50  0000 L CNN
+F 0 "C6" H 2075 3050 50  0000 L CNN
 F 1 "200n" H 2075 2850 50  0000 L CNN
-F 2 "" H 2088 2800 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2088 2800 50  0001 C CNN
 F 3 "" H 2050 2950 50  0001 C CNN
 	1    2050 2950
 	-1   0    0    1   
 $EndComp
 $Comp
-L R R?
+L R R3
 U 1 1 5934E099
 P 2050 3300
-F 0 "R?" V 2130 3300 50  0000 C CNN
+F 0 "R3" V 2130 3300 50  0000 C CNN
 F 1 "22" V 2050 3300 50  0000 C CNN
 F 2 "" V 1980 3300 50  0001 C CNN
 F 3 "" H 2050 3300 50  0001 C CNN
@@ -699,10 +699,10 @@ F 3 "" H 2050 3300 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L R R?
+L R R2
 U 1 1 5934E1D2
 P 1750 3400
-F 0 "R?" V 1830 3400 50  0000 C CNN
+F 0 "R2" V 1830 3400 50  0000 C CNN
 F 1 "22" V 1750 3400 50  0000 C CNN
 F 2 "" V 1680 3400 50  0001 C CNN
 F 3 "" H 1750 3400 50  0001 C CNN
@@ -710,10 +710,10 @@ F 3 "" H 1750 3400 50  0001 C CNN
 	0    -1   -1   0   
 $EndComp
 $Comp
-L R R?
+L R R1
 U 1 1 5934E5F3
 P 1350 3100
-F 0 "R?" V 1430 3100 50  0000 C CNN
+F 0 "R1" V 1430 3100 50  0000 C CNN
 F 1 "1k5" V 1350 3100 50  0000 C CNN
 F 2 "" V 1280 3100 50  0001 C CNN
 F 3 "" H 1350 3100 50  0001 C CNN
@@ -721,10 +721,10 @@ F 3 "" H 1350 3100 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L +3V3 #PWR?
+L +3V3 #PWR021
 U 1 1 5934E698
 P 1350 2900
-F 0 "#PWR?" H 1350 2750 50  0001 C CNN
+F 0 "#PWR021" H 1350 2750 50  0001 C CNN
 F 1 "+3V3" H 1350 3040 50  0000 C CNN
 F 2 "" H 1350 2900 50  0001 C CNN
 F 3 "" H 1350 2900 50  0001 C CNN
@@ -732,10 +732,10 @@ F 3 "" H 1350 2900 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L R R?
+L R R6
 U 1 1 5934ED7E
 P 3350 4150
-F 0 "R?" V 3430 4150 50  0000 C CNN
+F 0 "R6" V 3430 4150 50  0000 C CNN
 F 1 "16" V 3350 4150 50  0000 C CNN
 F 2 "" V 3280 4150 50  0001 C CNN
 F 3 "" H 3350 4150 50  0001 C CNN
@@ -743,43 +743,43 @@ F 3 "" H 3350 4150 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L C C?
+L C C13
 U 1 1 5934F029
 P 3000 4150
-F 0 "C?" H 3025 4250 50  0000 L CNN
+F 0 "C13" H 3025 4250 50  0000 L CNN
 F 1 "22n" H 3025 4050 50  0000 L CNN
-F 2 "" H 3038 4000 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 3038 4000 50  0001 C CNN
 F 3 "" H 3000 4150 50  0001 C CNN
 	1    3000 4150
 	0    -1   -1   0   
 $EndComp
 $Comp
-L C C?
+L C C15
 U 1 1 5934F52B
 P 3550 4400
-F 0 "C?" H 3575 4500 50  0000 L CNN
+F 0 "C15" H 3575 4500 50  0000 L CNN
 F 1 "1u" H 3575 4300 50  0000 L CNN
-F 2 "" H 3588 4250 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 3588 4250 50  0001 C CNN
 F 3 "" H 3550 4400 50  0001 C CNN
 	1    3550 4400
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C12
 U 1 1 5934FA03
 P 2600 4150
-F 0 "C?" H 2625 4250 50  0000 L CNN
+F 0 "C12" H 2625 4250 50  0000 L CNN
 F 1 "22n" H 2625 4050 50  0000 L CNN
-F 2 "" H 2638 4000 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2638 4000 50  0001 C CNN
 F 3 "" H 2600 4150 50  0001 C CNN
 	1    2600 4150
 	0    -1   -1   0   
 $EndComp
 $Comp
-L R R?
+L R R4
 U 1 1 5934FAAF
 P 2250 4150
-F 0 "R?" V 2330 4150 50  0000 C CNN
+F 0 "R4" V 2330 4150 50  0000 C CNN
 F 1 "16" V 2250 4150 50  0000 C CNN
 F 2 "" V 2180 4150 50  0001 C CNN
 F 3 "" H 2250 4150 50  0001 C CNN
@@ -787,10 +787,10 @@ F 3 "" H 2250 4150 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR022
 U 1 1 5934FEA4
 P 2800 4250
-F 0 "#PWR?" H 2800 4000 50  0001 C CNN
+F 0 "#PWR022" H 2800 4000 50  0001 C CNN
 F 1 "Earth" H 2800 4100 50  0001 C CNN
 F 2 "" H 2800 4250 50  0001 C CNN
 F 3 "" H 2800 4250 50  0001 C CNN
@@ -798,12 +798,12 @@ F 3 "" H 2800 4250 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C9
 U 1 1 593501B5
 P 2100 4400
-F 0 "C?" H 2125 4500 50  0000 L CNN
+F 0 "C9" H 2125 4500 50  0000 L CNN
 F 1 "1u" H 2125 4300 50  0000 L CNN
-F 2 "" H 2138 4250 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2138 4250 50  0001 C CNN
 F 3 "" H 2100 4400 50  0001 C CNN
 	1    2100 4400
 	1    0    0    -1  
@@ -813,10 +813,10 @@ LUSB
 Text Label 2450 6150 0    60   ~ 0
 RUSB
 $Comp
-L JACK_TRS_6PINS J?
+L JACK_TRS_6PINS J2
 U 1 1 5935A296
 P 1100 6050
-F 0 "J?" H 1100 6450 50  0000 C CNN
+F 0 "J2" H 1100 6450 50  0000 C CNN
 F 1 "JACK_TRS_6PINS" H 1050 5750 50  0000 C CNN
 F 2 "" H 1200 5900 50  0001 C CNN
 F 3 "" H 1200 5900 50  0001 C CNN
@@ -824,23 +824,23 @@ F 3 "" H 1200 5900 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C8
 U 1 1 5935A9B7
 P 2050 6250
-F 0 "C?" H 2075 6350 50  0000 L CNN
+F 0 "C8" H 2075 6350 50  0000 L CNN
 F 1 "1u" H 2075 6150 50  0000 L CNN
-F 2 "" H 2088 6100 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2088 6100 50  0001 C CNN
 F 3 "" H 2050 6250 50  0001 C CNN
 	1    2050 6250
 	0    1    1    0   
 $EndComp
 $Comp
-L C C?
+L C C7
 U 1 1 5935AC3B
 P 2050 5900
-F 0 "C?" H 2075 6000 50  0000 L CNN
+F 0 "C7" H 2075 6000 50  0000 L CNN
 F 1 "1u" H 2075 5800 50  0000 L CNN
-F 2 "" H 2088 5750 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2088 5750 50  0001 C CNN
 F 3 "" H 2050 5900 50  0001 C CNN
 	1    2050 5900
 	0    1    1    0   
@@ -849,10 +849,10 @@ NoConn ~ 1500 6150
 NoConn ~ 1500 5950
 NoConn ~ 1500 5750
 $Comp
-L GNDA #PWR?
+L GNDA #PWR023
 U 1 1 5935B548
 P 1600 5850
-F 0 "#PWR?" H 1600 5600 50  0001 C CNN
+F 0 "#PWR023" H 1600 5600 50  0001 C CNN
 F 1 "GNDA" H 1600 5700 50  0000 C CNN
 F 2 "" H 1600 5850 50  0001 C CNN
 F 3 "" H 1600 5850 50  0001 C CNN
@@ -860,10 +860,10 @@ F 3 "" H 1600 5850 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L +5V #PWR?
+L +5V #PWR024
 U 1 1 5935BE5E
 P 1700 850
-F 0 "#PWR?" H 1700 700 50  0001 C CNN
+F 0 "#PWR024" H 1700 700 50  0001 C CNN
 F 1 "+5V" H 1700 990 50  0000 C CNN
 F 2 "" H 1700 850 50  0001 C CNN
 F 3 "" H 1700 850 50  0001 C CNN
@@ -871,10 +871,10 @@ F 3 "" H 1700 850 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
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 U 1 1 5935CBA9
 P 4750 6450
-F 0 "#PWR?" H 4750 6200 50  0001 C CNN
+F 0 "#PWR025" H 4750 6200 50  0001 C CNN
 F 1 "Earth" H 4750 6300 50  0001 C CNN
 F 2 "" H 4750 6450 50  0001 C CNN
 F 3 "" H 4750 6450 50  0001 C CNN
@@ -882,10 +882,10 @@ F 3 "" H 4750 6450 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR026
 U 1 1 5935D032
 P 5700 6500
-F 0 "#PWR?" H 5700 6300 50  0001 C CNN
+F 0 "#PWR026" H 5700 6300 50  0001 C CNN
 F 1 "GNDPWR" H 5700 6370 50  0000 C CNN
 F 2 "" H 5700 6450 50  0001 C CNN
 F 3 "" H 5700 6450 50  0001 C CNN
@@ -893,10 +893,10 @@ F 3 "" H 5700 6450 50  0001 C CNN
 	0    -1   -1   0   
 $EndComp
 $Comp
-L GNDA #PWR?
+L GNDA #PWR027
 U 1 1 5935D4FC
 P 4950 6550
-F 0 "#PWR?" H 4950 6300 50  0001 C CNN
+F 0 "#PWR027" H 4950 6300 50  0001 C CNN
 F 1 "GNDA" H 4950 6400 50  0000 C CNN
 F 2 "" H 4950 6550 50  0001 C CNN
 F 3 "" H 4950 6550 50  0001 C CNN
@@ -904,10 +904,10 @@ F 3 "" H 4950 6550 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR028
 U 1 1 5935D974
 P 5750 7100
-F 0 "#PWR?" H 5750 6900 50  0001 C CNN
+F 0 "#PWR028" H 5750 6900 50  0001 C CNN
 F 1 "GNDPWR" H 5750 6970 50  0000 C CNN
 F 2 "" H 5750 7050 50  0001 C CNN
 F 3 "" H 5750 7050 50  0001 C CNN
@@ -915,10 +915,10 @@ F 3 "" H 5750 7050 50  0001 C CNN
 	0    -1   -1   0   
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR029
 U 1 1 5935DAF1
 P 4750 7050
-F 0 "#PWR?" H 4750 6800 50  0001 C CNN
+F 0 "#PWR029" H 4750 6800 50  0001 C CNN
 F 1 "Earth" H 4750 6900 50  0001 C CNN
 F 2 "" H 4750 7050 50  0001 C CNN
 F 3 "" H 4750 7050 50  0001 C CNN
@@ -926,10 +926,10 @@ F 3 "" H 4750 7050 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L GNDA #PWR?
+L GNDA #PWR030
 U 1 1 5935DAF8
 P 4950 7150
-F 0 "#PWR?" H 4950 6900 50  0001 C CNN
+F 0 "#PWR030" H 4950 6900 50  0001 C CNN
 F 1 "GNDA" H 4950 7000 50  0000 C CNN
 F 2 "" H 4950 7150 50  0001 C CNN
 F 3 "" H 4950 7150 50  0001 C CNN
@@ -941,10 +941,10 @@ FTR-B4CA 4,5V
 Text Notes 2450 7450 0    60   ~ 0
 FTR-B4CA 4,5V
 $Comp
-L OPA2134 U?
+L OPA2134 U3
 U 1 1 5935FD14
 P 6750 750
-F 0 "U?" H 6850 800 60  0000 C CNN
+F 0 "U3" H 6850 800 60  0000 C CNN
 F 1 "OPA2134" H 7250 800 60  0000 C CNN
 F 2 "" H 6800 600 60  0001 C CNN
 F 3 "" H 6800 600 60  0001 C CNN
@@ -952,10 +952,10 @@ F 3 "" H 6800 600 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
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+L L_Small L5
 U 1 1 59360759
 P 6250 850
-F 0 "L?" V 6200 900 50  0000 L CNN
+F 0 "L5" V 6200 900 50  0000 L CNN
 F 1 "10u" V 6200 700 50  0000 L CNN
 F 2 "" H 6250 850 50  0001 C CNN
 F 3 "" H 6250 850 50  0001 C CNN
@@ -964,10 +964,10 @@ F 4 "DLV-121-M2.0" V 6250 850 60  0001 C CNN "No."
 	0    -1   -1   0   
 $EndComp
 $Comp
-L L_Small L?
+L L_Small L7
 U 1 1 59360894
 P 7650 850
-F 0 "L?" V 7600 900 50  0000 L CNN
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 F 1 "10u" V 7600 700 50  0000 L CNN
 F 2 "" H 7650 850 50  0001 C CNN
 F 3 "" H 7650 850 50  0001 C CNN
@@ -976,10 +976,10 @@ F 4 "DLV-121-M2.0" V 7650 850 60  0001 C CNN "No."
 	0    -1   -1   0   
 $EndComp
 $Comp
-L +12V #PWR?
+L +12V #PWR031
 U 1 1 593617B8
 P 6050 850
-F 0 "#PWR?" H 6050 700 50  0001 C CNN
+F 0 "#PWR031" H 6050 700 50  0001 C CNN
 F 1 "+12V" H 6050 990 50  0000 C CNN
 F 2 "" H 6050 850 50  0001 C CNN
 F 3 "" H 6050 850 50  0001 C CNN
@@ -987,10 +987,10 @@ F 3 "" H 6050 850 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L -12V #PWR?
+L -12V #PWR45
 U 1 1 59361859
 P 7850 850
-F 0 "#PWR?" H 7850 950 50  0001 C CNN
+F 0 "#PWR45" H 7850 950 50  0001 C CNN
 F 1 "-12V" H 7850 1000 50  0000 C CNN
 F 2 "" H 7850 850 50  0001 C CNN
 F 3 "" H 7850 850 50  0001 C CNN
@@ -998,21 +998,21 @@ F 3 "" H 7850 850 50  0001 C CNN
 	-1   0    0    1   
 $EndComp
 $Comp
-L C C?
+L C C29
 U 1 1 59361C5D
 P 6400 1100
-F 0 "C?" H 6425 1200 50  0000 L CNN
+F 0 "C29" H 6425 1200 50  0000 L CNN
 F 1 "100n" H 6425 1000 50  0000 L CNN
-F 2 "" H 6438 950 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 6438 950 50  0001 C CNN
 F 3 "" H 6400 1100 50  0001 C CNN
 	1    6400 1100
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C34
 U 1 1 59361D2F
 P 7500 1100
-F 0 "C?" H 7525 1200 50  0000 L CNN
+F 0 "C34" H 7525 1200 50  0000 L CNN
 F 1 "100n" H 7525 1000 50  0000 L CNN
 F 2 "" H 7538 950 50  0001 C CNN
 F 3 "" H 7500 1100 50  0001 C CNN
@@ -1020,10 +1020,10 @@ F 3 "" H 7500 1100 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C31
 U 1 1 59361F8D
 P 6550 1450
-F 0 "C?" H 6575 1550 50  0000 L CNN
+F 0 "C31" H 6575 1550 50  0000 L CNN
 F 1 "1u" H 6575 1350 50  0000 L CNN
 F 2 "" H 6588 1300 50  0001 C CNN
 F 3 "" H 6550 1450 50  0001 C CNN
@@ -1031,10 +1031,10 @@ F 3 "" H 6550 1450 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L CP C?
+L CP C33
 U 1 1 593620C9
 P 7350 1450
-F 0 "C?" H 7375 1550 50  0000 L CNN
+F 0 "C33" H 7375 1550 50  0000 L CNN
 F 1 "1u" H 7375 1350 50  0000 L CNN
 F 2 "" H 7388 1300 50  0001 C CNN
 F 3 "" H 7350 1450 50  0001 C CNN
@@ -1042,10 +1042,10 @@ F 3 "" H 7350 1450 50  0001 C CNN
 	-1   0    0    1   
 $EndComp
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR032
 U 1 1 59362E58
 P 6400 1700
-F 0 "#PWR?" H 6400 1500 50  0001 C CNN
+F 0 "#PWR032" H 6400 1500 50  0001 C CNN
 F 1 "GNDPWR" H 6400 1550 50  0000 C CNN
 F 2 "" H 6400 1650 50  0001 C CNN
 F 3 "" H 6400 1650 50  0001 C CNN
@@ -1053,10 +1053,10 @@ F 3 "" H 6400 1650 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR033
 U 1 1 59362F71
 P 6550 1700
-F 0 "#PWR?" H 6550 1500 50  0001 C CNN
+F 0 "#PWR033" H 6550 1500 50  0001 C CNN
 F 1 "GNDPWR" H 6550 1450 50  0000 C CNN
 F 2 "" H 6550 1650 50  0001 C CNN
 F 3 "" H 6550 1650 50  0001 C CNN
@@ -1064,10 +1064,10 @@ F 3 "" H 6550 1650 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR034
 U 1 1 593634C8
 P 7350 1700
-F 0 "#PWR?" H 7350 1500 50  0001 C CNN
+F 0 "#PWR034" H 7350 1500 50  0001 C CNN
 F 1 "GNDPWR" H 7350 1550 50  0000 C CNN
 F 2 "" H 7350 1650 50  0001 C CNN
 F 3 "" H 7350 1650 50  0001 C CNN
@@ -1075,10 +1075,10 @@ F 3 "" H 7350 1650 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR035
 U 1 1 593634CE
 P 7500 1700
-F 0 "#PWR?" H 7500 1500 50  0001 C CNN
+F 0 "#PWR035" H 7500 1500 50  0001 C CNN
 F 1 "GNDPWR" H 7500 1450 50  0000 C CNN
 F 2 "" H 7500 1650 50  0001 C CNN
 F 3 "" H 7500 1650 50  0001 C CNN
@@ -1086,10 +1086,10 @@ F 3 "" H 7500 1650 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L OPA2134 U?
+L OPA2134 U3
 U 2 1 59363C3C
 P 4850 4550
-F 0 "U?" H 4950 4600 60  0000 C CNN
+F 0 "U3" H 4950 4600 60  0000 C CNN
 F 1 "OPA2134" H 5250 4500 60  0000 C CNN
 F 2 "" H 4900 4400 60  0001 C CNN
 F 3 "" H 4900 4400 60  0001 C CNN
@@ -1097,10 +1097,10 @@ F 3 "" H 4900 4400 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L OPA2134 U?
+L OPA2134 U3
 U 3 1 59363D51
 P 4850 5400
-F 0 "U?" H 4950 5450 60  0000 C CNN
+F 0 "U3" H 4950 5450 60  0000 C CNN
 F 1 "OPA2134" H 5250 5350 60  0000 C CNN
 F 2 "" H 4900 5250 60  0001 C CNN
 F 3 "" H 4900 5250 60  0001 C CNN
@@ -1407,10 +1407,10 @@ Wire Wire Line
 	4600 5250 5150 5250
 Connection ~ 4600 5000
 $Comp
-L R R?
+L R R9
 U 1 1 59364F92
 P 5300 5250
-F 0 "R?" V 5380 5250 50  0000 C CNN
+F 0 "R9" V 5380 5250 50  0000 C CNN
 F 1 "1k" V 5300 5250 50  0000 C CNN
 F 2 "" V 5230 5250 50  0001 C CNN
 F 3 "" H 5300 5250 50  0001 C CNN
@@ -1423,12 +1423,12 @@ Wire Wire Line
 	5050 5100 5200 5100
 Connection ~ 5050 5250
 $Comp
-L C C?
+L C C27
 U 1 1 593652A9
 P 5350 5100
-F 0 "C?" V 5400 5150 50  0000 L CNN
+F 0 "C27" V 5400 5150 50  0000 L CNN
 F 1 "2n7" V 5250 5200 50  0000 L CNN
-F 2 "" H 5388 4950 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 5388 4950 50  0001 C CNN
 F 3 "" H 5350 5100 50  0001 C CNN
 	1    5350 5100
 	0    1    1    0   
@@ -1445,10 +1445,10 @@ Wire Wire Line
 	5750 4850 5650 4850
 Connection ~ 5650 5100
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR036
 U 1 1 59365F86
 P 4500 4700
-F 0 "#PWR?" H 4500 4500 50  0001 C CNN
+F 0 "#PWR036" H 4500 4500 50  0001 C CNN
 F 1 "GNDPWR" H 4500 4550 50  0000 C CNN
 F 2 "" H 4500 4650 50  0001 C CNN
 F 3 "" H 4500 4650 50  0001 C CNN
@@ -1462,10 +1462,10 @@ Wire Wire Line
 Wire Wire Line
 	3350 5850 3550 5850
 $Comp
-L R R?
+L R R10
 U 1 1 59368717
 P 5350 6100
-F 0 "R?" V 5430 6100 50  0000 C CNN
+F 0 "R10" V 5430 6100 50  0000 C CNN
 F 1 "1k" V 5350 6100 50  0000 C CNN
 F 2 "" V 5280 6100 50  0001 C CNN
 F 3 "" H 5350 6100 50  0001 C CNN
@@ -1473,12 +1473,12 @@ F 3 "" H 5350 6100 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L C C?
+L C C28
 U 1 1 593688FD
 P 5350 5900
-F 0 "C?" V 5400 5950 50  0000 L CNN
+F 0 "C28" V 5400 5950 50  0000 L CNN
 F 1 "2n7" V 5250 6000 50  0000 L CNN
-F 2 "" H 5388 5750 50  0001 C CNN
+F 2 "Capacitors_SMD:C_0805_HandSoldering" H 5388 5750 50  0001 C CNN
 F 3 "" H 5350 5900 50  0001 C CNN
 	1    5350 5900
 	0    1    1    0   
@@ -1509,10 +1509,10 @@ Wire Wire Line
 	5750 5700 5650 5700
 Connection ~ 5550 6000
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR037
 U 1 1 59369360
 P 4500 5550
-F 0 "#PWR?" H 4500 5350 50  0001 C CNN
+F 0 "#PWR037" H 4500 5350 50  0001 C CNN
 F 1 "GNDPWR" H 4500 5400 50  0000 C CNN
 F 2 "" H 4500 5500 50  0001 C CNN
 F 3 "" H 4500 5500 50  0001 C CNN
@@ -1522,10 +1522,10 @@ $EndComp
 Wire Wire Line
 	4500 5550 4650 5550
 $Comp
-L POT_Dual RV?
+L POT_Dual RV1
 U 1 1 5936A41E
 P 3900 5300
-F 0 "RV?" H 3900 5450 50  0000 C CNN
+F 0 "RV1" H 3900 5450 50  0000 C CNN
 F 1 "50k" H 3900 5375 50  0000 C CNN
 F 2 "" H 4150 5225 50  0001 C CNN
 F 3 "" H 4150 5225 50  0001 C CNN
@@ -1553,36 +1553,36 @@ Wire Wire Line
 	4400 5200 4400 5000
 Connection ~ 4000 5200
 $Comp
-L Earth #PWR?
+L Earth #PWR038
 U 1 1 5936B546
-P 3000 7150
-F 0 "#PWR?" H 3000 6900 50  0001 C CNN
-F 1 "Earth" H 3000 7000 50  0001 C CNN
-F 2 "" H 3000 7150 50  0001 C CNN
-F 3 "" H 3000 7150 50  0001 C CNN
-	1    3000 7150
+P 3000 7200
+F 0 "#PWR038" H 3000 6950 50  0001 C CNN
+F 1 "Earth" H 3000 7050 50  0001 C CNN
+F 2 "" H 3000 7200 50  0001 C CNN
+F 3 "" H 3000 7200 50  0001 C CNN
+	1    3000 7200
 	1    0    0    -1  
 $EndComp
 $Comp
-L Earth #PWR?
+L Earth #PWR039
 U 1 1 5936B739
-P 4050 7150
-F 0 "#PWR?" H 4050 6900 50  0001 C CNN
-F 1 "Earth" H 4050 7000 50  0001 C CNN
-F 2 "" H 4050 7150 50  0001 C CNN
-F 3 "" H 4050 7150 50  0001 C CNN
-	1    4050 7150
+P 4050 7200
+F 0 "#PWR039" H 4050 6950 50  0001 C CNN
+F 1 "Earth" H 4050 7050 50  0001 C CNN
+F 2 "" H 4050 7200 50  0001 C CNN
+F 3 "" H 4050 7200 50  0001 C CNN
+	1    4050 7200
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	4050 7150 4050 7100
+	4050 7200 4050 7100
 Wire Wire Line
-	3000 7150 3000 7100
+	3000 7200 3000 7100
 $Comp
-L TPA6120 U?
+L TPA6120 U4
 U 1 1 5936C2F8
 P 6950 3200
-F 0 "U?" H 7000 3250 60  0000 C CNN
+F 0 "U4" H 7000 3250 60  0000 C CNN
 F 1 "TPA6120" H 7300 3250 60  0000 C CNN
 F 2 "" H 6950 3200 60  0001 C CNN
 F 3 "" H 6950 3200 60  0001 C CNN
@@ -1590,10 +1590,10 @@ F 3 "" H 6950 3200 60  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L L_Small L?
+L L_Small L6
 U 1 1 5936CC12
 P 6300 3350
-F 0 "L?" V 6250 3400 50  0000 L CNN
+F 0 "L6" V 6250 3400 50  0000 L CNN
 F 1 "10u" V 6250 3200 50  0000 L CNN
 F 2 "" H 6300 3350 50  0001 C CNN
 F 3 "" H 6300 3350 50  0001 C CNN
@@ -1602,10 +1602,10 @@ F 4 "DLV-121-M2.0" V 6300 3350 60  0001 C CNN "No."
 	0    -1   -1   0   
 $EndComp
 $Comp
-L L_Small L?
+L L_Small L8
 U 1 1 5936CF7D
 P 8350 3350
-F 0 "L?" V 8300 3400 50  0000 L CNN
+F 0 "L8" V 8300 3400 50  0000 L CNN
 F 1 "10u" V 8300 3200 50  0000 L CNN
 F 2 "" H 8350 3350 50  0001 C CNN
 F 3 "" H 8350 3350 50  0001 C CNN
@@ -1614,10 +1614,10 @@ F 4 "DLV-121-M2.0" V 8350 3350 60  0001 C CNN "No."
 	0    -1   -1   0   
 $EndComp
 $Comp
-L CP C?
+L CP C30
 U 1 1 5936D506
 P 6500 3100
-F 0 "C?" H 6525 3200 50  0000 L CNN
+F 0 "C30" H 6525 3200 50  0000 L CNN
 F 1 "22u" H 6525 3000 50  0000 L CNN
 F 2 "" H 6538 2950 50  0001 C CNN
 F 3 "" H 6500 3100 50  0001 C CNN
@@ -1625,10 +1625,10 @@ F 3 "" H 6500 3100 50  0001 C CNN
 	-1   0    0    1   
 $EndComp
 $Comp
-L CP C?
+L CP C36
 U 1 1 5936E4FB
 P 8150 3100
-F 0 "C?" H 8175 3200 50  0000 L CNN
+F 0 "C36" H 8175 3200 50  0000 L CNN
 F 1 "22u" H 8175 3000 50  0000 L CNN
 F 2 "" H 8188 2950 50  0001 C CNN
 F 3 "" H 8150 3100 50  0001 C CNN
@@ -1636,10 +1636,10 @@ F 3 "" H 8150 3100 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C32
 U 1 1 5936ED37
 P 6700 3100
-F 0 "C?" H 6725 3200 50  0000 L CNN
+F 0 "C32" H 6725 3200 50  0000 L CNN
 F 1 "100n" H 6725 3000 50  0000 L CNN
 F 2 "" H 6738 2950 50  0001 C CNN
 F 3 "" H 6700 3100 50  0001 C CNN
@@ -1647,10 +1647,10 @@ F 3 "" H 6700 3100 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L C C?
+L C C35
 U 1 1 5936EFE5
 P 7950 3100
-F 0 "C?" H 7975 3200 50  0000 L CNN
+F 0 "C35" H 7975 3200 50  0000 L CNN
 F 1 "100n" H 7975 3000 50  0000 L CNN
 F 2 "" H 7988 2950 50  0001 C CNN
 F 3 "" H 7950 3100 50  0001 C CNN
@@ -1695,10 +1695,10 @@ Wire Wire Line
 	7350 2900 7350 2950
 Connection ~ 7350 2900
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR040
 U 1 1 59370561
 P 7350 2950
-F 0 "#PWR?" H 7350 2750 50  0001 C CNN
+F 0 "#PWR040" H 7350 2750 50  0001 C CNN
 F 1 "GNDPWR" H 7350 2800 50  0000 C CNN
 F 2 "" H 7350 2900 50  0001 C CNN
 F 3 "" H 7350 2900 50  0001 C CNN
@@ -1707,10 +1707,10 @@ F 3 "" H 7350 2900 50  0001 C CNN
 $EndComp
 Connection ~ 5750 4850
 $Comp
-L R R?
+L R R11
 U 1 1 5937135E
 P 5950 3700
-F 0 "R?" V 6030 3700 50  0000 C CNN
+F 0 "R11" V 6030 3700 50  0000 C CNN
 F 1 "1k" V 5950 3700 50  0000 C CNN
 F 2 "" V 5880 3700 50  0001 C CNN
 F 3 "" H 5950 3700 50  0001 C CNN
@@ -1728,10 +1728,10 @@ Wire Wire Line
 Wire Wire Line
 	6700 3600 6700 4650
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR041
 U 1 1 59371B67
 P 6700 4650
-F 0 "#PWR?" H 6700 4450 50  0001 C CNN
+F 0 "#PWR041" H 6700 4450 50  0001 C CNN
 F 1 "GNDPWR" H 6700 4500 50  0000 C CNN
 F 2 "" H 6700 4600 50  0001 C CNN
 F 3 "" H 6700 4600 50  0001 C CNN
@@ -1744,10 +1744,10 @@ Wire Wire Line
 	6050 5850 5750 5850
 Connection ~ 5750 5850
 $Comp
-L R R?
+L R R12
 U 1 1 593721CE
 P 6250 4100
-F 0 "R?" V 6330 4100 50  0000 C CNN
+F 0 "R12" V 6330 4100 50  0000 C CNN
 F 1 "1k" V 6250 4100 50  0000 C CNN
 F 2 "" V 6180 4100 50  0001 C CNN
 F 3 "" H 6250 4100 50  0001 C CNN
@@ -1762,10 +1762,10 @@ Connection ~ 6700 4000
 Wire Wire Line
 	7950 4250 7400 4250
 $Comp
-L R R?
+L R R13
 U 1 1 59372F7C
 P 7250 4250
-F 0 "R?" V 7330 4250 50  0000 C CNN
+F 0 "R13" V 7330 4250 50  0000 C CNN
 F 1 "1k" V 7250 4250 50  0000 C CNN
 F 2 "" V 7180 4250 50  0001 C CNN
 F 3 "" H 7250 4250 50  0001 C CNN
@@ -1784,10 +1784,10 @@ Wire Wire Line
 Wire Wire Line
 	8100 4450 7400 4450
 $Comp
-L R R?
+L R R14
 U 1 1 5937350B
 P 7250 4450
-F 0 "R?" V 7330 4450 50  0000 C CNN
+F 0 "R14" V 7330 4450 50  0000 C CNN
 F 1 "1k" V 7250 4450 50  0000 C CNN
 F 2 "" V 7180 4450 50  0001 C CNN
 F 3 "" H 7250 4450 50  0001 C CNN
@@ -1800,10 +1800,10 @@ Wire Wire Line
 	6500 4450 6500 3700
 Connection ~ 6500 3700
 $Comp
-L +12V #PWR?
+L +12V #PWR042
 U 1 1 5937422B
 P 6100 3300
-F 0 "#PWR?" H 6100 3150 50  0001 C CNN
+F 0 "#PWR042" H 6100 3150 50  0001 C CNN
 F 1 "+12V" H 6100 3440 50  0000 C CNN
 F 2 "" H 6100 3300 50  0001 C CNN
 F 3 "" H 6100 3300 50  0001 C CNN
@@ -1811,10 +1811,10 @@ F 3 "" H 6100 3300 50  0001 C CNN
 	1    0    0    -1  
 $EndComp
 $Comp
-L -12V #PWR?
+L -12V #PWR46
 U 1 1 59374872
 P 8550 3400
-F 0 "#PWR?" H 8550 3500 50  0001 C CNN
+F 0 "#PWR46" H 8550 3500 50  0001 C CNN
 F 1 "-12V" H 8550 3550 50  0000 C CNN
 F 2 "" H 8550 3400 50  0001 C CNN
 F 3 "" H 8550 3400 50  0001 C CNN
@@ -1834,10 +1834,10 @@ Wire Wire Line
 Wire Wire Line
 	7950 3850 7950 4250
 $Comp
-L JACK_TRS_6PINS J?
+L JACK_TRS_6PINS J3
 U 1 1 593770B0
 P 9450 3850
-F 0 "J?" H 9450 4250 50  0000 C CNN
+F 0 "J3" H 9450 4250 50  0000 C CNN
 F 1 "JACK_TRS_6PINS" H 9400 3550 50  0000 C CNN
 F 2 "" H 9550 3700 50  0001 C CNN
 F 3 "" H 9550 3700 50  0001 C CNN
@@ -1845,10 +1845,10 @@ F 3 "" H 9550 3700 50  0001 C CNN
 	-1   0    0    1   
 $EndComp
 $Comp
-L R R?
+L R R15
 U 1 1 59377722
 P 8550 3650
-F 0 "R?" V 8630 3650 50  0000 C CNN
+F 0 "R15" V 8630 3650 50  0000 C CNN
 F 1 "5" V 8550 3650 50  0000 C CNN
 F 2 "" V 8480 3650 50  0001 C CNN
 F 3 "" H 8550 3650 50  0001 C CNN
@@ -1856,10 +1856,10 @@ F 3 "" H 8550 3650 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L R R?
+L R R16
 U 1 1 59377880
 P 8550 3850
-F 0 "R?" V 8630 3850 50  0000 C CNN
+F 0 "R16" V 8630 3850 50  0000 C CNN
 F 1 "5" V 8550 3850 50  0000 C CNN
 F 2 "" V 8480 3850 50  0001 C CNN
 F 3 "" H 8550 3850 50  0001 C CNN
@@ -1890,10 +1890,10 @@ NoConn ~ 9050 3750
 NoConn ~ 9050 3950
 NoConn ~ 9050 4150
 $Comp
-L GNDPWR #PWR?
+L GNDPWR #PWR043
 U 1 1 59378761
 P 8700 4150
-F 0 "#PWR?" H 8700 3950 50  0001 C CNN
+F 0 "#PWR043" H 8700 3950 50  0001 C CNN
 F 1 "GNDPWR" H 8700 4000 50  0000 C CNN
 F 2 "" H 8700 4100 50  0001 C CNN
 F 3 "" H 8700 4100 50  0001 C CNN
@@ -1905,10 +1905,10 @@ Wire Wire Line
 Wire Wire Line
 	8700 4050 9050 4050
 $Comp
-L R R?
+L R R8
 U 1 1 593591E4
 P 4300 5850
-F 0 "R?" V 4380 5850 50  0000 C CNN
+F 0 "R8" V 4380 5850 50  0000 C CNN
 F 1 "500" V 4300 5850 50  0000 C CNN
 F 2 "" V 4230 5850 50  0001 C CNN
 F 3 "" H 4300 5850 50  0001 C CNN
@@ -1916,10 +1916,10 @@ F 3 "" H 4300 5850 50  0001 C CNN
 	0    1    1    0   
 $EndComp
 $Comp
-L R R?
+L R R7
 U 1 1 593593A7
 P 4200 5200
-F 0 "R?" V 4280 5200 50  0000 C CNN
+F 0 "R7" V 4280 5200 50  0000 C CNN
 F 1 "500" V 4200 5200 50  0000 C CNN
 F 2 "" V 4130 5200 50  0001 C CNN
 F 3 "" H 4200 5200 50  0001 C CNN
@@ -1934,4 +1934,57 @@ Wire Wire Line
 	3900 5850 4150 5850
 Wire Wire Line
 	4450 5850 4650 5850
+$Comp
+L CONN_01X03 J4
+U 1 1 5935D2F8
+P 1700 6850
+F 0 "J4" H 1700 7050 50  0000 C CNN
+F 1 "CONN_01X03" V 1800 6850 50  0000 C CNN
+F 2 "" H 1700 6850 50  0001 C CNN
+F 3 "" H 1700 6850 50  0001 C CNN
+	1    1700 6850
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	4050 6450 4050 6550
+Wire Wire Line
+	1900 6450 4050 6450
+Wire Wire Line
+	1900 6450 1900 6750
+Wire Wire Line
+	1900 6850 2100 6850
+$Comp
+L +5V #PWR044
+U 1 1 5935DF04
+P 2100 6850
+F 0 "#PWR044" H 2100 6700 50  0001 C CNN
+F 1 "+5V" H 2100 6990 50  0000 C CNN
+F 2 "" H 2100 6850 50  0001 C CNN
+F 3 "" H 2100 6850 50  0001 C CNN
+	1    2100 6850
+	1    0    0    -1  
+$EndComp
+NoConn ~ 1900 6950
+Wire Wire Line
+	3000 6550 3000 6450
+Connection ~ 3000 6450
+$Comp
+L D_Schottky D1
+U 1 1 5935E5FB
+P 3500 6850
+F 0 "D1" H 3500 6950 50  0000 C CNN
+F 1 "D_Schottky" H 3500 6750 50  0000 C CNN
+F 2 "" H 3500 6850 50  0001 C CNN
+F 3 "" H 3500 6850 50  0001 C CNN
+	1    3500 6850
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	3000 7150 3500 7150
+Wire Wire Line
+	3500 7150 3500 7000
+Connection ~ 3000 7150
+Wire Wire Line
+	3500 6700 3500 6450
+Connection ~ 3500 6450
 $EndSCHEMATC