71beb1af39
Update buzzer footprint to include 3d model
2020-12-08 19:20:57 +01:00
e0fe68342c
Add additional VDD monitoring
2020-12-07 00:44:25 +01:00
aeb30f0e8b
Change 5V regulator to cheaper type
2020-12-06 20:18:50 +01:00
3ce57d6c53
Change components
2020-12-06 17:46:38 +01:00
c8b7802314
v1.3 finished preliminary layout
2020-12-05 18:58:28 +01:00
ffef1886d1
Improve layout
2020-11-27 23:23:40 +01:00
1375a5c914
Reannotate components
2020-11-27 22:26:34 +01:00
c932da7d41
First draft of v1.3 schematic and layout
2020-11-27 22:22:05 +01:00
e6905a50d2
remove onewire Temp sensor
2020-07-05 18:24:38 +02:00
b0ceb0adb7
Add 3d Models to repo
2020-07-05 18:17:55 +02:00
bcc4ae3126
Add git url
2020-02-18 20:51:03 +01:00
6f93679416
Add vias to erath net
2020-02-18 20:45:31 +01:00
c35760c5dd
Export gerbers with tented vias
2020-02-18 20:40:21 +01:00
e60811b49b
add GND points near test points to get good ground connection
2020-02-18 20:37:26 +01:00
3629ac7581
layout improvements
2020-02-18 20:25:29 +01:00
9da3edbf16
Re-enumerate components. This finilizes draft version for V1.2
2020-02-18 20:19:59 +01:00
c7b61d2e06
remove selectable voltage level for level shifter on LCB bus. This does not work
2020-02-18 20:12:22 +01:00
adf0a2afb9
Improve ESD protection of DIGIO Pins
2020-02-17 20:40:35 +01:00
f1897d8342
Improve schematic and corresponding layout
2020-02-16 00:10:01 +01:00
a67ada8ddf
Rework stability compensation of opamp
2020-02-06 21:36:27 +01:00
20780781e9
Replace all MCP6V31U with MCP6V34. It's cheaper.
2020-02-06 19:49:54 +01:00
daeb2a7721
Move vias to better locations: These vias have proven unfortunately placed for hand soldering
2020-02-05 22:12:31 +01:00
d894012b73
Re-annotate components
2020-02-05 18:58:36 +01:00
fa6782c21d
Prepare for v1.2
...
* Remove voltage buffer Opamp after TL431PK because it may oscillate
* Replace TL431PK with TL431LI. Stabilized by very large capacitance (> 10uF)
* Add panic passives to differential amplifier in order to avoid oscillaton. Values as they are now should work.
* Remove external ADC. Tests with version v1.1 show that the precision of the STM's ADC is sufficient, (once all oscillations are damped by modifying the circuit)
* Power whole OpAmp circuit with 3.3 volts in order to eliminate the need for the clamping diode at the ADC pin. This diode showed a high reverse current over temperature, which affected the measurement.
2020-02-05 18:30:34 +01:00
ae4c0afbf9
Improve layout, change color of B.Silk and improve schematic
2020-01-12 14:56:58 +01:00
103550b2da
Layout opamp changes. Remove INA126 and put in 3 standard opamps instead
2020-01-11 20:58:21 +01:00
f895e84418
fix sym lib table and refill zones
2020-01-04 20:52:22 +01:00
3c9929bcd6
Finalize version v1.0
2020-01-03 21:26:29 +01:00
6806a29e54
Add solder jumpers for connection between Earth and GND
2020-01-03 20:39:53 +01:00
cff848f02f
Small fixes and improvements
...
* Card detect pin used
* Fix SD card slot
* Improve routing and via placement
2020-01-03 18:34:21 +01:00
3bba68b615
Improve layout
2020-01-02 00:17:38 +01:00
2c4c15e72b
Replace custom opamp circuit with INA126 instrumentation amp
2020-01-02 00:08:09 +01:00
f415c9b838
Update transformer footprint
2019-12-29 23:40:30 +01:00
0559a624bc
Moved stuff
2019-12-27 21:36:56 +01:00
a307557a41
Improved layout, Add QR code, Add external ADC option for 22 bit ADC
2019-12-26 18:01:55 +01:00
fe646769e7
Schematic beautify and layout improvments, Length matching for SDIO
2019-12-25 19:15:32 +01:00
c8e420bd08
Played around
2019-12-25 01:19:01 +01:00
971a1e7c1a
Include light guides for LEDs
2019-12-25 00:36:35 +01:00
a698e0b0e5
Add temperature sensor to PCB for compensation calculation.
2019-12-25 00:20:13 +01:00
c211cf659b
Newest changes in schematic and a preliminary complete layout
2019-12-23 22:25:38 +01:00
585ef85fab
PCB rework started
2019-10-02 14:12:33 +02:00
93ec69fa19
Fisrt draft. Will be reworked
2019-09-22 18:42:43 +02:00
