Prepare for v1.2

Browse Source

* 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.

...

This commit is contained in:

Mario Hüttel

2020-02-05 18:30:34 +01:00

parent ae4c0afbf9

commit fa6782c21d

5 changed files with 5480 additions and 7828 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download Patch File Download Diff File Expand all files Collapse all files

11652

reflow-oven-control-pcb.kicad_pcb

File diff suppressed because it is too large Load Diff