[PCB review] wheatstone bridge for 3-wire RTC

Hello! This is meant to be an adapter for 3-wire RTC thermistors for a raspberry pi. The idea is to convert the bridge voltages into a single output signal using an in-amp, so it can be more easily multiplexed.

Since I’m not sure if I need the automatic discharge on the voltage regulator, I’ve used two 0 ohm jumper resistors so I can change it later.

I’m still learning the rules of PCB design, so any help & feedback would be appreciated! Thanks!

(I’m still figuring out how to use a 3-wire wheatstone bridge, but hopefully the hardware is correct enough that I can figure out the math later…)

The schematic is attached to this google drive

This forum is primarily aimed at helping KiCad users with KiCad specific questions, there are other more general electronics forums that are better suited to this kind of question.

2 Likes

Oh thanks for letting me know! My apologies!

If you will have a problem that something in KiCad don’t works as you expected or you know what you want to reach (at schematic or PCB) but don’t know how or how to understand some KiCad Errors/Warnings in ERC or DRC - feel free to ask here.
PCB reviews also happens here (even are not welcome), but it looked that you mainly asked about automatic discharge what has nothing to do KiCad and even with PCB.
Read also:

to find what you need to do to promote yourself to be able to post more pictures in a post.

P.S.
I don’t know what RTC (Real Time Clock) termistor is.

Thanks for letting me know. As the other user pointed out, I didn’t know this forum didn’t focus on PCB reviews. I was asking for general PCB design advice, with a clarification on the jumper resistors.

Also the RTC was a typo! I meant RTD thermistors

1 Like

For me:

Is not a question.
You just tell us that you have made some schematic decision. Your right.

It’s completely unclear what kind of information about KiCad or PCB you’re missing.

I’m using 0Rs for two purposes:

  • to have variant schematic (your case),
  • to cross tracks without making holes in continuous GND zone.

I’m just fixed (may be too much) on having GND zone without any holes.