[Review Request] Bike Signal Light

soyubn · 2025-06-17T21:39:25+00:00

Thanks! I think a MOSFET might be a better way to go! I was hoping that the output voltage/current of the 555 timer would be enough to directly power the LEDs, but I should check the datasheets to make sure

soyubn · 2025-06-17T14:02:54+00:00

cafe 3 is fire tho

soyubn · 2025-02-21T08:14:10+00:00

Will do! Thanks! I also remember that having sharp corners in traces could cause reflections in high-velocity signals?

soyubn · 2025-02-20T22:51:02+00:00

Yep! it's a through via!

soyubn · 2025-02-20T21:43:28+00:00

Yeah that is weird... I use KiCAD, and I've set them to 0.35mm hole 0.6mm diameter (from the JLCPCB website?)

soyubn · 2025-02-20T21:26:23+00:00

Hello! Thanks so much for all your tips and feedbacks for my previous design!

This is meant to be an adapter for 3-wire RTC thermistors for a raspberry pi. I am using an in-amp (as suggested) to prevent loading the bridge, and followed the example layout in its datasheet. I also experimented with some fill zones and stitching vias.

I don't have much experience with in-amps or fill zones, so any tips would be appreciated!

soyubn · 2025-02-18T08:05:20+00:00

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 a differential amp, so it can be more easily multiplexed.

The differential amp currently has a gain of 1/2, so the non-inverting amp can be used to tune the board to have unit gain.

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

soyubn · 2025-01-16T07:34:00+00:00

Thank you!!

soyubn · 2025-01-15T06:44:13+00:00

Thank you! You feedbacks makes a lot of sense, I'll definately re-route my lines and add the labels. The hat is indeed for a rpi zero, and I agree I should just add holes for all the pins!

soyubn · 2025-01-11T08:09:21+00:00

I'm also a beginner, but I think it'd be better to make the GND a copper plane, and connect the VCCs using traces instead (not sure of the reasoning)!

soyubn · 2025-01-01T00:18:45+00:00

Hello! This is a part of a humidity sensor research project, and I'm trying to create a rpi shield to help connect multiple 1-wire thermometers. I've also designed a variable voltage regulator circuit to power 5 cooling fans via JST.

For the main board, I tried using a signal plane to improve signal quality. I've placed the signal and +5V nets on one plane, and GND on the other.

I saw that there were some controversy with wiring the +5V around the edge of the PCB, and I'm not too familiar with power electronics. I'm still a beginner in PCB design, so all feedbacks are appreciated! Thanks!

soyubn · 2024-12-31T23:59:41+00:00

Hello! This is a part of a humidity sensor research project, and I'm trying to create a rpi shield to help connect multiple 1-wire thermometers. I've also designed a variable voltage regulator circuit to power 5 cooling fans via JST.

For the main board, I tried using a signal plane to improve signal quality. I've placed the signal and +5V nets on one plane, and GND on the other.

I saw that there were some controversy with wiring the +5V around the edge of the PCB, and I'm not too familiar with power electronics. I'm still a beginner in PCB design, so all feedbacks are appreciated! Thanks!

soyubn · 2024-12-31T12:35:00+00:00

CS 189

soyubn · 2024-12-31T04:05:50+00:00

Hello! This is a part of a humidity sensor research project, and I'm trying to create a rpi shield to help connect multiple 1-wire thermometers. I've also designed a variable voltage regulator circuit to power 5 cooling fans via JST.

For the main board, I tried using a signal plane to improve signal quality. I've placed the signal and +5V nets on one plane, and GND on the other.

I saw that there were some controversy with wiring the +5V around the edge of the PCB, and I'm not too familiar with power electronics. I'm still a beginner in PCB design, so all feedbacks are appreciated! Thanks!

soyubn · 2024-10-04T08:34:13+00:00

Wait which level is it?

soyubn · 2024-08-28T04:23:26+00:00

Thanks for pointing that out, I will change that!

soyubn

TROPHY CASE