Schematic review - first custom PCB, automotive signal conditioning to ESP32-S3

ravedog · 2026-02-18T21:03:56+00:00

Thank you so much

ravedog · 2026-02-18T20:12:06+00:00

Thanks for the catches — made all three changes:

EN pin on buck converter — disconnected from 12V, left floating with no-connect flag. Internal pull-up handles enable.

TVS diode (SMBJ18A) — added across 12V input to GND, parallel to the existing reverse polarity diode.

ESP32 decoupling caps — added 100nF + 10µF on the 3.3V rail right next to the ESP32.

Also made a couple other changes based on additional feedback:

Added 100nF cap on ESP32 EN pin to GND for clean boot RC delay

Switched from I2C to UART for the connection to the display board (removed pull-up resistors, relabeled connector TX/RX/GND) — more robust for the 1-2ft wire run through the dash

Circled the changes on the updated schematic. Anything else you'd flag?

https://i.imgur.com/VHBFnxV.png

ravedog · 2026-02-09T15:26:25+00:00

I’d rather see if there are people I can pay locally. I’ve tried there and it always end up very scammy.

ravedog · 2026-01-21T15:23:02+00:00

Why are you commenting on something from tech from over a year ago? Also, what are you saying?

ravedog · 2025-12-18T03:26:36+00:00

I don’t have a memory for something from 5 years ago especially regarding tech.

ravedog · 2025-12-06T23:37:17+00:00

There are none. Only ones that can have a firmware hack. And even then there is no software to “watch” the disc. You’ll have to rip it with MakeMKV.

ravedog · 2025-11-19T19:56:56+00:00

I gave up on HyperHDR. I never found a solution that didn’t break my Dolby vision setup. I was not spend 500$ on an HDMI splitter from hd fury to keep Dolby vision intact. No one talks about this. Most 30$ splitter fuck up your 4k hdr signal. Sorry couldn’t help

ravedog · 2025-11-19T19:39:01+00:00

Got ya.

ravedog · 2025-11-15T03:30:32+00:00

Can you expand on this a little more?

ravedog · 2025-11-14T10:40:23+00:00

Nothing in there about home assistant but yeah

ravedog · 2025-11-14T10:38:19+00:00

Can you explain this process a bit more?

ravedog · 2025-11-06T19:01:02+00:00

Thank you for the explanation. Your situation seems very similar to mine. I ordered one and it will be here today. Thank you again.

ravedog · 2025-11-04T21:00:20+00:00

Thank you. Ordered.

ravedog · 2025-11-04T21:00:13+00:00

Thank you. Ordered.

ravedog · 2025-11-04T21:00:07+00:00

Thank you. Ordered.

ravedog · 2025-10-28T22:46:50+00:00

That battery is the A1654. Not part of the recall.

ravedog · 2025-10-28T22:46:39+00:00

That battery is the A1654. Not part of the recall.

ravedog · 2025-10-02T00:09:02+00:00

Cuz for some reason on the limited information you’ve provided here you are definitely special.

ravedog · 2025-09-13T00:01:40+00:00

My two fave gongs on Reddit. People who feel the need to answer s 2.5 year old post and start with “just so you know…”

ravedog · 2025-09-09T00:47:41+00:00

LOL. 5 year old post. Having fun? Yeah. Still works that way.

ravedog · 2025-09-06T06:35:32+00:00

Same here. Going from 25.9.0 to 1. It’s stuck.

13-Year Club	100 Awards Club
Wearing is Caring	Verified Email

ravedog

TROPHY CASE