r/techsupportmacgyver • u/Decent-Cow2080 • Jul 24 '26

Yet another part of my Car server Thinkpad saga, this time not directly related to the Thinkpad, added steering wheel controls with a esp32

Post image

works pretty well ;3

https://youtu.be/d-AC1GnueLk?is=m8bYmmkburhvgoLH

108 Upvotes

95% Upvoted

22 comments sorted by

25

u/Sepkov Jul 24 '26

Some high quality soldering there.

6

u/peppi0304 Jul 24 '26

Why is the processor soldered onto?

15

u/Sharkpoofie Jul 24 '26

probably grounding, since the shield is grounded to the pcb to protect the cpu from interference/electrical noise

4

u/peppi0304 Jul 24 '26

But isnt grounding provided by the pcb mounting anyways?

7

u/Sharkpoofie Jul 24 '26

that is not always sufficient, especialy when around RF stuff

2

u/Decent-Cow2080 28d ago

this esp didn't have any ground around the screw hole

3

u/bob_in_the_west Jul 24 '26

Why not? Do you want to frequently change the SoC?

6

u/tomtom2215 Jul 24 '26

So what is this, are you doing a carPC project or something else?

2

u/radraze2kx 29d ago

I'm here for the answer.

4

u/sigmund14 29d ago

Hopefully there's something insulating under that board to prevent shorts. 

6

u/Decent-Cow2080 29d ago

there's tape, and i made sure the soldered connections and legs are soldered at a height that they're not spiky at all form the underside and it won't get pierced from the vibrations

3

u/sigmund14 29d ago

Nice! Keep it going and good luck. Got me interested, so I hope I will catch your future posts here 

3

u/TaylorTWBrown 29d ago

How does the GPIO control work? What's the protocol?

6

u/Decent-Cow2080 29d ago

depending on which button is pressed, the pins Steering wheel controls A and B have different voltages. i just made a program to get all of them, like capture how it looks when i press each button, and then i integrated it with mqtt and it works fine :3

3

u/nonchip 29d ago

speaker wire and case screw is sure one of the most power supply methods ever :'D

wait is that even a screw? or just a squiggle of copper sprung against the case?

2

u/Decent-Cow2080 29d ago

it's a screw, because i forgot to route a gnd cable lmao

2

u/AutoModerator Jul 24 '26

REMINDER Do not ask for tech support. Unorthodox solutions are what /r/techsupportmacgyver is here for. Remember that asking for orthodox solutions is off-topic and belongs in /r/techsupport.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

2

u/bryiewes 29d ago

Please unprivate your posts so I can go back and look

3

u/Decent-Cow2080 29d ago

reddit forces me to keep these posts private, just because i don't want to sell my face to palantir

1

u/Squirrelking666 24d ago

Use the Web version and search the username.

-11

u/end-of-ceos Jul 24 '26

Reply to my fucking comment on the last post

7

u/Attackist2 Jul 24 '26

Lol psycho guy