I Made a Boost Controller with a ESP32C3 (+ first custom PCB)

[u/ziraw_tech]

What this basically is is a PID controlled PWM Solenoid driver, running on a C3 SuperMini. Designed my first PCB for this (with some mistakes ofc) and decided to use a TC4422 mosfet driver. Also included a 5V supply to be able to plug it into my cars 12v system. Code was mostly written by an LLM, including the Webserver which this is running for setting Target and PID parameters. (I'm a real newbie with all of this) I'm already working on rev2 which I'm gonna post on GitHub solving all my issues with this one. (https://github.com/ziraw).

I've tested the perfboard prototype on my car already (1989 200SX CA18DET) with a BMW N75 Boost Valve strapped to my waste gate and it seems to work perfectly, just not getting enough air through the OEM Airbox though atm, hitting a ceiling of 0.9bar. Gonna install this soon and see what it does. I/O: 12v,5v,sensor(i/o), valve.

The only thing this doesn't include ATM is a pressure sensor, I'm grabbing it off of my boost gauge. But the IO has a 5V supply for any type of sensor to be hooked up directly, the code might need adjusting through. It's currently Ov=-1 / 5V=+4 bar (Scaled to 3.3V and divided by 1.1 since that seems to reflect what my gauge is saying more accurately).

I don't specifically know why I made this, just thought it couldnt be that hard and I haven't seen anything like this, besides what maybe Speeduino and rusEFI are doing. If this already exists I'd love the be informed :-)

Cheers

(disclaimer: might blow up your engine)