My first project - ESP32-C3 + TCAN3404 + TFT SCREEN + 24V TO 3.3V

Saiti022
Posts: 1
Joined: Sun Apr 26, 2026 6:32 pm

My first project - ESP32-C3 + TCAN3404 + TFT SCREEN + 24V TO 3.3V

Postby Saiti022 » Sun Apr 26, 2026 6:57 pm

Guys,
I made my first "bigger" project ever. I would like to ask you if you see anything what will make it a not-working-garbage.
This is a small CAN-reader with TFT screen to print messages.

So what I have:
- 2x3P connector 3.0 MOLEX
- ESP32-C3FH4 as a "copy-paste" from documentation
- Antenna which I don`t really need but I`ve put it for further iterations (maybe)
- a 24V to 3.3V set on LMR36015SC3 - this is also a "copy-paste" from TI-WeBench
- USB port for programming
- Relay controlled from GPIO
- two buttons to operate the module

This is a project something like "I don`t know what I am doing but people make people so why not to try?"

I hope the power section and power lines have no mistakes, TCAN3404 is made like in documentation. Screeen is connected 1:1 from documentation. I just don`t know about GPIO`s - some of them are strapping pins (like TFT_SDA) but I pulled it up with 10k res. It was a ChatGPT suggestion. ChatGPT also says that the 100ohm resistor R21 will not allow to move the coil in relay, Gemini says this will work, so I have a conflict here.

Please don`t judge me I am using AI for desings, not to "save money" and not giving it to a professional developer, I just have a lot of fun doing it.

Do you see any mistakes here?

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