Uploaded April 2023 | Updated September 2026, 4 days ago
My first custom relay boards using ESPNow
I am doing a somewhat ambitious art project where I need 1 master esp32 and 6 slave esp32s controlling 2 relays each for a 12V load.
The wiring got ugly and i decided designing a pcb would be faster and prettier than soldering up 6 proto-boards.
It's pretty awesome how gpt4 told me the model numbers for appropriate transistors, flyback diodes, and base resistors (I have never done a project with non-LED diodes, transistors, or bare relays).
The relays need 5 V to charge the coil but they play nice with a 3.3 V signal, and I don't need to mess around with a level shifter the way I typically do.
I finally figured out how to hardware deounce buttons, which eliminates potential error from my software debouncing.
Next step is to learn how undervoltage protection works for some inexpensive dewalt-style 12V batteries works.
Lastly, the master esp will connect over i2c to a raspi running opencv depth ai and a custom image classifier.
Fun fun fun
My first custom relay boards using ESPNow
I am doing a somewhat ambitious art project where I need 1 master esp32 and 6 slave esp32s controlling 2 relays each for a 12V load.
The wiring got ugly and i decided designing a pcb would be faster and prettier than soldering up 6 proto-boards.
It's pretty awesome how gpt4 told me the model numbers for appropriate transistors, flyback diodes, and base resistors (I have never done a project with non-LED diodes, transistors, or bare relays).
The relays need 5 V to charge the coil but they play nice with a 3.3 V signal, and I don't need to mess around with a level shifter the way I typically do.
I finally figured out how to hardware deounce buttons, which eliminates potential error from my software debouncing.
Next step is to learn how undervoltage protection works for some inexpensive dewalt-style 12V batteries works.
Lastly, the master esp will connect over i2c to a raspi running opencv depth ai and a custom image classifier.
Fun fun fun
