Electronics > Beginners

ESP32 relay board, voltage supply questions

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Kaisha:
This is what I did for the relays:

Psi:
Could also put like a 100uF capacitor across the relay coil to further smooth out any voltage spikes.
But its probably not needed.

Make sure your ESP32 power rail has some nice bypass caps close to the chip.

Kaisha:
I have a 22uF and a 100nF across the ESP32 GND/VDD33 pins (those values are what they specified in the data sheet for the ESP32).

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