Powering esp32 board from the 5V pin

[meneldor]

Hello,
I'm trying to power my board using HLK-PM01 220V to 5V power module.

20241215_130853.jpg (2.24 MiB) Viewed 1163 times

The board enters in bootloop if the PS is connected to the 5V pin. It works if powered from USB but ONLY if the PS is not connected to the 5V pin. Tried some caps on the PS output but didn't help.

[username]

What size cap did you put on the output of the HLK-PM01?
Data sheets says y 100-220 UF.

[meneldor]

Tried different-10,47,100,470uf. I suspect something is wrong with the 5v pin as it's the same when I tried a breadboard stable 5v power supply. It's strange because the USB is working.

[Bromium]

Try a different power supply - one that is sourced from batteries. Like 2S 18650 down converted to 5V.

I have even drained a 2S li-ion down to 7.0 V and successfully powered a 5V dev board without down conversion.

Do 7V at your own risk please.