hi guys
i use this power board for esp32 wroom with fingerprint , DS1307 to control relay
https://vi.aliexpress.com/item/33053783 ... pt=glo2vnm
i wrote the code on arduino ide and it worked
But after a period of time, the circuit is unstable, the relay output device is flickering
I think the 7805 ic takes a long time to get hot. so i think i will change to ic lm2596 with schematic new
please help me to check if the power supply is wrong. I'm not good at English
thanks
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