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Related documents that can be sharedhttps://github.com/armtronix/NodeMCU_four_relay_board
if you are using esp-01(blue colour pcb) or a very old esp yaa it resets as there is no bypass cap if you want to prevent it on esp 01 cut the reset pin and solder a cap 0.1uf to reset pin and ground of esp01 . If not try using rc snubbers across the load ideally for ac loads 0,01 Ac cap with some 30-40 E resistor
Sure what do you need .May be this is what youare look for https://www.youtube.com/watch?v=hAExD6KhHcg
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