DIY Light-Operated Switch Kit DIY Kit With 5V Relay LM393 Electronic Funny

Trigger mode and output mode. Set trigger mode by JMP1 It is DIY kit. User need to weld it. 　　 1-2: Relay is allowed to work. 　　 2-3: Relay is not allowed to work. Set output mode by JMP2 Ceramic capacitor.

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