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Arduino & Relay Wiring Diagram
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Arduino relay wiring diagramKy-019 5v relay module Relay lamp arduino module control 12v sms wiring via uno using gsm connect sim900 randomnerdtutorials re projects shield raspberry holderControl 12v lamp via sms with arduino.
Relay arduino voltage relays circuits .

DC 5V 9V 12V 24V Optocoupler isolation H/L Level Trigger 1-Channel

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Arduino & Relay Wiring Diagram