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Arduino 5v relay module ky-019 Led bulbs dc ohm resistor watt parallel leds need Led 5v 3v 12v connect power pci box
Ky-019 5v relay module .
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KY-019 5V Relay Module - ArduinoModulesInfo
Arduino 5V relay module KY-019 - Steps2Make
LED as a DC Bulbs - CR4 Discussion Thread