4 Channel 5V Relay Module Board ( $5.10 )

4 Channel 5V Relay Module Board

Main Features: Strong anti-interference Use optical isolation and diode freewheeling protection Relay trigger part uses dual-sided thickened cloth which is safe and reliable Use Songle relay of high quality and 5.08mm terminal Each relay has a ON / OFF indicator for easier working With installed screws IN1-IN4 is signal input trigger port; VCC1 is the single power supply port

4 Channel 5V Relay Module Board

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