Price and achievement are correct

Price and achievement are correct

4 Channel 5V Relay Module Relay module for Arduino TTL logic
Buy at Amazon.com

Customer Review

Works flawlessly.
Everything clean and clear labeling.
Processing is also very good.
All controlled via optocouplers.
Relays very quiet.

How to Use
- You have to remove the jumper
- To pin JD-VDD commitment 5V (powered relay)
- To the VDD pin commitment 3.3V (supplied diode in optocoupler series resistor is already there)
- The relays switch
- The relay is energized when the switching input is (IN1 or IN2) pulled to ground (GPIO pin on Pi to 0)

Who can make this money itself already.

I can only highly recommend it.

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