Customer’s impression:
Excelente funciona Simple to use Bom Controlador
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  • Easy to use device for separate your micropocessor from the rest on circuit

    posted by richardfabo on 04/09/2014

    Involvement:Expert (understands the inner workings) - Ownership:more than 1 month


    It's easy to use, when you know, where should be connected what. It comes without scheme, but connection is easy:
    VCC + GND = +12V DC and GND
    IN1 .. IN4 = your 5V outputs from microcontroller
    COM = your GND from microcontroller
    GND = the same as 12 V GND

    Note: there is a jumper for connecting COM (=microcontroller GND) and GND (=12V source GND), to have the same potential. But this is not needed, when disconnected, the circuit of microcontroller and other 12V circuit are isolated (unless there is any other connection)...

    Other pros: red LEDs showing state of relais (on/off), one LED is ON when 12V DC supply is present.


    Not everybody likes pinhead connectors, maybe using any terminals can be welcomed.


    It solid and good contruction, also soldering is nice and proper.
    The faulty relay can be easily replaced.


    Worthy to buy.
    Cheaper than buy the parts anf build by yourself.

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