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relay 4 channel Customers Reviews

  • A good product of a affordable price.

    posted by mrajda

    Product of a good quality. Its price is affordable. The size of this product is small enough so that it can be placed for example in small robots. It can drive motors or other high loads thanks to the 10A relays. There is full acces to both terminals of each relay: to one that is « normally open » and to the second that is « normally closed ». This feature is not common in other boards having only normally open terminal.This board has optocouplers ensuring a good isolation between the high voltage circuit and the low voltage system circuit. This ensures safety of the projects based for example on Arduino boards and Raspberry-Pi in which I am currently using it. This is a good idea of placing LEDs indicating current status of relays. The system bus power can be separated from the relay bus power simply using a jumper.
    I would like to have the 8-relay option and another version with 12V relays.
    Probably I will order more of this board.
  • Cheap power control board with relays.

    posted by algspd

    It is cheap for what it does (the board, relays, resistors, transistors, leds... are far more expensive than this board).It is very easy to use, for example, with an arduino to switch on-off a light bulb.
    The relays are a bit slow so dont use this for high-performance requiring projects.Leds may be annoying if you use this for lightning projects, but you can easily desolder them.
    Use this por power-management homemade projects.
  • Works fine

    posted by tylernt

    Standard 4-channel relay board. Has transistors for the relay coils, and flyback diode protection. Relays close on HIGH signal, just as you would expect.
    Board draws 3mA with no relays closed. Each relay coil draws about 80mA when activated. Red "power" indicator, green relay indicators.
    Not sure what more I can say about it? It's a standard 4-channel relay board.
  • Nice relay board with opticouplers for safety.

    posted by OgreRO

    It does work very easily and you do not need even a microcontroler to use it.Can handle 220V few amps as I need.
    You can use this for your home automation project to switch on some lights or any other apliance like a water pump for your automatic watering system.
    I definitely reccomend this over the one without optocouplers for higher safety. If you considering do not hesitate and buy it. It is cheap.
  • Solid piece of kit

    posted by mattura

    A good quality build, which is solidly constructed. There are LEDs to show power and when each relay is switch on. It has a nice 'click' when the relays toggle. It works out of the box with arduino nano and other devices I'm sure. You can connect to outputs Normally Open or use the other slot for Normally Closed
    Also good that four screw holes are drilled to attach it to something.
    A good cheap set of 4 relays, easy to connect and use.

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