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arduino 4 channel Customers Reviews

  • Good product at a very interesting price

    posted by Ferraldo

    The main advantage of this product is that the input is optically insulated. This is particularly relevant for me as I need to connect the board to an expensive National Instruments I/O board. Beside this, the product is cheap, compact, and reasonably well assembled. It has good connectors and useful status LEDs.
    The board is packaged in an antistatic bag.
    Almost impossible to find this quality at this price.
  • 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.
  • I could not make this for the price

    posted by blazeit

    Good build quality. Good soldering and component placement.Small size and has mounting holes in the PCB.Driving circuit contains flywheel diodes to protect the transistors.The tracks are well insulated so there is a very low shock hazard when wired to mains voltage.It came packaged in an anti-static bag.
    I think the relays might be on the light side for switching heaters or motors that have a high initial current draw.
    Excellent product for the price.
  • Costs less than the individual components

    posted by spookydonut

    All the joints are well soldered, no dry or cracked joints.Terminals for the relays are marked NO/NC on the silkscreening.The circuit design is pretty robust, with the external power supply for driving the relays, you only need a few milliamps to switch all the way up to 10A 250VAC or 30V DC.
    If you don't like or need this specific circuit and want to spin your own, expect to pay ~$20 for the relays alone.
    Use it or strip it for parts, either way this is a great value purchase.
  • Excellent value for money

    posted by Hendrik24051972

    This relay has an easy and understandable layout. It activates the relays on "high trigger", which I find useful for my applications.
    I wish I had bought the 8 Channel version instead of the 4 Channel. I'm using this one for 1 month, and I already have a destination for each of the 4 relays.I like this module, really works as designed.
    This is value for money. If you want relay functionality for your Arduino, then this is the relay-module you need.

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