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arduino relay module

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arduino relay module Customers Reviews

  • 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.
  • Relay module very useful and practical

    posted by elsantox

    - Quick start and really simple- Perfect performance- LEDs to indicate the status of each relay- The driving signal of each relay has a transistor to amplify what makes it possible to directly connect the output of a microcontroller without worrying about the current.- The output of each relay includes screw terminal blocks to facilitate the connection with different devices.- Each signal has an optical coupler which separates the low-power signal thereby protecting relay driver circuit.
    This module is quite interesting to control up to eight devices independently. Easily connectable to any microcontroller.
    For the price and functionality is a good module.
  • Does what it has to do

    posted by Bartjakobs

    This relay simply connects to a digital output of an arduino. When set to high, the relay will switch.
    It looks like the input has to be low (0v) to switch the relay, but I could be wrong. If you want to buy this and you won't find a manual or something, you should search for simple relay manuals and look what pins of the relay correspond to what pins on the module
    If you need to switch your light or hair dryer, this could be the solution!
  • Good product

    posted by bd89

    This is a good product. I suggest buying.
    This is a good product. I suggest buying. This card has two LEDs that indicate the status of the relays plus one LED that indicates whether the card is active or not. All the LEDs are red. The current required for the switch of the relay is less than 25 mAh therefore suitable for most of the microprocessors (certainly suitable for arduino). This card is suitable for all those situations in which a microprocessor must control of large loads, such as motors, lights or even the electric current of the wall.
    This is a good product. I suggest buying.
  • very good workin relay

    posted by dreezy

    his device works very well. I want to switch a filterpump from my swimmingpool with the k8055 (velleman-kit) and it works very well. I use an ordinary computer supply for the voltage i needed.I connected the 4 different pins as followed:vcc = 5V computersupplyGND = GND computersupplych1 -> clamp (K8055) even as ch2 (see also the website [http://zwembadforum.be/download/file.php?id=306]from the clamp to 5V a resistor from 2k2
    there are no other thougts..schematics to connect the K8055 and these relay board can be found at this websitehttp://zwembadforum.be/download/file.php?id=306
    everythings works fine. The relay is switching well unless there is any voltage on pen VCC. This means 1,8 - 5 V. If it is not, or the voltage is lower, the relay wil NOT switch.

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