Unlatch single coil 5v Relay and control it with Arduino

Discussion in 'The Projects Forum' started by markymul, Mar 25, 2014.

  1. markymul

    Thread Starter New Member

    Mar 25, 2014
    1
    0
    Hi,
    I'm trying to turn on my radio by sending a pulse from my arduino to a latching relay. The radio is powered by a 9volt battery. So basically I want the arduino to send a pulse to the relay which will make the relay latch and thus turn the 9volt battery on.

    The Relay I am using is the Omron G6EU-134p. It is a 5v single coil latching relay. At the moment there is a connection between pins 7 and 12 but I do not know how to make this unlatch and therefore make a connection between pins 7 and 10?

    I don't know how to unlatch the relay and I'm unsure as to how I should build this circuit? ie should pin 12 of the relay go to the 9v radio battery & pin 10 to gnd? Please see attatched pin layout of the relay.

    Thanks in advance,
    Mark
     
  2. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
    315
    Reverse polarity for latch/unlatch. (set/reset)

    What made you choose this relay?

    Dual coil set/reset seems a better choice.
    Or even a standard relay.
     
    Last edited: Mar 25, 2014
  3. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
    315
    Last edited: Mar 25, 2014
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,769
    969
    You cannot power a relay straight from the arduino either.. The pins cannot provide enough current. You need to construct a relay driver with a transistor or mosfet or optocoupler.
    Personally I would just use a regular relay and not a latching one too.

    And all you would need to do is cut the red wire from the battery to the radio.. Then attach the one cut end to pin 7 and the other cut end to pin 12.. thus breaking the power circuit with the relays contacts.
     
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