off the shelf Relay or project ?

Discussion in 'General Electronics Chat' started by ob2s, Mar 18, 2009.

  1. ob2s

    Thread Starter New Member

    Mar 18, 2009
    2
    0
    Hi,
    I need a 12 volt relay that has a momentary (on and off) action once the 12 volts applied and then that same momentary action once the 12 volts is removed ? The 12 volts is on and off as my stereo is turned on and off, the momentary switching action would turn on a PC from hibernation and then back to hibernation. Currently the PC is hard powered off and on which has disk damaging possibilities already experienced. :mad:

    Can I buy something like that or rig it up ?

    Thanks
     
  2. ob2s

    Thread Starter New Member

    Mar 18, 2009
    2
    0
    I guess I could have a pair of relays in series
    one that is Normally open with a 1-2 sec delay upon coil de-energization
    and
    one that is Normally closed with a 1-2 sec delay upon coil energization

    are there relays like that ?

    Thanks
     
  3. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,040
    287
    Yep...what we used to call a "dropout relay" in the broadcast biz

    eric
     
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