off the shelf Relay or project ?

Thread Starter

ob2s

Joined Mar 18, 2009
2
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
 

Thread Starter

ob2s

Joined Mar 18, 2009
2
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
 

KL7AJ

Joined Nov 4, 2008
2,229
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
Yep...what we used to call a "dropout relay" in the broadcast biz

eric
 
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