Hi all,
I would like to do the follow - which seems easy in principle, but I am stuck on one part:-
I'd like to have a relay close when 12v is applied but then to open again after approx 2-3 secs, and stay open even with the 12v still applied - I'd like to reset the relay to allow it to close again only when the 12v supply has been lost.
I have been reading up on delay relays but from what I understand these would either
a) keep opening and closing the relay (with the time delay) while the supply is active.
b) close the relay and then only open again once supply is lost + time delay
Have I understood this correctly ?
Is it even possible to get the desired setup ?
If it makes things clearer - Its to activate a digital switch to turn something on when another device powers up. Hence if the digital switch is held closed for more than about 3 secs the device will turn back off.
Thanks.
I would like to do the follow - which seems easy in principle, but I am stuck on one part:-
I'd like to have a relay close when 12v is applied but then to open again after approx 2-3 secs, and stay open even with the 12v still applied - I'd like to reset the relay to allow it to close again only when the 12v supply has been lost.
I have been reading up on delay relays but from what I understand these would either
a) keep opening and closing the relay (with the time delay) while the supply is active.
b) close the relay and then only open again once supply is lost + time delay
Have I understood this correctly ?
Is it even possible to get the desired setup ?
If it makes things clearer - Its to activate a digital switch to turn something on when another device powers up. Hence if the digital switch is held closed for more than about 3 secs the device will turn back off.
Thanks.