Need Help...out of idea

Thread Starter

KK1980

Joined Nov 26, 2008
3
Hi,
I would like to design relay timer circuit using 555 timer and 12V relay. I want my design to be in such criteria:

Requirement:

First I will set the timer (for exampe 10s). Then I turn on the power (the 12V). After 10s, the relay will switch from (NC) to (NO) and stay in such a condition. The relay will only switch back to NC when I turn off the power.

Anyone got any idea how to design this circuit. Can it be achieved using 555 timer or need other IC? Please advice.
Thanx.

Nick
 
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