Re: Constructing a "Power on time delay relay" with 5 sec. delay. max 6V

That sounds great.
If I have understood it correctly that is ;).
Correct me if I´m wrong: When power is switched on the the current
will flow through the 7555 (and therefore through the base of the
transistor) and the coil. The coil will act as an electromagnet
"shutting of" the rest of the circuitry by pulling away the common
terminal (COM?).
When the 7555 times out power will stop flowing through the coil and
start flowing through the rest of the circuit!

Sounds like just the thing ive been looking for.
A couple of questions arise:
1. How do i set the 7555 to time out after 5 sec?
2. The closest thing i found att my components shop is something they
call "ICM 7555" would that be what your thinking of? (do you know what
ICM stands for?)
3. What is the diode doing in the circuit?
4. Is the "[4.7µF]" a capacitator?
5. What does NO and NC to the right of the circuit stand for?

Phew, I think I´m running out of questions for the moment ;).
Thanks a lot (and again for your patience, if this project works I sure
will have learned a lot from it :).

/David

.

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