In message <39F5B7EA.D09BF809@gte.net>you write:
>
>I need help figuring out what parts I need to do this:
>- initially pass current (12v, <20amps)
>- stop the flow of current after 5-10 seconds
>- preferably not flow again until power is turned off and back on
>(staying off for 5-10 seconds would be okay).
>
>I'm thinking of a slow, silent turn signal flasher (but preferably one
>that would only flash once without a reset).
>
>Easy to do, hard to do? What parts do I need and how must they be
>arranged?
>
You will need a couple of transistors, 12V relay, and a 555 timer.
The timer should be configured as a monostable or one shot timer.
The first transistor will act as a trigger for the timer and the
timer will engerized the relay via the second transitor.
Ofcourse, you will need some resistors, diode, capacitors and a variable
resistor to adjust the timing. If you need help in designing the circuit
just give me a shout. I've done very similar circuits before.
Dave |\ | | |
_______________________________________/\ /\ /\_____| \|_____| |____________
Dave Chu \/ \/ | /| | |
Dept. of Elec. & Comp. Eng. |/ | | |
Concordia University Voice:(514)848-3115 Fax:(514)848-2802
1455 de Maisonneuve W. H961 Email:dave@ece.concordia.ca
Montreal, Quebec, Canada H3G 1M8 http://www.ece.concordia.ca/~dave/addr.html
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