Thread: can anyone design a pulse circuit......

This should serve you right.

I made it myself too it is fully functional and a breeze do make. Not my design!

thanks, but I allready have a shutdown controller, i just want a circuit that when powered up with 12v closes a transistor for about a second then off again - according to the simulator the below image will work - but I would have thought it could be done simpler with a few caps and resistors?
James

Originally Posted by Jamez_Warner

thanks, but I allready have a shutdown controller, i just want a circuit that when powered up with 12v closes a transistor for about a second then off again - according to the simulator the below image will work - but I would have thought it could be done simpler with a few caps and resistors?
James

Just put the 10uf cap in the holes. round is minus and square is plus.

-Jeff

i have ( works ), but of course we have hit the problem of it malfunctioning when I turn computer back on before timer has expired
James

This site should get you going.

http://www.the12volt.com/relays/page5.asp

This site should get you going.

http://www.the12volt.com/relays/page5.asp

Wow...didnt know someone can even think of using 5 relays just to do something very simple. He must have lots of spare relays.

Its an interesting page though

thanks ricky that's perfect - I have formed the following diagram:

this means with jeff's shutdown controller - it will give a power on pulse everytime the pc recieves power so you can't lose sync by turning key again while the timer to shutdown is still counting... ( ppl with jeff's controller will understand )

Jamez_Warner

I think you supposed to thanks someone else

lol