Main > Main Forum
Simple 12v delay circuit?
(1/2) > >>
jimmy2x2x:
I was wondering if there is a simple circuit I could build to delay 12v from a pc power supply molex for 5 seconds when power is applied, after 5 seconds it should remain continuous.
boardjunkie:
A 555 timer circuit driving a relay (via transistor switch) should work fine.
jimmy2x2x:
excellent, could you translate into spazomatic for me please?

(uk parts links would be very welcome)

I have no idea!
Bender:
I don't know about making one but they make such a device for car custom a/v installs
can't remember what they're called off the the top of my head though, used one to delay the monitor coming on

ahh, here is the thread where I asked a similar question
WindDrake:
Here's my try at it, assuming my memory serves right!

10nF Cap - ECQ-V1H103JL
Diode on Relay - 1N4004
Relay - G5LE-1 DC12
BJT NPN Transistor - TIP29C
555 Timer - LM555C
4.7k Resistor (1/4 Watt, 5%) - Get it anywhere!
1000uF Capacitor - ECA-1EM102B

Here's the schematic. As with anything you see, check it for sanity! (I'm at work and rushed. :P)

Navigation
Message Index
Next page

Go to full version