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switch on delay circuit

D

Thread Starter

deoj

Joined May 9, 2011
1
Hello

guys can you help me start my project.
my project is Power on delay circuit
i need schematic and pcb layout for it

just a simple Power on delay circuit

any comments and suggestion is much appreciated :)
 
K

KMoffett

Joined Dec 19, 2007
2,918
For starters..Details...details...details!

What voltage are you intending to switch?
AC or DC?
How much current?
How long a delay

Ken
 
simo_x

simo_x

Joined Dec 23, 2010
200
If You want a power on after an N time delay, you can use a a simplest 555 monostable circuit to obtain a more precise delay.. At pin 3 you can connect a NPN inverter and then work with the inverter output, if you work with DC.
An RC network also would be usefull, but , if you use an NPN after it, you need to be more precise with voltage & time charge of capacitor to active the transistor..
 
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