Help: count down timer

[radiomans]

Hi
Looking for some help with a count down timer for my uv exposer box
it needs a relay output so that when time has stoped it will switch off the tubes

Thankes in advance
Radiomans

 

[Hero999]

Use a 555 timer.

 

[mneary]

Go to the electrical department of your hardware store and look for spring-return timers made by Intermatic.

 

[radiomans]

Hi
Thanks guys got it sorted out now

Radiomans

 

[Hero999]

What did you use in the end?

 

[radiomans]

Hi
This is what i will be making

Its cheep and there is a pcb layout too

Thanks again
Radiomans

 

[Hero999]

That's a sensible solution.

Do you have a link to the origional or the source code?

 

[radiomans]

Hi
Heres the link http://www.geocities.com/b94_1999/index.htm

Radiomans

 

[Menticol]

Why you don't scrap a microwave oven timer? digital, reliable, beautiful! and fully programable, even if you wanna cook the box contents

 

[radiomans]

Hi
I think that the wife would have something to say if i took the
timer out of the microwave lol

Radiomans

 

[Menticol]

hahahaha she may take your balls in exchange of the timer! I suggest you to ask an oven repair shop or something like that