Building timer circuit

Thread Starter

98QuadCabV10

Joined Oct 20, 2012
12
I’m trying to build a timer circuit that would be off for about and hour maybe 2hrs and on for 5 mins. This will power either a 9 volt dc relay or a 24vac relay. Can anyone point me in the right direction of what I could use to build it? In the past I’ve used 555 timers but I’ve never tried to program it for anything over a few seconds.

Thanks
 

dl324

Joined Mar 30, 2015
12,871
What are your restrictions on solution space? If the off time can be variable, a microcontroller solution would be the easiest solution.

This will power either a 9 volt dc relay or a 24vac relay.
What do you mean by this? Are you talking about the coil or the contacts?
 

Thread Starter

98QuadCabV10

Joined Oct 20, 2012
12
The contacts of the relay will only have 9-24 volts running through it.
This is to power a small solinoid valve. Thank you for your help. I wasn’t set on building it myself. From the research I did I couldn’t find anything that would work. That programmable timer should work perfectly for what I need.

Thanks again for your help.
 

AnalogKid

Joined Aug 1, 2013
9,257
First, there are a ton of timer modules on ebay that are cheap, programmable, and cheap. But ...

Second, do you really want to build something (which I highly support) or just get something done - which means Amazon / ebay / Walmart. A plug-in lamp timer that switches AC power to a wall wart will do what you want.

ak
 
Top