Everyone is missing that key word "trigger". I need to hit it with a
pulse and have it run for X-hours, then reset... and wait for the next
trigger.... maybe just a pile of 74HC283's

...Jim Thompson


Jim,

http://www.mcmaster.com/#additional-relays/=s9jqfn

Has 8 different timing functions. You could use the "Interval" function.
Apply power and it starts to time for the desired delay and then turns off.
To restart, re-apply power. Regardless, one of the other functions may work
better for your application.

I would suggest searching McMaster Carr, WW Grainger sites for a suitable
delay timer for the voltage and function you desire.

Mfg's that comes to mind Omron, SSAC, Omega, Veeder Root, Eagle Signal, etc
etc.

http://www.ssac.com/products.php?cat=22

Les