12 Volt Timer Relay
I have a in bed fuel tank with a pump to move the fuel to the main tank. I like to run the pump at 10 minute intervals to keep the main tank full. However due to advanced age I tend to forget to turn ...
Forum Discussion
96Bounder30E wrote:
How about using a 15 minute spring wound timer?......cheap and plentiful........and it doesn't care what voltage you are running through it.....(12V DC or 120V AC)
I know that timer well, having been the Chief Test Equipment Engineer at Intermatic.
It will work rather well but when using it on a DC circuit you'll need a "snubber" across the leads.
----^v^v^v^v^v^v^v----|(----
The resistor is 47 Ohms 1 Watt and the capacitor is 1 µF @ 100 Volts.
The snubber is to kill the arc when the contacts open.
