I have one of these http://www.mytoybox.com/PPIGED1084.html . And I want to add a timer circuit in place of the pushbutton so it runs around the front yard, it's 6 volts.Anybody have diagram how to make the circuit.
With 90k resistors and 1000uf capacitor, it should go about 2 minutes on, pause for about a minute, then go again. The values of the resistors and capacitor aren't very critical if you're not too set on a specific time.
The circuit should work anywhere between 5 and 12 volts with this fet. The lower limit is the voltage needed to turn the fet full on.
If you want to fiddle with turning things on and off, get to know. They're the handiest things. I have a little drawer full of 35 amp fets, but they take like 10v to turn on, so you'd need a 12v supply.