Hughes suggests this circuit in a 1968 documentation. The circuit uses old transistors that can be replaced with equivalents. MOSFET is the critical component of the circuit.
This timer counts down the times until, at the end, it activates a relay. The programming time is...
This fixed source configuration with 78xx series regulators has already been explored in several...
We found this configuration in an American 80's documentation. The circuit can be implemented with an...