Found in a 1967 EEE, this circuit uses the signal from the alternating current power grid to produce pulses from a Unijunction. The circuit is directly excited by the mains voltage.
We found this circuit in a 1967 General Electric SCR manual. The time is set to R1 and depends on C1...
This circuit uses an ignition coil to generate the high voltage that electrifies a fence. However, in...
Found in an older Radio Electronics, this circuit generates signals that can be used with regular...