This circuit was found in a 1967 General Electric manual. It is intended for the control of high voltage Nixie pipes used at the time. SCRs may be equivalent.
This circuit can be used as a shield for microcontrollers such as the Arduino. Frequency is given...
This PWM circuit was found in an American publication in 1978. It consists of a simple control that...
This circuit was found in 1968 General Electric documentation. The circuit uses components from the era...