This constant current source for high voltage loads was obtained from a 1967 General Electric documentation. The components are of the time, but allow equivalents.
This circuit was found in a Delco 1965 publication. Transistors may be current equivalents according...
This circuit makes an incandescent lamp blink in order to vary its brightness with a candle...
This configuration was found in a 1970s American magazine. The circuit uses both CMOS logic and...