This interesting circuit of the 50s uses a fluorescent lamp to obtain a stroboscope useful for the rotation of motors. The circuit uses a power valve to control the 10W fluorescent lamp.
This traditional clock circuit with common CMOS components with discrete logic functions was found...
Although ECL logic is rare (no longer used), this circuit from a 1992 documentation shows how to...
Found in 1965s General Electric documentation, this circuit is intended for the control of servos...