Found in a 1964 Electronic Design, this circuit generates pulses based on an avalanche diode of the time. The circuit can be tested with modern equivalent components.
Found in old documentation, this circuit uses special discharge lamps (neon) of the time. The...
This 1968 Texas Instruments circuit uses diacs of the era. SCRs can be modern equivalents according...
This circuit is designed to measure very weak currents, in the order of picoamperes. We found it...