This circuit is from old American documentation, using a regulator integrated circuit that is uncommon today. The diodes can be 1N4002 and the transformer has a 500mA secondary.
Texas Instruments' TMS1000 integrated circuit was very successful in the 1980s, consisting of a...
Found in 1965 General Electric documentation this circuit applies to a LASCR used as an optical...
This sophisticated RPM counter circuit with discrete integrated circuits was obtained in a 1993...