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.
With this circuit general purpose diodes and rectifiers can be tested with ease R has 100 ohm for...
This circuit is from 1976 documentation, but it can be assembled with more modern transistors like...
This circuit can provide constant currents adjustable between 1 and 10 mA. The transistors can be...