The integrated circuit used in this circuit is from the time of publication. The circuit is from a Radio Electronics from October 1987. The triac must be equipped with a heat sink.
This circuit with JFET and Unijunction was found in an ancient American documentation. The...
This metering bridge circuit uses one power supply only. The operational ones depend on the...
We found this configuration in the 1964 RCA transistors manual. As indicator loads in each stage,...