This circuit uses an LED (called SSL) to regulate current in a configuration with complementary transistors. The circuit is from 1970 General Electric documentation.
This simple power supply for transistors was found in documentation from the 1940s. The...
This circuit is more sensitive than the previous one (CB4118E) for using a full wave detector. The...
The relay used in this circuit is highly sensitive and has a diode and is recommended in parallel to...