JFET Astable (CB22020E)

This circuit generates signals whose frequency depends on C1 and C2. JFETs are common types like BF245 or MPF102.

Electric Tool Torque Control (CB20794E)
Found in American documentation from the 1970s, this circuit can be designed based on a modern SCR,...
Codecs and Audio Circuits
June 2017 - A wide variety of Rohm Semiconductor audio and codecs for audio is available from...
7 to 15 V protected regulator (CB8679E)
Found in a 1964 Electronic Design, this circuit must use transistors according to the supplied...