Diode Tester (CB22137E)

This diode tester was found in an English publication from the 1980s. Transistors are general-purpose types of the time.

High Speed Instrumentation Amplifier (CB4940E)
This amplifier, found in a 1980s documentation, should be powered by a symmetrical source. Modern...
Recording and playback circuit with ISD1000A (CB7441E)
Found in an Electronics Now from the 90s, this application uses an integrated circuit from the...
Logic level indicator and Anti Debounced Switch CIR3010S (CB16256E)
The circuit in question was found in a 1982 documentation. Its operation is as follows: since the...