Cable Locator (CB21303E)

This audio detector circuit can be used for cable identification. We found it in a Popular Electronics from the 90s.

Q Variator (CB7369E)
With this circuit found in an American documentation from 1969 it is possible to vary the...
Digital Voltage Reference (CB24682E)
The reference voltage for this circuit can be selected digitally. The circuit is from Radio...
860 W Precision Dimmer (CB20712E)
This circuit was found in an old factory documentation. The circuit uses single-junction...