Gain 10 Voltage Amplifier (T456E)

This 4-stage circuit has a voltage gain of 10 and negative feedback. The circuit was found in an old MIT publication.

500 to 5000 Hz Astable 4001 (CB16313E)
To obtain variable frequency signals, the circuit in the figure is recommended. In this circuit, the...
Cells and Batteries Test (CB22141E)
This circuit was found in old English documentation. It can be improved by using resistors of...
Touch Volume Control (CB10566E)
This circuit was published in a 1979 magazine, but it can still be easily assembled as the...