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.

High speed alarm (CB20663E)
Found in documentation from the 1970s, this circuit uses an oscillator and a display to warn of...
Proximity Voltage Indicator (CB4645E)
This circuit indicates whether a cable or wire is energized by simply approaching its antenna. The...
Up to 10 hours timer (CB20360E)
Using bipolar, FETs and unijunction this long-lasting timer can reach 10 hours with good quality...