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.

EMP Detector (CB23889E)
Originally intended to detect EMPs produced by tests or atomic blasts, this interesting circuit...
Automatic plant sprinkler (CB20778E)
This circuit triggers a small water pump when the humidity detected by the sensor is reduced in a...
Remote power sensor amplifier (CB7444E)
This circuit was found in Maxim's documentation from the 90's. The configuration uses components...