This normally open, two-terminal, high-sensitivity circuit was found in General Electric's technical documentation from the 1980s. The circuit is half-wave.
This circuit uses unijunction transistors and drives a small speaker through an output...
This circuit, found in a publication from the 1980s, can have its output voltage determined by the...
The operational amplifier for this circuit, found in a 1979 publication, may be the 741....