Beacon with PUTs (CB9788E)

This circuit was found in old documentation, appearing in several ways in this section. PUTs are not currently common components.

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Centigrade Thermometer ICL7117 (CB15360E)
The sensor for this Intersil circuit (1983 databook) is a common silicon transistor. The trimpot...
Constant Volume Amplifier (CB12264E)
This circuit is from a 1980 publication. The circuit has high gain with weak signals and lower gain...
15 W Amplifier using theTDA7204 (CB3832E)
The integrated circuit used in this 1987 project is not very common these days. However, if found...