AC Delay (CB21433E)

This trigger-delay circuit was found in a 1960s General Electric unijunction transistor manual. The circuit applies to the 2N2646.

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Electronic doorbell (CB25029E)
This circuit was found in the April 1984 issue of Radio Electronics magazine. The integrated...
AC to DC converter (CB14124E)
The presented circuit was found in the National Semiconductor's Linear Applications Handbook from...
Power Oscillator 741 (CB15616E)
This circuit is basically the same as the previous configuration (CB15616E) with a power stage with...