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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Accented Metronome (CB5336E)
This circuit was found in an ancient American documentation. The transformer is the type used in...
Full Wave Triac Trigger (CB13467E)
This circuit generates two pulses per cycle of alternating voltage for full wave control. The...
Current Booster (CB15505E)
To increase the control capacity of the CA3140, an amplifier circuit can be used, as shown in the...