Switch Lamp Driver (CB6455E)

This circuit was found in an old Hewlett Packard publication. Its purpose is to activate neon indicator lamps with signals from a switching circuit.

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Spy Transmitter (CB19424E)
This small crystal microphone transmitter was indicated in an 80s spy book. The range depends on...
15 V Symmetrical Power Supply from 5 V with the 555 I (CB1480E )
This circuit, found in a 1978 publication, converts 5 V into a symmetrical 15 V output under low...
VHF and UHF Oscillator (CB13089E)
The configuration shown in the figure is one of the most traditional when it is desired to produce...