Crystal converter (CB7327E)

This circuit was found in a Popular Electronics from the 90's. The circuit can be used to convert signals to frequencies up to 25 MHz.

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Lightning Lamp (CB6884E)
This 2004 circuit is based on the ionization effect that occurs in old incandescent lamps with...
Single Output Current Sensor (CB5251E)
This bidirectional current sensing circuit was found in a 2005 Linear Technology application manual....
Mechanical Oscillator (CB20496E)
This circuit can be used in decoration or to draw attention, in a “fake” assembly for example. What he...