Shock Generator (CB26139E)

This electronic defense was found in the 1990 special issue of Radio Electronics Experimenter magazine. A few hundred volts is generated.

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Pierce Harmonic Oscillator (CB5116E)
This circuit can generate 10 MHz signals depending on the crystal and has excellent stability....
Digital Frequency Detector (CB13288E)
This TTL digital circuit from Texas Instruments documentation from the 1970s used the company's SN types...
Simple Transistor Tester I (CB18917E)
We found this simple transistor tester in a French publication in 1981. It uses a common analog...