FET caracteristic curve plotter (CB20730E)

Found in American documentation from the 90s, this circuit uses components that are still common today. The 15 V power supply must be symmetrical.

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Target Shooting (CB16710E)
The digital target shot shown in the figures (weapon and target) was found in a 1992 documentation but can...
Amplified Speaker (CB25159E)
This amplified speaker is from a Radio Electronics from September 1988. The power integrated...
Headphone amplifier (CB20653E)
The transistors used in this 1985 Radio Electronics circuit are for general use. The gain pot can...