Wire Finder (CB21301E)

Found in an Electronic Hobbyist Handbook from the 1990s, this circuit is intended to apply a signal to a cable to enable its location.

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Thyristor Tester (CB18222E)
The purpose of this 1985 circuit is to make the sound test of type 106 SCRs (MCR106, TIC106,...
TTL Optical Sensor (CB16930E)
This circuit can be used as an optical switch or photosensor to excite TTL logic. The transistor can be...
Operational Half Wave Rectifier C (CB14123E)
The presented circuit was suggested by the 1994 Linear Applications Handbook from National...