Locked relay driver (CB21222E)

This circuit can be used as a shield for microcontrollers. The relay is power compliant, and the transistor is general purpose.

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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...