Low voltage dimmer (CB7855E)

This circuit was found in a 90s 303 Circuits. The circuit operates in a 200 Hz switching mode and the output current reaches 5 A.

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Biquad Filter LM148 (CB4012E)
The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
Operational Amplifier with FET (CB3943E)
We can obtain the characteristics of an operational amplifier with FET by adding FETs common to the...
Transistor Testing with Oscilloscope (CB24220E)
This interesting circuit for testing signal transistors with the oscilloscope was found in the...