Micro metronome (CB20743E)

This simple CMOS metronome circuit can be mounted in a small box, providing both sound and light sources.

10 W amplifier TDA2870 (CB19162E)
This circuit is from the documentation of the 90s. Thus, the integrated circuit used is not common...
Biquad Filter LM148 (CB4012E)
The circuit is from the 1990 Motorola Linear Databook. The circuit can be implemented with other...
Symmetrical regulator (CB8698E)
Found in a 1968 documentation, this circuit provides symmetrical voltages determined by component...