7-segment display driver (CB20551E)

We found this circuit in English documentation from 1996 for PCs. The circuit is for common cathode display.

Slow Start for Model Railroad (CB4723E)
This circuit simulates the actual departure of a train as the speed increases slowly. The power...
Bongo Drums (CB828E)
This circuit can be used to produce the sound of bongo drums. Damping is adjusted by P1. The...
Bass-Booster Preamplifier with 741 (CB926E)
This circuit in its original version was found in an 1975 English publication. It is a...