Graphic equalizer KA2223 (CB25943E)

This circuit was found in a Radio Electronics from April 1990. The circuit has 5 equalization bands given by the capacitors used.

| Clique na imagem para ampliar |

Speed Game (CB11389E)
Who is the fastest? This is the other name of this interesting circuit that makes it possible to...
Unijunction Audio Generator (CB24247E)
This simple basic circuit that appears in several places on this site from various sources is from...
Stable rectangular oscillator (CB21498E)
Found in documentation from the 1960s, this circuit uses general purpose transistors that can...