Test interface (CB8222E)

Found in 90s Popular Electronics this circuit amplifies signals over a wide range of frequencies.

| Clique na imagem para ampliar |

Balanced Modulator (CB4224E)
This circuit was found in a 1980s telecommunications publication. The circuit uses a diode bridge to...
High Quality Headphone Amplifier (CB11998E)
This circuit is from an English magazine from 1980, but it can be easily assembled with more...
Two 555 Siren (CB16400E)
The indicated circuit is an intermittent one in which we use two 555 integrated ones, one as a low...