Subwoofer Simulator (CB25130E)

This circuit consists of a bass filter that can be used as a subwoofer in a sound system. The circuit is from a Radio Electronics from May 1988.

| Clique na imagem para ampliar |

Binary and Decimal Counter (CB17422E)
This didactic circuit was found in a 2001 documentation. It presents the result of programming in binary...
Variable Frequency Oscillator (CB22465E)
This VFO circuit generates signals from 2 Hz to 50 Hz. We found it in Popular Electronics from...
3-Tone Oscillator using the741 C (CB4426E)
This circuit can be used as a buzzer from 3 different locations, allowing you to identify where it went...