Adjustable Noise Clipper (CB21106E)

The purpose of this circuit is to limit the noise of an audio signal. Diodes are made of germanium. The circuit is from an old American manual.

| Clique na imagem para ampliar |

Micro Power LED (CB15111E)
This circuit causes an LED to flash at a frequency determined by the capacitor. The circuit has an...
Analog frequency meter (CB7918E)
Found in American documentation from the 90s, this circuit can measure frequencies on a linear...
FM Optical Transmitter (CB5269E)
This frequency modulated light transmitter is from a 1990s documentation. The circuit may use...