Binary Counter (CB6139E)

This General Electric circuit is from the 80's. The PUTs used in this meter are not common components today.

| Clique na imagem para ampliar |

4-Tone Oscillator (CB21115E)
Using 4 operational amplifiers this circuit generates 4 different tones. The circuit is from an...
Positive or Negative Voltage Doubler (CB1229E)
In the figure we have an application of an oscillator 4013 as voltage multiplier. It consists of a...
10 to 84 MHz Colpitts oscillator (CB4052E)
This Colpitts crystal oscillator was found in an American publication for amateurs in the 1980s....