Detector and counter (CB21510E)

This circuit was taken from old American documentation. The circuit provides pulses obtained from a magnetic sensor for application in meters.

| Clique na imagem para ampliar |

20 to 20 kHz 741 Oscillator (CB13844E)
We found this circuit in an American technical documentation from 1974. The circuit can generate...
Nixie tube circuit (CB23938E)
This experimental circuit with Nixie tube was found in the Radio Electronics magazine of March...
Amplified Microphone (CB16483E)
This circuit consists of an electret microphone amplifier powered by a 12 V voltage. A regulator is...