Audio Preamplifier (CB18331E)

This small audio amplifier uses germanium transistors and a 12 V supply. The circuit is from a Japanese technical documentation from the 1960s.

| Clique na imagem para ampliar |

High Power Flasher (CB21344E)
We found this circuit in an American documentation. The power of the load, in this case,...
Proximity Sensor (CB4899E)
This circuit was found in a 1980s English publication, but can still be easily assembled by the...
Operational Voltmeter (CB14855E)
Using an operational amplifier with FET, this voltmeter has a high input resistance. The circuit has...