Micro amplifier (CB23672E)

This three-transistor circuit was found in Radio Electronics magazine from May 1969. The circuit is for hearing aids and has earphone listening.

| Clique na imagem para ampliar |

Amplifier for light beam (CB26241E)
This circuit for link or alarm was found in the Encyclopedia of Electronic Circuits Volume 5 of...
Siren for motorcycle (CB6491E)
This circuit is from a Popular Electronics of the 90's. Any power MOSFET can be used. The circuit...
Circuit for milliammeter (CB22310E)
This circuit extends the scale of a milliammeter. We found it in a documentation from the 60's. The...