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The Adventures of Professor Ventura

Circuit Bench

Transistor Tester (CB21956E)
This transistor tester was found in a publication by Gernsback from 1960. The circuit can be used...
3 V power source small radios (CB8717E)
This simple power supply, which is equivalent to 2 AAA or AA batteries, was found in an Elektor...
60 V Bidirectional Motor Control (CB19568E)
We found this circuit in an American publication from the 90s. The transistors must be provided with...