This is the circuit of a MW commercial radio obtained in a 1967 publication. The transistors are made of germanium and are powered by 4 common batteries.
This circuit was found in a 1980s document. The integrated circuit is from the time and the power...
This simple binary counter triggers two LEDs according to the number of pulses applied to the...
We found this circuit in a documentation from the 70s. The circuit uses amplifiers from the time,...