This game aims to make you discover which is the combination of activated switches that make the LEDs light up. The circuit is powered by batteries or cells.
We found this circuit in a transistor manual from the 1960s. The transistor is the Germanium...
This booster for listening to signals in the range from medium waves to 30 MHz was found in a 1998...
This simple 60's receiver is powered by solar cells of the time. The transistor is made of...