Bargraph tachometer (CB7378E)

This analog tachometer was found in Radio Electronics from the 90s. The components used can still be found with some ease.

| Clique na imagem para ampliar |

Electronic Shower (CB4655E)
This circuit, found in a 1994 documentation, uses 20 A 2N5448 triacs or equivalent and should be...
Sweep Generator (CB3880E)
This sweep oscillator was found in 1980s American documentation and can be assembled with current...
One Transistor MW Receiver (CB943E)
This circuit uses one of the first commercial transistors, availble in 1958, year of the...