We found this circuit in a Popular Electronics from the 80s. This circuit eventually doesn't work with modern, higher speed controls. Experiments must be done.
This metal detector was found in a 2001 Poptronics, but it can still be easily assembled, as the...
This circuit for 6 lamps was found in old American documentation. The supply is of high voltage...
With this circuit it is possible to have a safe indication of the balance point for the signals of the...