This simple wireless microphone circuit for the MW band was found in an old American documentation. The coil is the oscillator of an old MW radio.
This two-phase regulator circuit was found in an Electronic Design from the 90's. The components used...
The frequency of the produced sound depends on the capacitor. With capacitors of known values, you can...
We found this circuit in an old documentation. The indicated solenoid is of low current type,...