Found in a Hands On Electronics from the 90s, this circuit can be easily assembled today, as the FET can be equivalent and the operational is general-purpose.
This is the traditional configuration of an unregulated bridge rectified power source. The circuit...
In the figure we have a circuit that produces interval pulses, reproduced in the piezoelectric...
Found in American documentation from the 90s, this circuit passes frequencies above 1 kHz. The...