3 A switched regulator (CB8859E)

Found in a 90s Popular Electronics, this circuit provides a current of 3 to 5 A depending on the transistor.

Diode Bridge Power Supply (CB4244E)
This is the traditional configuration of an unregulated bridge rectified power source. The circuit...
Metronome 1 - 4093 (CB6889E)
In the figure we have a circuit that produces interval pulses, reproduced in the piezoelectric...
1 kHz high pass active filter (CB7576E)
Found in American documentation from the 90s, this circuit passes frequencies above 1 kHz. The...