This bistable circuit that drives a relay with a pushbutton was found in the March 1pp6 issue of Electronics Now magazine. A common bipolar with a 1k resistor at the base can be used in place of the FET.
This sonic switch, sound relay or simply vox uses a medium impedance speaker as a microphone. The...
This 1.2 to 32 V x 3 A regulator was found in an 80's EDN. The power components must be equipped...
In the figure we have the way to implement a sinusoidal oscillator with the 4093 IC. The component...