This circuit simulates the signal produced by a muscle, serving to adjust medical equipment. The circuit is from the 1968 Mullard. Transistors support modern equivalents.
This simple receiver for listening on a crystal phone tunes the range of medium waves. The circuit...
This simple general-purpose circuit was found in a 1987 publication. It is a simple preamplifier powered...
The circuit shown is from a Texas Instruments opto-electronics manual. RE depends on the peak...