This dual-LED circuit indicates three signal levels. It was found in the January 1996 issue of Electronics Now magazine. The integrated circuit may be an LM339 or another comparator.
This circuit switches the brightness of the LED. We found it in an English documentation....
The circuit shown in the figure triggers a relay when S1 is pressed, but this only in the absence of...
This astable multivibrator is one of the many configurations that we have in this section and on...