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.
Counting up to numbers lower than 10 [between two and nine] can be done by connecting the n+1...
This is the name given to this small MW transmitter that can function as a wireless microphone. The...
This circuit causes an LED to flash on a robot when someone speaks near him, showing that he is...