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.
Three of the four gates found in a 4001 can be used to perform as an AND gate. This improvisation...
This circuit generates a train of pulses that depends on the time that is pressed PB and the value of...
This circuit for the 85 to 95 MHz band has a gain of 15 dB. We find it in a 1980s documentation. The...