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.
Found in a 90s Popular Electronics, it serves both TTL and CMOS logic. The injector can provide 10...
We found this circuit in a technical documentation for the National Semiconductor LM3909. The...
The purpose of this circuit is to compare transistor gains in order to obtain matched pairs that...