This simple three-LED sensor uses an NTC at the input. The circuit is based on an uncommon integrated component today. We found it in documentation from the 80s.
Found in an Electronics Now from the 90s, this circuit can be triggered by an external control...
We found this circuit in the September 1994 issue of Electronics Now magazine. The circuit uses...
Who is faster? or reaction game are other names for this circuit that we find in old...