This circuit converts infrared pulses into audio and can be used in an experimental telegraphic link. The circuit is from a Popular Electronics from the 90s.
This circuit with two operating modes was found in the September 1989 issue of Radio Electronics...
This circuit was suggested by old French documentation, but it can be used as a shield, in which...
This well-crafted speed game setup for two competitors was found in a 1998 Poptronics. The circuit...