This is the receiver for the earlier system published in the August 1988 Radio Electronics magazine. Optical capabilities can be used for extended range.
If you have a disused old computer, the type that still has a parallel port, you can use it in...
Using earphone for listening, this receiver has only one germanium transistor. The circuit is from...
This oscillator can generate signals up to a few megahertz depending on the crystal used. Actually...