This circuit has a sensitivity of 2uW. We found it in documentation from the 1980s. The integrated circuit is from that time. Equivalents can be tried.
Found in a Popular Electronics from the 90s, this game can be seen in other configurations on this site. The...
This single-channel remote control transmitter operating in the FM range uses common components and...
Although it is a common configuration today, this circuit was taken from an old publication. The...