We found this circuit in the December 1998 issue of Electronics Now magazine. RF transistors such as the BF494 or BF495 can be used. The circuit works at lower frequencies.
This circuit was found in a Popular Electronics from the 90s. The circuit uses general purpose...
This circuit was found in an American publication from the 1970s. The circuit uses components from...
This 4-competitor TTL speed game was obtained in a 1980s documentation, but can still be easily...