This circuit was found in a documentation for radio amateurs from the year 70. Its purpose is to produce a tone on a transducer when transmitting messages in SSB telegraphy.
In this circuit of 1987 the player has to briefly press one of the keys trying to hit which LED...
This circuit causes one LED to light up if the voltage falls below the value set in R3 and the...
This game was found in Radio Electronics from the 90s. The components used are common except some...