Using a 4046 PLL, which is not very common nowadays, this circuit was found in the October 1994 issue of Electronics Now magazine. The power is provided by the transistor and is small in this case.
The R-S flip-flop shown here uses two NOR gates and is set and reset by positive pulses applied to...
This circuit is nothing more than a voltage quadruplicator that can generate close to 1 000 V from the...
Of course, the range of this transmitter found in a 1992 documentation is not exactly 4 km, as it...