This power source was found in a Motorola manual from 1968. Transistors are from the era, and current equivalents can be used.
In the figure we show a timer, which is simpler because it uses only one of the four gates of the...
This receiver can tune in the 3 to 12 MHz band with good sensitivity and selectivity, using a good...
This circuit squares the waveform of a signal applied to its input. The circuit is from an old...