We found this circuit in American documentation from the 1980s. Transistors can be of general use. The frequency range of the generated signals ranges from 500 kHz to 10 MHz.
With a touch of S1 this circuit keeps a small strand of nichrome warm enough to light a cigarette....
This Hartley telegraphy oscillator operates with the transmitter signal generating a tone in a...
This circuit turns on a lamp in the dusk and turn off in the down. Only incandescent lamps can be...