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.
The resistors R determine the frequencies of the oscillator together with C. The circuit is from a...
This circuit can be used as shield or to drive powerful loads from low current switches such as...
Two of the four gates of a 4011 is used in this biestable touch circuit. Do not use a power source...