This circuit generates sinusoidal signals between 300 and 3000 Hz. We find a 303 Circuits from the 90's. The operational ones are types with FET. The power supply must be symmetrical.
With the components indicated, the circuit oscillates at 20 MHz. The coils and capacitors can be...
The trigger shown in the figure, built around a 4093 can generate pulses that reach 1 hour with a...
This circuit was obtained in an old American documentation, remembering that the 566 is the double...