Found in an Electronics World of 1968, this circuit is indicated for applications in photography making the control of a camera aperture. The components are from the time.
This circuit mimics the sound of a siren when we turn the axis of the small DC motor. The...
This filter is inserted between the interfering device and the interfering device. The coils are...
We found this circuit in a Radio & Electronics Constructor of November 1975. The magazine no...