We found this circuit in an old oscilloscope publication. With it, it is possible to observe the B / H curve (hysteresis) of an inductor in a common oscilloscope.
With this circuit, a relay can be activated from an alternating signal with frequency up to a few...
With this circuit the visually impaired can easily locate important places inside the house, such...
In the figure we have the way to use the transistors of an old-paired pair as a trigger circuit. The...