Found in an American documentation from the 90's, this circuit aims to light a neon lamp with voltages from 5 to 15 V. It is a small inverter that operates close to 15 kHz.
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...