This simple neon alternating flashing circuit was found in an old American publication. The current is very low, but the supply must be made with at least 100 V.
This circuit includes a battery charging system and an inverter for operating a fluorescent lamp....
This is one of the many versions of cricket that the reader can find on this site. This circuit is...
This circuit emits a sound when a magnetic field, of a magnet, for example, approaches the sensor....