Found in American documentation from the 1980s, this circuit makes use of components of the time, which are uncommon today. The circuit detects the approach using a sensor formed by metal plates.
This circuit makes it possible to recover programs recorded on cassette tape as was common in MSX...
This ultra-simple adjustable power source is of great use on the bench of any electronics...
Found in a 1990s American technical brochure, this circuit is intended for alarms that use as...