This sensitive motion sensor with inductive sensor was found in a 90s Elektor. The circuit uses only transistors to activate a buzzer.
This step uses germanium transistors such as the AC151, GE2, and others having been found in a...
This circuit was obtained in an Electronic Design from the 80's. It has the adjustment of the gain...
We found this high input impedance, low output impedance amplification stage in the October 1993...