This touch switch uses components that have easy-to-obtain current equivalents. The power supply must be isolated and the cable to the sensor must be short.
This simple telephone amplifier can be used as an auxiliary amplifier for additional listening, without...
This circuit can be used in fiber optic links or even direct links to microcontrollers and other...
This article was obtained in a French magazine Nouvelle Electronique from 1994. It can be easily...