This circuit was found in Radio Electronics from the 90s. It converts capacitance into frequency in order to obtain a proportional voltage that can be measured in a common multimeter.
This circuit is used in the analog part of the telephone lines. The same circuit can directly...
In this project, from a Japanese magazine of 1973, only one channel of a stereo amplifier of 20 W...
Molex Sealed Industrial USB Solutions achieve superior signal integrity in harsh factory and...