This integrating circuit multiplies the time that can be obtained with a 555 timer. We find it in an Electronic Design from the 90s. The circuit uses components that are still common today.
This device can be used as a proximity arm, touch sensor or electronic bell. When connected to a...
This project, found in a 1981 documentation, consists of an interesting adaptation of the test...
This digital indicator circuit was found in the June 1988 issue of Radio Electronics magazine. The circuit...