This circuit was found in the June 1982 issue of Radio Electronics magazine. It provides reference voltages for calibrating instruments such as oscilloscopes.
This circuit was obtained from an old publication from 1974 but can still be assembled with some...
This level matrix display was found in a 1994 documentation, but it can still be assembled, as the...
This circuit can be implemented with any triac of the TIC series and the lamp must be...