This simple 555 component tester was found in the November 1992 issue of Radio Electronics magazine. The circuit is powered by 6 to 12 V batteries.
We found this circuit in the July 1988 Radio Electronics magazine. The frequencies are given by...
This oscillator for various frequencies was obtained from a 1980s telecom documentation. The...
You can adjust the frequency produced by a ring oscillator with three inverters inserting a...