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 1983 Radio Electronics Special projects magazine. The components are...
With the presented circuit it is possible to detect signals from transmitters in a frequency range...
This circuit was found in a British documentation from 1969. It can be implemented with modern...