This audio-driven relay was published in the July 1977 issue of Radio Electronics magazine. The circuit uses CMOS components, and the relay must be a sensitive type.
We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has...
This precision circuit can provide timings from 0.2 milliseconds to 3 minutes accurately. The...
Using the 741 this basic circuit was found in the November 1973 Radio Electronics magazine. The...