This circuit protects the speaker from dangerous direct currents that could damage it. The circuit is from an Electronics Experimenter Handbook 1993 edition.
We found this circuit in the April 1978 issue of Radio Electronics magazine. The power supply must...
The frequency and active cycle of this circuit can be adjusted in P1. The LEDs flash alternately at a...
We have already explored this configuration in several articles on this site. This was found in an...