Found in the June 1987 issue of Radio Electronics magazine, this circuit uses well-known CMOS components. The circuit has a CMOS amplifier stage that drives a small speaker.
This circuit is from an Argentine publication from the 1970s but can still be assembled with...
This circuit has already appeared on this site and in our articles. This version is from 1999. The...
The fraction of watt amplifier shown can be powered by voltages from 6 to 9 V. It is not...