This circuit incorporates the passive control of the previous circuit and was also found in the March 1995 Electronics Now magazine. The power supply must be symmetrical.
It can be obtained from Mouser Electronics the new MAX14871 Maxim consisting of a full-wave...
This circuit provides 2.5 W of power with 6 V supply and 4-ohm speaker. We found it in the Radio...
The integrated circuit used in this detector is uncommon today. We found it in a documentation from the...