I've added a simple analog output circuit to my Teknetics Patriot metal detector. It feeds a micro-ammeter
which is mounted at the Patriot's control / display head. Aside from the immediate benefit of overcoming the
Patriot's LCD display's lack of backlighting, the analog circuit has its own semi-independent discriminations,
and is useful for interfacing instruments to the Patriot other than the meter, such as recorders and analyzers.
Details are here :
http://ki3u.byethost3.com/Instruments_e ... ector.html
Berj / KI3U