http://www.dallas.net/~jvpoll/Battery/aaDesulfatorSurvey.htmlAnd what the heck is that (battery desulphator circuit)?
There's a message board here:
http://leadacidbatterydesulfation.yuku.com/directory
Lots of reading.
Anyway, 18 turns on one of those toroidal cores would work fine for a 1mH (1000uH) inductor. You'd be better off using an air core inductor for the 220uH, or an iron powder core rather than ferrite. Higher frequency range is the reason.
For the air core inductor, using a 1" diameter spool with end flanges spaced 0.42" apart, winding on 68 turns of AWG 16 magnet wire should work quite well.
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