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Author Topic: Beeping at 200m  (Read 1334 times)
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You could use a -very- small capacitor to change square wave edges to sawtooth.
Just how small though, I am not the person to say.

Cheap 200x audio amp (they have a 20x too) that uses an LM386 chip:
http://www.lctech-inc.com/Hardware/Detail.aspx?id=f298dfcb-b19f-4318-9169-51a2bba26b6c

I haven't tested one yet, just got 2 of each.

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I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.

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