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Old Dec 10, 2009, 01:42 AM
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Magicsmoke maker
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Australia, QLD, Charters Towers
Joined Dec 2003
17,427 Posts
Well, if we use a switched capacitor booster arrangement it's not too complex (no inductors or diodes etc) but then you have to use a piezo because otherwise a normal magnetic buzzer will draw too much power (10mA vs 100mA).
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