Hi,Ruijc
Why not run it with 4 or 5 old NiCd cells ??? if 12v batt used, only a switching regulator will do it ( LM 2575 or 2576 i.e )
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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