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Old May 27, 2011, 11:11 AM
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One have a logic level converter on it to translate the voltage levels between the 5V arduino world and the 3.3V sensor world.
To make it clear if you plan to use a WMP and a BMA020 or nunchuck you dont need a LLC, it safe to use with enabled pullups in the mutiwii software.
If you plan to use a FFIMU you dont need it, if you always know what you do in the multiwii soft (disable pullups).
This is always the case, if you know what you do and are sure you have the software settings, you dont need it in anyway.
The LLC is a safety instance and simply a good thing for your sensor health.
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