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Topic: Battery powered arduino - problems with AnalogIn (Read 505 times) previous topic - next topic

ritzdank

hi,

my arduino is running with 9volt battery block and lm7805. i´m reading sensor data from a gyro sensor which is powered with 3,3volt (LD33). data is being read by max/msp and simple message system. as i recognized that during the time the values of AnalogRead changes with battery load. that seems pretty strange because 7805 should make sure that voltage (and of course reference voltage) is on constant level.

thanks

brainfart

You don't need that voltage regulator. There already is one on the Arduino board.

ritzdank

i build up arduino on a breadboard, so i need it.

Daniel

Do you have some 220uF or similar capacitors on either side of the regulator? Makes for a nice happy power supply, with better transient response.

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