8 Grove Bar Graph at same time

Hi everyone,

I am using the Grove Mega Shield : http://seeedstudio.com/wiki/index.php?t ... ega_Shield with my Arduino Mega 2560

I want to use 8 Grove LED Bar Graph at the same time... http://www.seeedstudio.com/wiki/Grove_-_LED_Bar

Of course this doesn't work because the card doesn't provide enough power. Even with an external power supply of 12V.

What should I do ? Can I change the brightness of the LEDS ? Or I should use a ULN2803 ?

Thank you

Statistics : Posted by alexis.martin.1050 • on Sun Mar 23, 2014 5:22 am • Replies 0 • Views 20

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