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Author Topic: problem powering arduino RBBB from batteries  (Read 472 times)
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Hi, i am trying to power my RBBB (atmega 328 pu, duemilanove, 5V) with 4 AAA batteries (4,8V 4000mAH). but when i connect the cables from my battery pack to any of the 5V pins and ground my board does not seem to work. If i power it through the FTDI cable everything works fine..

Is there a chance the 4,8 V are not enough and the board only works from 5V and above? i thought that these boards work even with 2,2 voltage supply.

Thank you for any suggestions..
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I should be working without problem.

Do you have a multimeter to test the battery pack ?
Could you check the wiring (once more) ?
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i don't have a multimeter but from the same battery pack i can successfully power two 6V motors.. i have checked the wiring several times and i know that the 5V pins are working fine because i can power my RBBB from the 5V output of my UNO board.. I was thinking maybe i should snip off the voltage regulator..
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Hi, i am trying to power my RBBB (atmega 328 pu, duemilanove, 5V) with 4 AAA batteries (4,8V 4000mAH). but when i connect the cables from my battery pack to any of the 5V pins and ground my board does not seem to work. If i power it through the FTDI cable everything works fine..

Connect it to the FTDI pins.

If it doesn't work, the problem is the batteries.

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Scrub that,just realised I was looking at the wrong diagram.
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my mistake! my batteries drained out during the night i suppose because i had them connected to the motors and without the motors running or something like that i think that they were drawing current. So i thought that my batteries were fully charged since i hadn't used them and apparently when the motors were moving it was from the ftdi cable and not the batteries.. i thought that the cable was powering only the arduino and not the motors.. but obviously that was not the case.. :p
thanx anyway!!
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