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Originally Posted by Al Skierkiewicz
There should be no reason this doesn't work as long as the negative from both power supplies and the basic stamp ground are tied together. (Including the common lead of the 7805, and the common leads of the servoes.) However, as much power as a 9 volt battery has, it is limited. You might want to get a battery holder from Radio Shack that allows you to use either AA or C cells in a 9 volt configuration.
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well I dont need 9 volts, I need 5 volts(hence the 7805) so i just need like C or D cell holders that hold 4, so i can have a long run time. i have a holder for AA's but I dont know the rating on them, if anyone one might know they are Rayovac Alkalines(I got the cheapsest ones when they were on sale)