What batteries to power my Arduino robot.
July 31, 2011
I would like to know what type of battery setup I should use for my robot. I have 6 AA batteries powering my motors so it's just everything else... which currently consists of...
SN7...etc. H bridge motor driver chip
Sharp IR sensor
It was working fine when connected via USB to my laptop but then I tried powering those things from the Arduino using a 9V battery and it didn't work properly. The RX or TX light was flashing and the servo was moving very slowly, one step at a time. I think the battery was pretty new but it's just a standard cheap shop bought battery, not a rechargable NiMH or something.. so maybe it's just the battery.
Although the robot is quite simple at the moment, I do want to make it a little more complex by adding a shift register to control LED's and maybe a buzzer and possibly a second servo... maybe another sensor... etc.
So I am wondering what kind of battery setup I need to supply enough current(?) to run all these things at the same time? Should a single 9V battery be able to power all those components (future additions included) or do I need a 9V battery for the Arduino on it's own and a seperate supply for all my chips, servo's, LED's and sensors? If so how would I create that seperate supply and what batteries would I use?