Let's Make Robots!

Battery choice for Arduino project

 Hello, I'm currently working on a project with the Arduino Uno R3 that includes 4 HXT 900 9g servos, LCD 16x2 screen, and a HC-SR04.

 This being my first electronic project I wanted to keep it as simple as possible. From reading the Uno manual It says the lowest  operating voltage is 6v, and the lowest recommended is 7v.

 Do you think I would run into any problems by running the entire project from 6v Nimh? I had my eye on this 6v battery pack but I think the mAh may be a bit too low. http://www.hobbyking.com/hobbyking/store/__25030__Turnigy_LSD_6_0V_2300mAh_Ni_MH_Flat_Receiver_Pack.html  I had planned to run the power to the servo's directly without regulating them to keep it simple, but then I had a look over Oddbot's regulating guide http://letsmakerobots.com/node/3880  and it seems I would still want to regulate the 6v power source.

  Or perhaps I should should just bump the battery count up to 6 AA Nimh to make it 7.2v? I would rather stick to using Nimh batteries as I said before this being my first leap into electronics I wanted to keep it simple (and safe). LiPo batteries seem a bit intimidating to me at the time being.

 Any advice Is appreciated and I apologize for my ignorance. Thanks!

 

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You know, I am not afraid of my tablesaw. That said, I have a huge amount of respect for what my tablesaw can do to me. I use proper techniques, I know what (and why) and I am doing when I am doing it.

Lipo's are probably the same. Nothing to worry about, but you have to respect their power. Just treat them nice and you will be all set. Don't use the wrong charger. Charge them outside on concrete. If they "go puffy" get rid of them. Don't short them or try to suck huge amounts of current.

Be nice and they will be nice too. The fact that you are asking this question (and concerned about this) means you will never have a problem.

Thank you for the advice, and wisdom Chris the Carpenter.

I think for the this project, however I will stick to Nimh. I will stick to the keep it simple strategy for my first tour into the world of electronics, but LiPo will definitely be an option further In .

I think after reading this I am even more intimidated of lipo, especially after reading "store in fire proof bag".