How do I start my Arduino going?

Hey guys I just got my Arduino Uno and I'm not exactly sure how to power it up using the jack. I now know that I can run it off of the USB cable but how do I hook a battery to it? I've heard that your supposed to use 5 volts, but I don't see how I can get 5 volts. I only use AA and 3v and 9v batteries. So, also, since it can run off a USB port, I'm assuming I can use my phone charger to hook up the USB to it? Isn't it all 5.1 v? Well, please help me out and tell me if how many volts mA the board needs, which is too much and which is to low. 

Thanks guys!!!


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caitlinsdad4 years ago
The board has some voltage regulating circuit on there so you want it max 9v. I use a 9v battery with a battery clip soldered to a barrel plug(Radio Snacks, Size M, coaxial, 5.5mm O.D. x 2.1mm I.D, positive + center/tip) or use a 4 battery holder (4x1.5v AA, AAA, etc) to get the min voltage it needs.
HavocRC (author)  caitlinsdad4 years ago
Hey thanks so much! Do you know if I could use a phone charger to hook up the USB cable to?

I've used one of my phone chargers that has a usb jack on it. I just swapped out the cable for the bigger USB connector on one end to fit the arduino.
HavocRC (author)  caitlinsdad4 years ago
Oh, well I'm talking abou the type of chargers that you hook the end of you USB cable going from your phone into it. Like and iPod charger. I have two USB chargers. Which one would work better if at all?

5v and .55 mA
5.1v and .7 mA
Try either one, there is a tolerance + and - that it smooths out.
HavocRC (author)  caitlinsdad4 years ago
So I'm not gonna fry my nice new board with either? :D
You'll never know if you don't try.
HavocRC (author)  caitlinsdad4 years ago
No no no no! I'm not gonna just try and hope it doesn't fry! I went broke buying the board! My money does let me try such experiments. I'll guess I'll have to find out some info of the board operating mA. Hey thanks about the batteries!