usb battery, can i power my Arduino with it?

Forum 2005-2010 (read only) Hardware Interfacing
1

I made 2 of these:

for my ipod and my phone, but i no longer need it for my phone.

i was wondering can i just plug it in to my Arduino USB Port?
or should i re-wire it to the dc jack?
Thanks

!FIRST POST!

A-TEN

2

that would work, but i have found that it is much easier and cheaper to solder a 9V battery connector to a header and plug it directly in to the 9V and Gnd headers on the arduino.

3

hi

there are tutorials for connecting external batteries to Arduino in the 'playground'...

9V adapter: Arduino Playground - 9VBatteryAdapter

Bigger batteries: Arduino Playground - LeadAcidBatteryAdapter

D

4

hi

there are tutorials for connecting external batteries to Arduino in the 'playground'...

9V adapter: http://www.arduino.cc/playground/Learning/9VBatteryAdapter

Bigger batteries: http://www.arduino.cc/playground/Learning/LeadAcidBatteryAdapter

D

I had no idea that there was a playground, thanks a-lot!

5

that would work, but i have found that it is much easier and cheaper to solder a 9V battery connector to a header and plug it directly in to the 9V and Gnd headers on the arduino.

Doesn't the 9V battery give out too much power? Doesn't the Arduino require 5V+ ?

6

The Arduino NG has an on-board voltage regulator for use with the coax power jack or the "9V" power pin. Mine has a 78M05, which tells me that (accounting for the protection diode) I can apply anywhere from around 7.5V up to as high as 36V (depends on the regulator, be careful over 20V!) to that coax power jack and the Arduino will be just fine.

If this guy has a switching supply in that box it may be a little more efficient than the linear regulator that the Arduino NG, but you'll also be powering the FTDI chip if you use the USB cable for power so the FTDI consumption may offset any savings.

-j

7

The Arduino NG has an on-board voltage regulator for use with the coax power jack or the "9V" power pin. Mine has a 78M05, which tells me that (accounting for the protection diode) I can apply anywhere from around 7.5V up to as high as 36V (depends on the regulator, be careful over 20V!) to that coax power jack and the Arduino will be just fine.

If this guy has a switching supply in that box it may be a little more efficient than the linear regulator that the Arduino NG, but you'll also be powering the FTDI chip if you use the USB cable for power so the FTDI consumption may offset any savings.

-j

I'm sorry but im a n00b :wink:
so are implying that using the usb to power it, it might not work correctly ?

8

so are implying that using the usb to power it, it might not work correctly ?

It should work just fine; this just might not be the most power efficient solution. If you've got the thing lying around anyway, try it and see.

-j