Arduino external power source voltage

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pyta101
 
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Arduino external power source voltage

Post by pyta101 »

Hi,
I have just got myself an arduino budget pack and hence didn't get a power adapter (conscious decision as I am in Australia and wanted to get a local one.) I was wondering what the accepted voltages for the board through the DC pin are. Is it a range like 5v - 9v or is it a set 9v?

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tronixstuff
 
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Re: Arduino external power source voltage

Post by tronixstuff »

Hello from Brisbane
7~12 volts DC is fine, 2.1mm positive tip.
Have fun with Arduino!

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pyta101
 
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Re: Arduino external power source voltage

Post by pyta101 »

Thanks for the help!
A trip to jaycar is in order.

And hello from Tas :)

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pyta101
 
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Re: Arduino external power source voltage

Post by pyta101 »

Just a quick question is someone can answer me.
I bought a 9v 800mA max regulated power adaptor but whenever I hook it up the arduino gets power but what I assume is the power regulator gets burning hot within seconds and I am not too keen to leave it running like that. Am I doing something wrong or is there an issue with the adaptor or arduino board?

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adafruit_support_bill
 
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Re: Arduino external power source voltage

Post by adafruit_support_bill »

Could be a short somewhere. What else is connected to your Arduino?

tronixstuff
 
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Re: Arduino external power source voltage

Post by tronixstuff »

pyta101 wrote:Just a quick question is someone can answer me.
I bought a 9v 800mA max regulated power adaptor but whenever I hook it up the arduino gets power but what I assume is the power regulator gets burning hot within seconds and I am not too keen to leave it running like that. Am I doing something wrong or is there an issue with the adaptor or arduino board?
Cheers
Do you have a multimeter? If so, check the polarity and voltage at the end of the DC plug. You want centre-positive.
Is it from Jaycar? What's the catalogue number?

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pyta101
 
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Re: Arduino external power source voltage

Post by pyta101 »

It had an breadboarded LCD attatched to it, so it could have been a short. Could it have been the led backlight drawing too much current? I dont have a datasheet for the lcd. How much current can the 5v line of the arduino put out?

I have had the arduino plugged into the adaptor for about 10 mins now and it hasnt got hot so at least its nothing wrong with the board?

Cheers

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pyta101
 
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Re: Arduino external power source voltage

Post by pyta101 »

tronixstuff wrote:Do you have a multimeter? If so, check the polarity and voltage at the end of the DC plug. You want centre-positive.
Is it from Jaycar? What's the catalogue number?
I went with one from DSE, just cause it was a nice and compact plugpack. It has interchangable tips and it is set to the centre positive orientation.
http://www.dse.com.au/cgi-bin/dse.store ... View/M9933

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tronixstuff
 
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Re: Arduino external power source voltage

Post by tronixstuff »

pyta101 wrote:
tronixstuff wrote:Do you have a multimeter? If so, check the polarity and voltage at the end of the DC plug. You want centre-positive.
Is it from Jaycar? What's the catalogue number?
I went with one from DSE, just cause it was a nice and compact plugpack. It has interchangable tips and it is set to the centre positive orientation.
http://www.dse.com.au/cgi-bin/dse.store ... View/M9933
Cheers
Crud. Most likely a dud plugpack. Take the arduino in with you when you change it over and try it before you leave.
j

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adafruit_support_bill
 
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Re: Arduino external power source voltage

Post by adafruit_support_bill »

The 5v line should be able to supply more than enough to backlight an LCD. It depends somewhat on the source voltage, but with a 9v source I think it will supply 500 mA or so.

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