Pages: [1]   Go Down
Author Topic: Getting HOT, HOT, HOT...  (Read 1481 times)
0 Members and 1 Guest are viewing this topic.
The people's republic of Massachusetts
Offline Offline
Full Member
***
Karma: 0
Posts: 135
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I just got my first Arduino and am in love  smiley-mr-green

But, after having it on most of the day sitting on my desk the board by the power connector was so hot I could not keep my finger on it. 

I had an Ethernet shield, and 16x2 LCD display connected.  The LCD display had 3.3k resistor inline with e back light.  Power supply is 10v DC

Is this normal ?????????????????
Logged

The people's republic of Massachusetts
Offline Offline
Full Member
***
Karma: 0
Posts: 135
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

kinda what I was thinking, but how else do I power the Ethernet shield? It appears to be a power hog.

I don't know the draw on the LCD but I assumed it was not much.  I will put a meter on it today and see.
Logged

Global Moderator
Boston area, metrowest
Offline Offline
Brattain Member
*****
Karma: 548
Posts: 27387
Author of "Arduino for Teens". Available for Design & Build services. Now with Unlimited Eagle board sizes!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Tight squeeze to try and get a heat sink in there.

Order yourself a lower voltage supply, like 5V and connect to the header pins, or 7.5V to go thru the barrel jack.

http://www.dipmicro.com/store/DCA-0510
http://www.dipmicro.com/store/DCA-0520
http://www.dipmicro.com/store/KLDX-0202-A  ,Add a couple of wires to connect to +5 & Gnd

http://www.dipmicro.com/store/DCA-07510
Logged

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

The people's republic of Massachusetts
Offline Offline
Full Member
***
Karma: 0
Posts: 135
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

What can the on board regulator provide for total "accessory" current?

My Ethernet shield is drawing 0.17 A and will start to cook the regulator in about one min.


CrossRoads, that was my thoughts, I will go digging in the box-o-wall warts.
Logged

Global Moderator
Boston area, metrowest
Offline Offline
Brattain Member
*****
Karma: 548
Posts: 27387
Author of "Arduino for Teens". Available for Design & Build services. Now with Unlimited Eagle board sizes!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Onboard regulator is rated at 800mA with proper heatsink.
Will cut off sooner if gets too hot.
If you'd ordered from dipmicro on the 6th you'd have had it already ...

Any chance you run to YouDoIt Electronics in Needham & grab one?
Or maybe poke around Ocean State Job Lot?
Logged

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

The people's republic of Massachusetts
Offline Offline
Full Member
***
Karma: 0
Posts: 135
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Onboard regulator is rated at 800mA with proper heatsink.
Will cut off sooner if gets too hot.
Wow...

If you'd ordered from dipmicro on the 6th you'd have had it already ...
I am sure I have one in the box down stairs, just need to go look  smiley-lol

Any chance you run to YouDoIt Electronics in Needham & grab one?
Or maybe poke around Ocean State Job Lot?
I have yet to go to You-Do-It, but I have it on my list next time I have free time and am in Needham  smiley-cool
As for Ocean State, I got that covered... The wife works for them.
Logged

Rio de Janeiro
Offline Offline
Newbie
*
Karma: 0
Posts: 34
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

02660,

What surface you let your Arduino above and which material is it made of?
Logged

Grand Blanc, MI, USA
Offline Offline
Faraday Member
**
Karma: 95
Posts: 4093
CODE is a mass noun and should not be used in the plural or with an indefinite article.
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset


What's up with the sizes on these power connectors?  I've seen 2.1mm and 2.0mm.  Are they compatible?  The Kycon KLDX-0202-A is 2.0mm according to the datasheet.  I bought some similar jacks elsewhere that were called 2.1mm but now that I look at the datasheet, I think they're really 2.0mm.  Can't get the calipers in to get a good measurement.  I've bought wall warts from Sparkfun and Adafruit and they're called 2.1mm on their websites.  DIP Micro calls all theirs 2.0mm.  I haven't had any compatibility problems but I'm wondering.  Seems silly why a 2.1mm part would be needed if the 2.0mm version already existed, or vice versa.
Logged

MCP79411/12 RTC ... "One Million Ohms" ATtiny kit ... available at http://www.tindie.com/stores/JChristensen/

Global Moderator
Boston area, metrowest
Offline Offline
Brattain Member
*****
Karma: 548
Posts: 27387
Author of "Arduino for Teens". Available for Design & Build services. Now with Unlimited Eagle board sizes!
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Jack,
They say 2mm but they take the 5.5/2.1 power cords quite snugly.
« Last Edit: August 11, 2011, 09:02:26 pm by CrossRoads » Logged

Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

Pages: [1]   Go Up
Jump to: