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Author Topic: Immense heat with the new Ethernet Shield  (Read 1169 times)
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Portugal
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Hi, today I connected my brand new Ethernet Shield to my Duemilanove and, to my surprise, the shield grew very hot very fast!
The hot part is the WIZnet million-pin IC.

I grabbed my Digital Thermometer and, to my surprise, it was 49ºC (120ºF)!!!

Is it supposed to be this hot? The only thing it's connected to is the computer - through USB!!!


I'm kinda freaking out, guys, I don't wanna blow up my shield... It was NOT cheap. :/
« Last Edit: September 03, 2010, 06:53:36 am by pedrotome » Logged

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did you assembled it yourself?
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Portugal
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No, it came fully assembled. I don't even think it's sold as a kit...
Look at it: who would want to solder this themselves? link!
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I have two of the original Ethernet Shields (same Wiznet chip).  They run a "little" warm.  My uncalibrated fingertip says the surface of the IC package is probably somewhere around 40-41C.  Not hot enough to make me uncomfortable.

This is with or without connection to my Ethernet LAN.

Regards,

Dave
« Last Edit: September 04, 2010, 01:56:55 am by davekw7x » Logged

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Same here, my old ethernet style shield runs 'warm' to the touch.  The wiznet is a greedy little begger and consumes about 150 mA, at 5v thats 0.75 W, about right to mildly warm the chip. Again, my fingers are uncalibrated smiley-wink
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Fingers are quite well - with a little bit of practice you can distinguish: below 10, around 20, 30, 35, 40 , around 50 centigrades.. Also 80 degrees is simple as this is where proteins co-aggulate....
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Mine got around 50°C too. But still lives.
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Thanks guys.
I thought there was actually something really wrong... Oh well... :smiley
« Last Edit: September 04, 2010, 07:07:37 am by pedrotome » Logged

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