Adafruit Ethernet 1.2 over heating

[Itigger]

Just assembled the adafruit Ethernet pcb as described on ladyada.net. It does work and obtain an ip address, but the 3.3 volt regulator is way too hot to touch within seconds of applying power from USB or adapter. Have rechecked all solders and they appear correct. I would assume if there was a short the shield would not work, but the test arduino dhcp sketch runs fine. Any ideas? All components are as described on ladyada.net.

[adafruit]

hi there, we don't support the XPort ethernet shield anymore - and we havent sold it in years. Sorry we can't help anymore - all documention we have are on the site.

[Itigger]

That's not really very helpful is it. Not having sold it in years is poor trouble shooting. Unless of course that's why you stopped selling it.

[adafruit_support_bill]

The XPort modules that the shield was designed for were discontinued by Lantronix several years ago. The Arduino Ethernet Shield is a well supported replacement so we decided to sell those instead.

As for troubleshooting, the shield itself is not very complex. 99% of the functionality is in the module. We can take a look at your soldering if you like, but we don't have any way to troubleshoot the module.

[SolarboticsR&D]

Unfortunately the parts list wasn't exactly as described on the ladyada.net as I recommended the wrong 3.3V regular without realizing it. The 3.3V TO-92 regulator carried by Solarbotics (L4931-33) has a different pinout than the MCP1700-3302E, hence the overheating.

I apologize to both parties for any inconvenience this may have caused. I have since replaced the regulator with a MCP1700-3302E the board and the regulator is running fairly cool. The rest of the Adafruit ethernet shield PCBs that Solarbotics has in stock (3) now will come with a free MCP-17003302E regulator.