X-post from [my comment on the hookup guide tutorial and [my x-post on the product page; I was asked to post here instead:
To power my Photon Weather Shield, I purchased a 9V AC adapter wall wart ([TOL-15314). By all accounts, this [should be acceptable for the rated voltage of the 3.3V regulator on the shield (no modifications were made to the shield itself; no traces cut nor solder jumpers jumped. I understood the shield to come configured to accept ~2.5-11.5V in its default configuration).
Whenever I plug the board in, the regulator goes into thermal shutdown. It usually takes several minutes, but eventually it just locks everything up. I’ve been considering buying either a [5V wall wart, tacking on a [heat sink, or swapping the MIC5205 3.3V regulator for a different regulator, but I figured I’d ask…am I crazy? I have my setup enclosed in a Big Red Box ([PRT-11366) and the reg gets so hot that it actually effects the readings of the shield’s onboard temp sensor…not to mention the thermal shutdown
To clear up [questions that I’ve been asked from my previous posts, I am ONLY powering my setup using a 9V AC wall wart adapter through the shield’s barrel jack.](https://www.sparkfun.com/products/13674#comment-5eaa0a8b004d8849111d4bd3)](https://www.sparkfun.com/products/11366)](https://www.sparkfun.com/products/11510)](Wall Adapter Power Supply - 5VDC, 2A (Barrel Jack) - TOL-15312 - SparkFun Electronics)](https://learn.sparkfun.com/tutorials/photon-weather-shield-hookup-guide-v11#hardware-overview)](Wall Adapter Power Supply - 9VDC, 650mA (Barrel Jack) - TOL-15314 - SparkFun Electronics)](https://www.sparkfun.com/products/13674#comment-5ea708170571604ea727c255)](https://learn.sparkfun.com/tutorials/photon-weather-shield-hookup-guide-v11/discuss#comment-5e9efc999854fd4ee82e9234)