/challenges-projects/design-challenges/wireless-power-ii/b/blog/posts/waterproofing-marine-equipment---03---unboxing-the-kitYesterday morning I finally received my Demo Kit! Hurray! Here are a few pictures of the kit and my first impressions: When I started opening the packet it felt like a Matryoshka doll : a box inside a box inside a box! It certainly was well...en-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/wireless-power-ii/b/blog/posts/waterproofing-marine-equipment---03---unboxing-the-kitTue, 25 Mar 2014 23:06:34 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:80aecfad-82ca-4b3c-a8ea-4d66342e2148hlipka1<p>Until you wrote about it, I didn&#39;t recognize this noise. But I listened closely again, and can hear it to.</p><p>My informal investigation says it comes from C14+C15 on the receiver board: take a sheet of paper (about 10x10cm), hold it at one edge with tweezers, touch some components with the opoosing edge and listen where it gets louder (it helps when the paper bows a little to have firm contact). Works only with the LED board taken off, obviously.</p><img src="https://community.element14.com/aggbug?PostID=22093&AppID=115&AppType=Weblog&ContentType=0" width="1" height="1">