Let's make a pancake coil for wireless powered LEDs

My wife wants to put some LEDs inside a glass vase we were given for Christmas and I thought it would be good if I made a couple of bifillar pancake coils so that I could power the LEDs wirelessly from outside the vase. I did a quick search on YouTube for guidance and found plenty of videos. The one that inspired me the most was by Mongrel Shark because he explained it in a very straightforward way. I didn't follow his example exactly, but close enough and it works for me, so I am happy. I used hot glue to hold the coils together which will be OK as long as they don't overheat. -------------------------------------------------------------------------------------- UPDATE 14th March 2014 Mongrel Shark added this comment ---------------------------------------------------- Glad it helped. Check out Sliders original SWES video ( Google video: "Simple wireless electricity system"), for a really simple driver that uses a single transistor and no other components for short range wireless transfer from flat AA's and AAA's etc. Over 1v input and you just have to add a resistor. I have a heap of SWES videos too. They have their own playlist :) --------------------------------------------------- UPDATE 14th March 2014 slider2732 did the original work on this and I have added his comments below. ---------- Yep, that's my SWES - Open Sourced so folks can build their own wireless electricity systems at home. All credit to N. Tesla for the coil: Patent 512,340 MogrelShark (Joel) did some great scope work for me and made vids like the one you mentioned to help folks along. Use a 1.5V battery and no resistor for no overheating - was designed as the simplest system possible, hence 1 transistor, 2x coil, 1x AA. Add a diode from the battery Positive to reduce current used if using a 9V. Also a 100ohm resistor from the Negative to the transistor Emitter helps. Play with values based on individual transmitter coil. Great build :) ------------------------------------------------------------------------------------- Components - 10m telephone extension lead String of decorative LEDs 2n2222 transistor - this may not be the best choice as mine is overheating 9v battery - this may be why my transistor is overheating, so less may be better I used a 10k variable resistor to adjust the circuit Tools - Soldering iron wire cutters/strippers Hot Glue Gun CD Spindle This is Mongrel Shark's pancake coil video /watch/cXR_2z2dtjMd_ This is slider2732's original Simple Wireless Electricity System /watch/IoVIWCXGUSdGI Some related playlists Cheap electronic kits /playlist/PLA5a2xPRSrB0ErqyWzQTL6yk8m0FxkD0_ Electronic Projects playlist /playlist/PLA5a2xPRSrB00lxaX8BD46F1QDJTe7Em4 Simple electronic projects playlist /playlist/PLA5a2xPRSrB0qd7Hrqoc3II0OU-bx64TA Simple projects playlist /playlist/PLA5a2xPRSrB2HXSqJPl6Kv9J_pHHp4cIF My Channel page /c/GrandadIsAnOldMan Oldest videos /c/GrandadIsAnOldMan/videos?flow=grid&view=0&sort=da Most Popular /c/GrandadIsAnOldMan/videos?sort=p&flow=grid&view=0 Newest videos /c/GrandadIsAnOldMan/videos?sort=dd&view=0&flow=grid Playlists /c/GrandadIsAnOldMan/playlists?flow=grid&view=1 I have thousands of videos on YouTube, to find one try my search guides /watch/wgcHOoOSBecSH or /watch/kRYwkwgU4jZUw My "GrandadsOtherChannel" channel is generally where I will host the videos that give extra detail or longer versions of the videos I post on my main channel /c/GrandadsOtherChannel Facebook https://www.facebook.com/grandadisanoldman/ Merchandise - Check both of these links if you are interested as the prices will vary and the shipping charges will be different. http://www.redbubble.com/people/grandadiaom/portfolio http://grandadisanoldman.cottoncart.com/

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