Let's make a pancake coil for wireless powered LEDs
4,521 views · Published 14 March 2014 · 8:07 · Indexed 27 October 2026
Channel: GrandadIsAnOldMan · 2014 · Science & Technology
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 https://youtu.be/Mjtd2z2_RXc This is slider2732's original Simple Wireless Electricity System https://youtu.be/dSUGXCWIVoI Some related playlists Cheap electronic kits https://www.youtube.com/playlist?list=PLA5a2xPRSrB0ErqyWzQTL6yk8m0FxkD0_ Electronic Projects playlist https://www.youtube.com/playlist?list=PLA5a2xPRSrB00lxaX8BD46F1QDJTe7Em4 Simple electronic projects playlist https://www.youtube.com/playlist?list=PLA5a2xPRSrB0qd7Hrqoc3II0OU-bx64TA Simple projects playlist https://www.youtube.com/playlist?list=PLA5a2xPRSrB2HXSqJPl6Kv9J_pHHp4cIF My Channels GrandadIsAnOldMan https://bit.ly/2T3x6RX GrandadsOtherChannel https://bit.ly/2yW5uYb Put a rubber band on it https://bit.ly/2T3OF4j Number4 https://bit.ly/3cG4fuZ You can help keep my channel running with coffee and cakes at Patreon https://bit.ly/35XFasL If you don't like Patreon, you can use Kofi instead https://bit.ly/3dNusI9 Merchandise on RedBubble https://rdbl.co/2yJv56H Merchandise on Cotton Cart https://bit.ly/2xZymOP Merchandise on Teespring https://bit.ly/2Zby02T Twitter https://bit.ly/3fMUgFN Facebook https://bit.ly/3csbruk Pinterest https://bit.ly/2WTuuXP Instagram https://bit.ly/2WPLa2F Thingiverse https://bit.ly/35WfSem Tinkercad https://bit.ly/2WUrM4q Playlists GrandadIsAnOldMan https://bit.ly/3dI9mdV GrandadsOtherChannel https://youtube.com/@GrandadsOtherChannel/playlists Putarubberbandonit https://youtube.com/@Putarubberbandonit/playlists Number4 https://youtube.com/@Number4GIAOM/playlists I have thousands of videos on YouTube, to find one try my search guides https://youtu.be/ceBSOoOHcgw or https://youtu.be/Zj4UgwkwYRk I am happy for you to show my content as part of your projects or in public settings, as long as you clearly credit GrandadIsAnOldMan. Please do not copy my video content and pass it off as your own. #GrandadIsAnOldMan #GrandadsOtherChannel #Putarubberbandonit #Number4
