/challenges-projects/design-challenges/wireless-power-i/b/blog/posts/proof-of-concept-and-efficiency-testToday I tested whether it was possible to charge a LEGO train from beneath the tracks. At least, I checked whether the receiver coil would be positioned correctly with reference to the transmitter coil. To see whether the power transfer was working Ien-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/wireless-power-i/b/blog/posts/proof-of-concept-and-efficiency-testMon, 22 Oct 2012 21:43:18 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e2be4768-a57b-4c14-ab12-af1061eaa08elfa5550<p>Great progress Viktor! Looking forward to see the video with the train stopping in the &#39;wireless&#39; station :-)</p><img src="https://community.element14.com/aggbug?PostID=15550&AppID=114&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/design-challenges/wireless-power-i/b/blog/posts/proof-of-concept-and-efficiency-testWed, 17 Oct 2012 19:05:50 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:e2be4768-a57b-4c14-ab12-af1061eaa08eDAB1<p>I agree, your power transfer will be more efficient if you can reduce the distance between the Tx and Rx coils.</p><p>&nbsp;</p><p>You might get fancy and put the Tx coil on a spring loaded platform that would move the coil up to the Rx coil using the train weght to trigger the lifting mechanism.&nbsp; You would probably use this approach in an upscaled implementation.</p><p>&nbsp;</p><p>Just a thought,</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=15550&AppID=114&AppType=Weblog&ContentType=0" width="1" height="1">