Comments on: Impact of the Magnetic Levitator https://caram.cl/impact-of-the-magnetic-levitator/ Electrical Engineer, Integrated Circuit Designer, Software Developer, Maker, ... Sun, 28 Apr 2024 05:07:00 +0000 hourly 1 https://wordpress.org/?v=4.2.38 By: jpcaram https://caram.cl/impact-of-the-magnetic-levitator/#comment-2217 Mon, 16 Mar 2015 14:12:00 +0000 http://caram.cl/?p=189#comment-2217 There is an infrared LED shining into a photo-transistor. The metal piece is partially obstructing the light path. If it goes any higher, there is less light shining onto the photo-transistor, therefore conducts less current. If it goes any lower it will expose the LED even more, causing more current to flow. The interesting fact there is that there is no need for a precise measurement over a large range, but only around its intended position.

I don’t really know why it is rotating, but it is certainly an unintended behavior.

]]> By: jpcaram https://caram.cl/impact-of-the-magnetic-levitator/#comment-2216 Mon, 16 Mar 2015 14:03:34 +0000 http://caram.cl/?p=189#comment-2216 There is an infrared LED shining into a photo-transistor. The metal piece is partially obstructing the light path. If it goes any higher, there is less light shining onto the photo-transistor, therefore conducts less current. If it goes any lower it will expose the LED even more, causing more current to flow. The interesting fact there is that there is no need for a precise measurement over a large range, but only around its intended position.

I don’t really know why it is rotating, but it is certainly an unintended behavior.

]]> By: MichaelC https://caram.cl/impact-of-the-magnetic-levitator/#comment-2215 Sat, 14 Mar 2015 19:19:00 +0000 http://caram.cl/?p=189#comment-2215 Very Awesome. How did you measure the height? And why is the levitee rotating?

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