Any changes here will be reflected in the design as well.
Now continue doing this for a few days till you have one complete coil!!!īut wait, if you look at the PCB file, which KiCad generates, in a text editor, you can see that each and every segment’s position is stored in the form of x and y coordinates along with some other information. If you have used KiCad, you may know that KiCad does not allow curved copper traces, only straight traces! But what if we join small straight segments in such a way that it creates a curve? Great. 30 turns - 4 layers (with a hole for the core).I decided to try the following combinations: To start with, I am using Carl's flexible actuator as a reference which is a 2 layer PCB with 35 turns on each layer. The plan is to design a test PCB with a few variations of coils. So in this Instructable, I will try to make a few variations of the coils and then test them to see which one works the best. This means that I could make the display smaller and less power-hungry.
Do check out his work! Anyways, it got me thinking if I could use the same PCB coils to push/pull the segments. He has made some awesome projects using it. It is basically an electromagnet on a flexible PCB. But then I came across Carl’s FlexAR project. Thanks to them, each digit draws about 9A! That’s a lot! Although providing that much current was not a problem but I knew it can be a lot better. The only thing that stopped me from doing it were the power-hungry electromagnets. Originally I had planned to make at least 3 or 4 such digits to display some kind of useful information on it. The project was so well-received, it even got published in Hackspace Magazine! I received so many comments and suggestions that I had to make an improved version of it.
A few weeks back I had made a Mechanical 7 Segment Display that uses electromagnets to push the segments.
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