Commit 1977fce5 authored by Sam Calisch's avatar Sam Calisch
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Update README.md

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# Plotting membrane speakers
## Overview
Project for wire plotting of membrane speakers. for wildcard week in mas.836 2018
- Sam Calisch
......@@ -14,26 +16,34 @@ We will use a custom magnet wire plotting tool for the Zund cutter to plot coils
<img src="https://calischs.pages.cba.mit.edu/kiri-tww/img/flatcoil/flatcoil-40awg-microscope.jpg" height=250px>
<img src="https://gitlab.cba.mit.edu/calischs/kiri-tww/raw/master/img/flatcoil/flatcoil-cut.jpg" height=250px>
## Simulation
Two approaches: Coil-magnet, and coil-coil.
### Coil-coil
The coil-coil topology relies on coils to generate all magnetic fields, not just the time varying one.
<a href='comsol/coil-coil-speaker.mph'>comsol file</a>
<img src="img/coil-coil-flux.png" height=200px>
<img src="img/coil-coil-force.png" height=200px>
### Magnet-coil
The coil-magnet topology (planar magnetic) is used for some high end headphones. It can produce significantly more force than coil-coil, even with very thin magnets.
<a href='comsol/magnet-coil-speaker.mph'>comsol file</a>
<img src="img/magnet-coil-flux.png" height=300px>
<img src="img/magnet-coil-force.png" height=300px>
**Links:**
## Links:
- [Planar magnetic headphones](https://www.innerfidelity.com/content/how-planar-magnetic-headphones-work)
- [Ben Katz's Planar magnetic headphones pt. 1](http://build-its-inprogress.blogspot.com/2017/08/planar-magnetic-headphones-part-1.html)
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