Update README.md

README.md

@@ -208,6 +208,29 @@ Three spacers separation between the coil membrane and the magnets plate. This v
 
 First iteration was a success!
 
+## Stereo Planar Speaker
+
+We made some more speakers today.
+
+<img src="img/wireplotting-101.jpg" height=400px>
+
+All the parts of one planar speaker.
+
+<img src="img/week13-02.jpg" height=400px>
+
+Coil membrane of the speaker.
+
+<img src="img/wireplotting-100.jpg" height=400px>
+
+An assembled planar speaker.
+
+<img src="img/week13-01.jpg" height=400px>
+
+Test of the stereo speaker with coil membrane pasted on the plastic. 
+<img src="img/output.mp4" height=400px>
+
+If you compare this video with the two spacers one, you will notice that it seems to have better sound with a stiffer coil membrane.
+
 ## Links:
 
 - [Planar magnetic headphones](https://www.innerfidelity.com/content/how-planar-magnetic-headphones-work)