Update docs/assignments/week08.md, docs/images/week8/Untitled design.jpg,...

Update docs/assignments/week08.md, docs/images/week8/Untitled design.jpg, docs/images/week8/ezgif.com-optimize.gif, docs/images/week8/Untitled design (1).jpg

docs/assignments/week08.md

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 ## Some test on Electromagnet
 
 When an electric current flows through a conductive wire ring, it generates a magnetic field with distinct "South" and "North" poles. Reversing the direction of the current will result in a switch of the South and North orientations. If a magnet is introduced into the ring, it will experience a noticeable attraction or repulsion depending on the direction of the current passing through the wire. This interaction causes the magnet to move or jump when the appropriate current (in the correct direction) is applied to the wire.
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+![](../images/week8/Untitled design.jpg) 
 ![](../images/week8/ezgif.com-resize.gif)
 So we divided into groups of interest: Neopixels, Thermochromic Ink and Shape Memory Alloy. 
 
 I was in the Shape Memory Alloy with Louise and Charlotte as it seem very touching for me the moving electronic petals of fabrics, as we had a possibility to make not-alive things move and make them breathe. 
 
 
+## SMA | Shape Memory Alloy¶
+
+In order to work with Shape Memory and electricity, you can use a special wire called flexinol. This wire is known as an actuator because it can contract (shrink) by about 10% when it gets heated above a certain temperature. It took some time for us to understand how it works, but we finally figured it out. Just like a heating element, the flexinol wire needs a circuit driver to provide enough power.
+
+When using flexinol, you need to decide on the shape you want it to have initially. Make sure the wire remembers this shape by heating it to about 400°C while it's in that desired shape. To check if it's working correctly, you can put it in a glass of hot water. It should go back to its original shape if everything is working properly.
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+![](../images/week8/Untitled design (1).jpg)
+![](../images/week8/ezgif.com-optimize.gif)