Update docs/assignments/week09.md, docs/images/week09/9DA99BBD-1A15-4799-ADB9-8D35F2F36108.jpg, docs/images/week09/IMG_9510.jpeg

Update docs/images/week04/IMG_8302.jpeg, docs/images/week04/IMG_8233.jpeg, docs/images/week04/IMG_9279.jpeg, docs/assignments/week04.md

Update docs/assignments/week13.md, docs/images/week13/ledattiny.jpg, docs/images/week13/schemagenerale ultimo step.jpg

Update docs/assignments/week13.md, docs/images/week13/attiny.jpg, docs/images/week13/steps.jpg, docs/images/week13/createthe connections.jpg, docs/images/week13/ATtinyBoardInstallation_1110.png

Update docs/assignments/week08.md, docs/images/week08/photosensor.jpg, docs/images/week08/CODEPHOTOSENSOR.JPG

Update docs/assignments/week08.md, docs/images/week08/arduino-uno_109_orig.jpeg, docs/images/week08/image arduino.jpg, docs/images/week08/1 test blink.jpg