Making an interactive twinkling winter cap

Step 3 Making the parts and fitting

After having knitted the cap (round knitting), the rim and the top, these are sewed together by hand using some of
the same wool. Of course the shape and size can be varied according to your fancy and the head of the wearer.

The led's are fitted to a separated cap of, in my case light grey fabric.
The led's are connected using the flexible strip principle, which saves a lot of wiring and PINS on the microcontroller.
(Essentially the matrix connection also used in led matrix block's.)
Making the flexible led strip has been described in one of my former instructables:
http://www.instructables.com/id/Making-a-flexible-ring-of-LEDs/

For this cap bright white led's were used.
Programming the led strip and using a LDR for interactivity is not too difficult using the program file and AVR studio:


The chip is on a small PCB and can be fitted inside the space under the top part of the cap.
The batteries can be either also hidden here of inside your coat.

Advisable for using the cap is making a third inner cap protecting the led connections from your beautiful and abundant hair!

When everything is tested and you are satisfied with the interactivity and the light pattern you can sew the parts together.