Question 4.1 -- Concept Selection
Concept selection matrix:
So, top is:
B: Hanging on the cord
A: Spiral wire
J: Live wires
And yeah... I'm totally left brained.
Question 4.2 -- Prototyping
I will implement one prototype. Because the implementation is rather complex but the concepts are quite close.
Prototype of the concept B:
Video:
Bonus track: Process
Problem №1 is to use Arduino Mini Pro instead of Arduino Uno.Previously I had not deal with Arduino without USB before and it took me a long time.
The second problem was an independent supply power. I needed 5 - 12 V in a compact package. And the best that I came up with - is to use a pair of almost exhausted 3 V batteries from the old film camera.
Self made battery package:
Battery, contacts, Arduino and speaker.
Prototype is almost ready.
There needed some enclosure. I decided to use my daughters modeling clay.
Last detail...
Uphh...