http://www.howtogeek.com/104486/diy-electronic-wire-stripper-gives-visual-feedback/
Just have a good supply of band-aids handy, just in case. 
Wow clever, but a bit of over engineering for a simple problem. The āidealā way to strip a wire is to almost cut through the insulation and then pull the insulation off. This prevents nicking the wire and tearing the last bit of insulation provides a natural strain relief for the wire; instead of the sharp edge of the cut insulation you wind up with a bit of taper where it was pulled.
Yea, what Jeff saidā¦ Plus, itās not going to work very well with multi-strand cable such as CAT5. If you hit the wire in that case then youāve already messed up 
Jeezā¦I think you guys are over-thinking this. Itās a clever way of integrating electronics with a common tool that most hardware hackers need. Geeky innovation, not necessarily something that is a perfect implementation. 
Ok. +1 for being clever.
However, I would call it an āoops! Iāve gone too farā detector rather than a āah! thatās the sweet spotā detector.
Shouldnāt we add a FEZ Mini to better drive the led ?
May be with an AnalogInput we would be able to find if the wire is too far into the blades (very low resitance)
And we could ring a buzzer
;D ;D
There is a hole between the bottoms of my two top front teeth that is 22 AWGā¦
@ Barbudor
Now THATāS the kind of can-do thinking I like to see!
@ Mike - LOL! I could feel the taste of copper in my mouth when I read that. Uggg!
Found Mikeā photo ;D ;D ;D
Looks more like 10 AWG.
@ Architect
Now THATāS funny. I donāt care who you are, thatās some funny stuff right there!
I didnāt mean to offend Mike, btw. No hard feelings, please ;D
Valen:
Sorry, but I canāt find anything in what you posted that would offend me. ;D
Offend? Heck, I would be honored to be compared to Jaws.
http://en.wikipedia.org/wiki/List_of_James_Bond_henchmen_in_The_Spy_Who_Loved_Me