LostBoyNZ:

 

It's probably weird that I've watched this, but there's an honestly interesting 18 minute video about a Sunbeam toaster from the 60s which detects how brown the bread is: https://www.youtube.com/watch?v=1OfxlSG6q5Y

 

That's a seriously ass-kicking toaster! If it didn't say in the video that it was out in the 60's and it's Sunbeam, I would probably think that Apple designed it. It's got no knobs, no levers, just the 2 slots. As an engineering enthusiast I find it clever indeed. Very interesting. Thanks for sharing.