Television built from a tin can  A tin can and string telephone
just doesn’t impress the kids anymore. Luckily, now you can
 turn that tin can telephone into a television, as
[aussie_bloke] over on the Narrow-Bandwidth Television forum
showed us.  [aussie_bloke]‘s tin can TV is a mechanical
television, a TV where the scanning lines of a CRT is replaced
with a spinning disk with very small holes.(if you have a better
analogy in this day of LCDs, tell us). Instead of the usual
Nipkow disk, [aussie_bloke] used a small tin can.  The image
displayed on this TV isn’t very large; there are only 30 scan
lines and the pattern of the holes results in a display 10.5mm
in width by 7.85mm high. Basically, this display is microscopic
but it’s still very impressive.  Sure, you may not be able to
sit your kids down in front of this can-powered TV and let them
watch Yo Gabba Gabba for hours on end, but it’s more than enough
to impress those technically minded kids.  You can check out a
video of [aussie_bloke]‘s can TV after t