Stephen A. Lawrence wrote:
Hours, not days. Toys that operate with D batteries run out in an hour
or so.
Wrong comparison. D-cell powered toys are typically doing
significant work. On the other hand, small induction motors that do
nothing but rotate do *not* run down a small battery in an hour or so.
I cannot see YouTube from my office so I do not know how big the
machine is or how much noise it makes. I was guessing based on the
schematic (and the size of the D battery in it) and the photo shown at ZDnet.
If the thing is as quiet and smoothly running as an analog clock then
of course it can run for weeks or months on a D battery. I was kind
of assuming that it was making a lot of noise, wind, and commotion,
like a small toy.
There was a link here to a very noisy toy magnet motor the other day.
Again, I can't check it from the office but whether the gadget is
over-unity or not, I must say, it is cute!
- Jed
