Member Since: February 15, 2008

Country: United States

  • So you can have coins of the same size and weight but with different material composition to denote the "values". That could be a fun way to mess with people -- some coins do "X" some do "Y" but only people with magnetic implants would be able to tell which coin is which.

  • How much does it weigh?

  • Remember that bit in physics class where they force you to state your assumptions for each homework problem? Now, rethink the above where gravity isn't the only force in play (i.e. perhaps friction plays a role, or perhaps the momentum of the combined arm and coin, etc.).

  • I really don't see computers driving cars for a good, long while. That is, unless it turns out people enjoy waiting for the car to decide the paper bag in the road isn't a threat. And the car can keep control during unexpected hydroplaning. And it can reasonably handle tailgating fools. And, well, you get the idea -- their are poorly-defined requirements for actual driving.
    More important than any technological potential or challenge, however, is the simple fact that people are intrinsic to the performance environment. Judging from my daily commute, about half of non-automated drivers will refuse to let automated drivers merge. And, about half the automation-enabled drivers with automation engaged will turn it off the second they get passed by the cunning, non-automated competition.
    The problem with automating cars isn't technology, it's social/cultural. Good luck fixing that "soon" unless you arm the computers and let Darwin sort it out.
    On the other hand, at least computers will use their turn signals. :)

  • Which is exactly why "blinky lights" (and other generally distracting things) are often illegal to put on cars. Seems obvious that bikes, wanting not to be targets, should avoid the same. Of course, I do all my riding off the road, and I don't care what the deer think.

  • Huh. Consider packaging these bundles for public sale?

  • Here are the gerbers, if you're curious. The thermals on the load pins might not be needed -- just as simple as un-checking the box on the polygon in Eagle to remove them.

  • "There is just no way this is going to work, but if you insist..."

  • In retrospect, the double-D battery for the magnetic seal on this hazard suit may have been a mistake.

  • Thanks for the example layout. On the top copper layer, the switch current is run through a couple pours, which is good, but then the pin connections are isolated with thermals. That would, it seems to me, "neck down" the effective copper width to carry the current to something like 80 mil (only two spokes per pour, per side connect to the pins on the relay). That's barely enough to carry 8A with 2.5oz copper. Removing the thermals, or increasing the size of the pour to get 4 spokes per side would be a good idea.
    See images

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