Multiple nested bins, each with a grating on the bottom. The second-lowest bin would have the smallest holes (the lowest bin must be hole-free), and bins above that would have ever larger holes.
To sort your LEGO, dump it in the top bin and shake for a while. Then separate the bins. The smallest pieces will be in the bottom bin, the largest pieces in the top bin, with medium pieces in between.-- AntiQuark, Oct 20 2009 Full-baked http://www.box4blox.com/As you describe [bdag, Oct 20 2009] Hmmmm, what about the long, thin, smooth topped ones, that are only a third of a brick in height? Wouldn't they defeat your sorting mechanism, and fall through to the bottom anyway?-- kaz, Oct 20 2009 Shouldn't there be a color and type sorter instead?-- Rmac, Oct 20 2009 [Wouldn't they defeat your sorting mechanism]
Probably, but after using it a few times, you'd learn which bins certain pieces would end up in.
[Shouldn't there be a color and type sorter instead?]
I don't think there's a mechanical way of sorting by color or type. You'd need some sort of electronic camera.-- AntiQuark, Oct 20 2009 AntiQuark! The pieces naturally sort this way when you shake a box of them.-- daseva, Oct 20 2009 Of course if you really wanted to know where all your pieces were you'd sort them by size, shape, and colour, and just keep them segregated anyway.......-- kaz, Oct 20 2009 [kaz] I agree, I've explained that to my kids many times :)-- AntiQuark, Oct 20 2009 But what kind of kid keeps his toys that well organised?-- Rmac, Oct 20 2009 The kind you worry about.-- 8th of 7, Oct 20 2009 Baked and baked. Check out the Box4Blox website and enter yourself to win one.-- bdag, Oct 20 2009 [bdag] Cool, I was unaware of that, thanks for the link!-- AntiQuark, Oct 20 2009 Most of my old Lego bricks are stored by usefulness, in model format.-- kaz, Oct 20 2009 I like to store mine autobiographically.-- daseva, Oct 20 2009 You need to get out more and meet people your own age, [kaz].-- 8th of 7, Oct 20 2009 Hey, I didn't say I played with them. They live in the attic somewhere.-- kaz, Oct 20 2009 I also happen to have a perfectly functioning social life thank you very much, I just can't remember where i left it.Besides, we can't all just absorb more company when we need it.-- kaz, Oct 20 2009 When I used to have lego, I kept it in a giant plastic tub, and the only obsession was not permitting unused pieces to be joined together. The pleasure of "rooting" though the tub with both hands in search of a vital brick, which you know you possess only one of!
Anyway, for this application I vote for a small robot arm with camera, to individually pick pieces and place them in appropriate chutes.-- pocmloc, Oct 21 2009 random, halfbakery