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Ask HN: What have you built? (not software related)

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71–78 of 78 posts

Re: Ask HN: What have you built? (not software related)

#71

A 6" Dobsonian reflector telescope. Highly recommend it

You ground your own lenses? Wow! Patience of a saint.

No, I did not grind or polish my mirrors. The telescope by itself was a long-running project. It's almost masochistic to go from coarse to finer to finer finer grit.

Re: Ask HN: What have you built? (not software related)

#72

Earlier quoted context omitted.

You ground your own lenses? Wow! Patience of a saint.

Reflectors use mirrors; !lenses. I've ground a few too; Polished fewer and never completed any :)

Congrats! I can't imagine what it'd be like to actually make my own optics. Probably tough to get it to the right optical tolerances.

Re: Ask HN: What have you built? (not software related)

#73
http://www.flickr.com/photos/kilohanadesign/page2/

bunch of weirdness, but my hobby is building sprayed in facecoat glass fiber reinforced concrete pieces.

Most of my newer pieces are 3/4" thick and have EPS foam cores. My first attempt is the solid grey double sink in the bathroom which weighs at least 250lbs, I thought there had to be a better way, and there was. The desk with the imac on it is 28x60 and weighs 90lbs.

Sorry about all the other random pictures, especially if you get to see t-shirt diaperman on the beach.

Re: Ask HN: What have you built? (not software related)

#74

I built a device to catch the mail that comes through the slot in my front door. It had previously been falling on the floor and driving me crazy. One day I came across this nice product, http://www.amazon.com/SNAIL-SAKK-Mail-Receptacle-Slots/dp/B0... , and it seemed more than possible to make my own. So, using a fabric shopping bag from a local store, some Velcro and a sewing kit I managed to put my own together in…

What happens if the stack overflows?

Re: Ask HN: What have you built? (not software related)

#76
hmm: -a goban that I still use sometimes -a water filter for my turtles -an helicopter with Lego and the engine found in the broken typewriter (no, it can't fly BUT the helices turns :D) -a laser gun with the laser found in my DVD driver -my BED ! :D http://dl.dropbox.com/u/5247526/Nouveaux%20soleils.zip !

Re: Ask HN: What have you built? (not software related)

#77

I built a device to catch the mail that comes through the slot in my front door. It had previously been falling on the floor and driving me crazy. One day I came across this nice product, http://www.amazon.com/SNAIL-SAKK-Mail-Receptacle-Slots/dp/B0... , and it seemed more than possible to make my own. So, using a fabric shopping bag from a local store, some Velcro and a sewing kit I managed to put my own together in…

What happens if the stack overflows?

The "sack" holds quite a bit of mail, but the worst case scenario is that the mailman shoves the overflow stuff in there aggressively and the velcro gives way causing the mail to fall on the floor again like before.

Re: Ask HN: What have you built? (not software related)

#78
post #30

About a year ago, I spent a weekend building a letterpress. It's turned into a fun hobby. Printmaking is much more difficult than I'd have expected. One of the biggest challenges is maintaining a clean, inkless field. It's so easy to get ink on your hands, at which point it's nearly impossible to pick up a sheet of paper without smudging it before you're within three feet of the press itself. Registration (proper ali…

Anyone else likes to see which books people have when the bookshelf is not the subject?
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