Misc Hacks

4113 Articles

DIP Switch Adjusted Voltage Regulator

July 4, 2013 by 55 Comments

dip-settable-variable-supply

It couldn’t be simpler but you have to admit that a small adjustable portable power supply like this one will be really handy.

The main part of the PSU is an LM317 linear voltage regulator which we’re already familiar with. The output voltage is adjustable based on a voltage divider between two of the pins. The set of eight DIP switches allows you to tweak that voltage divider. Switch number one connects the 9-volt battery connector to the regulator, serving as a power switch. Each of the other seven switches adjusts the output voltage by 1.5 volts. The output of the regulator connects to your target device using alligator clips which are not in frame above.

[Jason] says he takes this with him when thrift store hunting for cheap electronics. It can mimic most combinations of Alkaline cells letting you power up electronic toys to ensure they work. But we would find it equally useful for getting that early prototype away from the bench supply for testing before finalizing a dedicated portable supply.

Continue reading “DIP Switch Adjusted Voltage Regulator” →

Family Pulls Together To Build Dad’s Casket

July 2, 2013 by 29 Comments

build-your-own-casket

In these modern times we don’t often hear about families building their own caskets. But this project log documenting the deceased’s brother and sons fabricating a top of the line casket is really heartwarming. You may be thinking that they wouldn’t be able to include all the features you’d find on a commercially produced model. However, we remember seeing an episode of How It’s Made about caskets and there’s not much more than carpentry and simple upholstery involved.

The build starts with a plywood box lined with thin wooden ribs for added strength. The group then wrapped it with thin strips of dimensional lumber (maybe flooring?) which look great after a coat of stain. We’re not sure where the metal brackets for the two side rails came from. If you recognize them we’d love to hear about it in the comments.

The bottom line here is that for families used to working with their hands this is a great tribute and a way to commune with each other after the recent loss.

[via Reddit]

 

Signmaking In Glass And Gold

June 25, 2013 by 6 Comments

Signmaking today isn’t what it once was. Where today a few vinyl letters stuck to a piece of plate glass is good enough for any storefront, there was a time when the signs in front of businesses were works of art involving many skills and dozens of tradesmen to create. [David Smith] is one of the last remaining old-school signmakers, and his creations are just as beautiful as the finely crafted signs of a century ago.

The techniques [David] uses to create his signs are as varied as the finished products are elegant. He cuts patterned grooves into glass with wheels made of diamond or ceramic and bends shaped glass over forms in a very large kiln.

Aside from cutting, shaping, and grinding glass, [David] also paints his signs – on the back side in reverse, building up his design layer by layer. The very first layer in some of his designs are gold leaf, a difficult material but [David] invented his own leaf applicator that makes the job much easier.

Truly amazing works of art, and certainly much more elegant than whatever plastic nonsense goes as proper signmaking these days.

Continue reading “Signmaking In Glass And Gold” →

Wherein Books Are Judged By Their Cover

June 15, 2013 by 4 Comments

Yes, Kindles are wonderful, a computer full of PDFs are awesome, and [Tim Berners-Lee] will probably go down in history as more important than [Gutenberg]. That doesn’t mean there’s not something intangible about books that brings out the affections of so many bibliophiles. Even a book filled with blank pages can be a work of art unto itself, and most of the time these volumes are handmade.

 This video of a hardbound volume made by Smith Settle bookbinders covers the entire process from words on a page to a finished book. No, they’re not using movable type; the folios are created using lithography, but sorting, gluing, sewing and binding the folios is done in much the same way as it was done in the middle ages.

Next up is a wonderful film from 1968 by Iowa state university on creating the gold tooling on fine leather-bound volumes. You’ll be hard pressed to find a book with gold tooling nowadays, but it’s still a technique accessible to the industrious amateur bookbinder.

First, gold leaf is applied to the leather spine of a book. Then, custom-made tools are heated to a few hundred degrees  and pressed into the leaf. The heat bonds the gold with the leather, and with custom-designed tools designs are burnt into the leather. After that, the excess leaf is simply wiped off, and a fine tooled leather book is born.

What’s really cool about bookbinding is the fact that just about anyone can do it. Go to a craft store, pick up some hardboard and paper, and bind yourself a book. You could make a blank journal, or for the nerds out there (myself included), make a hard bound volume of the NASA wiring standards.

Continue reading “Wherein Books Are Judged By Their Cover” →

[Jimmy The Torch] Making Blown Glass

June 5, 2013 by 5 Comments

Skip to about 2:30 if you just want to see the action.

Blowing glass is always so pretty to watch. The warm glow of the glass mixed with the light playing through the cool parts makes for a stunning visual environment, especially when you stop to think about the fact that this is potentially a very dangerous thing as well.

In this video [Jimmy the torch] starts off very conversational. At about 2:30 things shift a bit. Some music starts up, the camera work gets a little more serious, and the real glass blowing begins.

Hackaday Retro Edition Roundup

June 4, 2013 by 17 Comments

Retro

The Hackaday retro edition hasn’t been updated in a while, and for that I am very sorry. Still, digging through my email reveals quite a lot of very cool retro computers that were able to load the retro edition over the Internet, and it would be a terrible shame to let these awesome submissions die in my inbox. Without further adieu, here are the best retro computers that have been sent in over the last few months:

[Scott] got his Mac SE to load up the retro edition. This was a chore; after getting a serial connection from his SE to the outside world, [Scott] realized he didn’t have a browser on his retro mac. 800k drives are a pain, it seems. He eventually got everything running in a terminal session, and the retro edition loaded beautifully.

How about another Mac? This one is [Raymond]’s Mac II, the first not-all-in-one Macintosh. NuBus Ethernet card, Netscape 2.02, and 26 years of history behind this machine.

Here’s a weird one: it’s a Siemens interactive display originally used for a building management display. It has a 10 inch touch screen display at 640×480 resolution and runs Windows CE 5.0. After fiddling with some files, [Nick] managed to get the networking running on this machine and tried to load Google. Anyone who has played around with the class of machines we seen for retro submissions knows what happened next (nothing), but luckily [Nick] remembered Hackaday has a retro site. The rest is history.

[Kyle] has a really cool box on his hands. It’s a Compaq 486SX overclocked from 25MHz to 33MHz. 20 Megabytes of RAM, network card, and a Soundblaster 16 make this computer from 1993 a very respectable box for old DOS gaming. It can also browse the web with Arachne.

Finally, [cnlohr], the guy who made his own electron microscope  never mind, he’s still awesome and can manufacture glass PCBs at home, found an old green screen CRT while cleaning out a friend’s place. He hooked it up to one of his glass PCB AVR microcontroller things and did the usual text terminal fare; ASCII Star Wars with telnet and using lynx to load up the retro site. It’s only a 48-column display, but the retro edition is surprisingly readable. Very cool.

Building A Miniature X-ray Tube

June 2, 2013 by 30 Comments

tube

We’ve seen homemade x-ray devices and we’ve seen people making vacuum tubes at home. We’ve never seen anyone make their own x-ray tube, though, and it’s doubtful we’ll ever see the skill and craftsmanship that went into this build again.

An x-ray tube is a simple device; a cathode emits electrons that strike a tungsten anode that emits x-rays. Most x-ray tubes, though, are relatively large with low-power mammography tubes being a few inches in diameter and about 6 inches long. In his amazing 45-minute-long video, [glasslinger] shows us how to make a miniature vacuum tube, a half-inch in diameter and only about four inches long.

For those of you who love glass lathes, tiny handheld spot welders and induction heaters, but don’t want your workshop bathed in x-rays, [glasslinger] has also built a  few other vacuum tubes, including a winking cat Nixie tube. This alternate cat’s eye tube was actually sealed with JB Weld, an interesting technique if you’d ever like to make a real home made tube amp.