Hackaday Links: December 21, 2011

The “Little Drummer Boy” On a Scanner and Drum:

There’s little more information on this hack, however, it’s quite interesting seeing an automated drum and a scanner playing a familiar Christmas tune.  Check out the video of the duet in action!

A Radial Engine Model:

Through the process of experimentation, two “radial engine models” were produced.  The engine model shown above uses a gear-reduced motor to power it.  The other model uses CNC-cut gears and a motor from an air freshener!

Tips and Tricks on Repairing LCD Monitors:

So do you have a broken LCD monitor? Using techniques described in his post, [Neoxity] claims to have been able to repair 50 out of 60 broken monitors using techniques described on his blog.

Flex Cables:

While we’re on the subject of [Neoxity's] page, why not check out his discussion on “flex cables” used for DIY.  Like the humble resistor, they’re not glamorous, but you’d be hard pressed to find an electronics assembly without one.

Illegal Numbers:

Although not a hack in itself, the “illegal number” is a really interesting concept (mentioned by one of our readers in the comments).  Since all data and programs can, at their core, be represented by a series of 1s and 0s, this can also be interpreted as a number.  Thus, some numbers actually represent copyrighted or trade secret data that would be illegal to possess.

Hackaday Links: October 28th, 2011

An accidental radial engine

Hack A Day’s very own [Jeremy Cook] was trying to figure out how to push four ‘arms’ out one at a time. What he came up with is a very nice model of a radial engine. Everything was cut on a CNC router and a motor from an air freshener provides the power.

Using a candle to produce light

[Chris] sent in his Candela Amplifier. It’s a Pentium 4 heat sink with a very bright Cree Xlamp LED attached to the base. A bunch of Peltier thermoelectric units are attached to the underside of the heat sink. Put the whole thing on top of a candle, and you can light a room. With a candle. Oh, he’s selling these, by the way.

Objectification and video games?!

We really feel sorry for our lady readers. Guys have so many choices for Halloween costumes, but just about every costume available for women can be reduced to, “Sexy [noun].” Whelp, here’s the Sexy Game Boy, just in time for Halloween. [kazmataz] gets a few bonus points because she went with the DMG-01. It’s better than Sexy Chewbacca, so she’s got that going.

Prototypable 32-bit uCs

[Ng Yong Han] wrote in to tell us about some newish 32-bit PICs that are floating around. The datasheet for the PIC32MX1xx/2xx chips is pretty interesting – USB support and an audio and graphics interface. Oh, they come in PDIPs for ease of prototyping as well. We haven’t seen much from the PIC microcontroller faction recently (Atmel is winning the holy war, it seems). Anybody feel like building something with these?

Makerbot dual extruder


[Lomo] at TU-Berlin is taking a class in rapid prototyping. He built a second print head for his department’s Makerbot Cupcake with a few other students. The result are pretty impressive, although from what we’ve seen, it’s generating the G-code that’s a pain in the butt.