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Here’s a fun science experiment you can do to create some AC current from a 9 volt battery.  Well, it’s not “real” AC current but still really cool.

via wonderhowto

The idea here is simple.  Stick an LED and 3V 2032 battery into a paper cube orgami thingee.

Great idea, well executed.

This little LED-lit cube is much more than just a paper lantern: It’s a translucent and flexible thin-film electronic circuit that hooks up a battery to an LED, limber enough to be folded into an origami box. And the coolest thing about circuits like these? You can make them at home.

via make

Wow, here’s a really creative way of making your own LED cubes!

The material used is Smooth-On brand “Clear Flex 95″. This is mainly sold as an industrial product, although smaller quantities (highly recommended! See below for why) may be availble from art supply houses. It comes in 2 separate jugs of syrupy liquid marked PART A and PART B, which are mixed together in a specific ratio by weight.

via neatorama

Here’s a great USB DIY Sound Card that NEEDS NO XP drivers. It’s plug-N-play. For a DIY project, very impressive and everyone should make their USB DIY “driver-less”.

Make a sound card is no more a complex issue. If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card. This sound card can be powered from USB port and has one stereo output. You don�t need to install any driver for Windows XP and Vista, because they are already inside. This is really plug and play.

Few months ago I have seen USB sound card called Alien DAC. The construction on the project web page inspired me to build this thing also.

via make

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Here’s a neat little DIY 4 by 4 matrix LED thingee…

A few years ago, when I finally got around to learning PIC programming, I decided to I wanted to create something that would run LED animations on a small 4×4 matrix. I liked the idea of the small 4×4 size because I was starting with a PIC 16F628A. This chip can not directly control the 16 lines necessary for an 8×8 matrix (unless you get fancy). Also the 4×4 arrangement just seemed easier to work with in terms of coming up with different patterns. And the patterns would require less memory. One frame on a 4×4 matrix is 16bits or just 2 bytes, but on an 8×8 matrix, a frame would require 8 bytes.

via make

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Lol, this has got to be the best DIY project I have seen this year. A white board plotter! I need this as I used my white board a lot but do feel if I had such an automated plotter, I could be doing a lot better at jotting down my ideas more clearly than what is now, simply scrambled jotting.

Well, using the Internet to take a look at the whiteboard isn’t that difficult: just take a webcam and point it at the board. Writing it will be a bit more difficult: there’s something like a plotter needed for that. I’d like the solution to be lightweight: while a completely Borgified whiteboard has its charm too, I’d like to alter mine as little as possible. That’s why I decided to use an idea I saw first at the 24C3: a way of hanging a pen using 2 rubber belts and two motors called a bipod. Problem was that I had no info of that device (I found the youtube-link while writing this article) so I had to work from memory.

[via] HackaDay

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Remember I did a G-Force Meter couple years ago? Here’s another cool DIY G-Force meter. The only difference it that it uses 7-segment display and a PIC18F series microcontroller.

After seeing so many applications using acceleromters making a simple project of my own with this cool sensor just seemed natural.
The main application of the accelerometer is either for sensing tilt or sensing acceleration. For this application A G-Force meter for my car will be made to see how many “G’s” I pull while driving.

via HackedGadgets

Related:

How to make a G-force meter in 1 minute!

Here’s a nice little circuit diagram for all those hardcore DIYers if you are trying to build a dual fan controller using an ATtiny45 although I’d never use this thing, I’d rather use a CUBLOC.

Over the course of a weekend, I cobbled together some leftover robot parts to create a simple dual-fan controller. The board turns on the first fan when the temperature reaches a user-adjustable dial setting, and it turns on a second fan if the temperature exceeds an additional 5 degrees Fahrenheit. With this method, only a single fan is used if the temperature can be kept under control with only one fan, but both fans will kick on if necessary.

[via] robotroom

Wow, this has to be one of the cooler DIY robots I’ve seen in a long time. Basically, it plays drums. Not real drums, but it plays your household stuff like vases as drums. Beautifully done, we give it an A+ for the creators. (Btw, we are not selling the blog for $1000, our readers say it’s too cheap! How much should we sell it for? j/k April FOOLS!)

Notice how the robot first plays on the object it finds (or is forced to find by the angry cameraman), plays a small beat, and records the beat it plays on it. Then this recorded beat is played again, and it starts to play on the object (an belt tracks and everything else it has),and also playing this sampled beat

[via] letsmakerobots

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