Solar Water Heater

December 14, 2009 by Mike Szczys 49 Comments

[Jake] built himself a solar water heater. The system has an 82 gallon insulated water tank and uses a solar collection grid made of PVC pipe. As the water heats, it rises to the top of the collector and runs into the tank while pulling colder water from the bottom of the tank back into the collector.

A sunny day yields temperatures around 130 degrees Fahrenheit. On a cloudy day the water can still be heated to about 90 Fahrenheit. This is about 19 degrees cooler that one might desire but the difference is made up by an electric shower head that heats as the water comes out. [Jake’s] system, seen in the video after the break, allows him to forgo the use of electricity on sunny days, and reduce its use by around half on cloudy days. Continue reading “Solar Water Heater” →

Make Your Own 3d Monitor

December 14, 2009 by Caleb Kraft 19 Comments

[youtube=http://www.youtube.com/watch?v=NektsV1EOic]

Don’t let this cruddy video fool you. [Sprite_tm] has done an amazing job here. He has put together a fairly simple way of creating your own 3d monitor at home. The basic principle is easy to get. You have to supply different angles of an object, on the screen, at the same time. [Sprite_tm] has done this by using transparency sheets, printed with a pattern to only show specific pixels. As you move your head, you see a different set of pixels, and therefore a different image. It’s simple, but it works. The system isn’t really new. Traditional 3d with polarized glasses uses a very similar setup. This system however seems like it is lacking in stereoscopic view however. When you move your head, you’re looking at a different angle, but still a 2d image of it. It would be really cool if he could somehow present each eye a different view, without polarizing filters and glasses. We’ve seen others do that with multiple screens, but that gets so clunky and can give most people a headache pretty quick. We also think we are about to see a flood of face tracking perspective modification, especially with project Natal and similar technology emerging.

New Pet, Project 413

December 14, 2009 by Jakob Griffith 23 Comments

I wonder if anyone ever mouses over images anymore. Oh silly me, xkcd reference.

[Jacob] sent in his teams final project, Project 413. While sounding like something straight out of an action movie, don’t worry, it’s not the next terminator. Rather a combination of an eBox (in place of an EEE pc), omni wheels, motors, batteries, and the finishing touch – a hamster ferret ball. If this is sounding familiar to a certain web comic, then right you are, as XKCD was their main inspiration. Sadly, the web cam and ‘having a soul’ functions didn’t make it into their version, but being controlled via Wii remote is always a plus. Check out a video after the break. Continue reading “New Pet, Project 413” →

RGB Keylock Shield

December 13, 2009 by Mike Szczys 17 Comments

Hackaday alum [Will O’Brien] cleaned up his messy breadboard with an RGB keylock Arduino shield. You may remember this two-part project from last year. It uses buttons backlit by an RGB LED to operate a door lock.

[Will] is still mulling over what type of kit options he will offer. We’re happy to see if the most important part, a laser-cut key bezel, will be available. This makes for a professional looking finish that made the original project difficult to replicate.

Capturing Bullet Speed

December 13, 2009 by Mike Szczys 20 Comments

Sometimes it’s amazing how slow our sense of time is. We find [Maurice’s] bullet capture system a great example of this. A pair of IR sensors spaced two inches apart can capture and calculate the speed of a projectile. Couple this with a user-input distance from the sensor to the target and a microcontroller can extrapolate the exact moment to trigger a camera to catch a bullet in mid-air.

As with his other projects, all the details on how to build and use this system are available for your perusal.

Arduino Development On OpenSolaris

December 13, 2009 by Mike Szczys 22 Comments

Part of the draw of Arduino development is that it is open-source and cross-platform. It is hard to believe that it took this long but OpenSolaris can be added to the list of operating systems that love to work with Arduino. Although not officially supported, the device drivers for were added in build 113 of the OS and a patched version of the toolchain is available for download.

[Thanks Alexander]

BiDi Screen, On (and Off) Screen Multitouch

December 12, 2009 by Jakob Griffith 18 Comments

[youtube http://www.youtube.com/watch?v=kXuxK6IeQfo&feature=player_embedded%5D

MIT is debuting their latest advancement in technology, a multitouch screen that also functions as a gestural interface. The multitouch aspect is nothing new, the team explains how traditional interfaces using LEDs or camera systems do work, but fail to recognize gestures off-screen.

Gestures are a relatively recent highlight with the introduction of projects like Natal or perspective tracking, but fail to work at closer distances to the screen. MIT has done what seems the impossible by combining and modifying the two to produce the first ever multitouch close proximity gestural display.

And to think, just a couple of months ago the same school was playing with pop-up books.

[via Engadget]