Wifi Hotspot Powered By Wind Turbine And Solar Panel

July 20, 2010 by Caleb Kraft 19 Comments

[youtube=http://www.youtube.com/watch?v=z-MZmQqxrYM]

Students at the Rochester Institute of technology have put together this WiFi hotspot that is powered by a wind turbine and a solar panel. It gets its signal through a parabolic antenna pointed at a near by building and repeats it for use in the vicinity. They are using a 30W solar panel, along with a 1/4 horse power 90V DC motor to charge two 6V batteries in series. On a windy day, the turbine has yielded 120W. Something interesting to note is a comment they made about blades. Though the ultimately decided to mimic a commercial design for wind turbines, they found the most efficient to be a single wood prop. Unfortunately, that prop was destroyed.

[via HackedGadgets]

Stretch-bike

July 12, 2010 by Mike Szczys 26 Comments

This long bike is built for haulin’. After needing to find a truck to transport his welding equipment (ironically in order to build another bike) [Nick Johnson] decided it was time to make a two-wheeled cargo transport. He extended the frame in order to add a cradle in the front. Eventually there will be sides on that box but for now it works like a charm for transporting his groceries. With the long wheel-base this should be pretty stable as long as you balance your cargo. We’d certainly be more apt to try a ride on this rather than the double-decker death-trap from a few weeks ago.

Whole House Current Monitoring

July 7, 2010 by Mike Szczys 46 Comments

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

[Debraj Deb] put together a current monitoring device that interfaces with the circuit box at his house. The system is controlled by a PIC 18F4520 and uses an LM358 Op-Amp to rectify the AC signal, as well as an MCP6S21 for range adjustments for detecting both high or low current loads. The data displayed on a character LCD includes average, RMS, and peak current. For now the data is saved to an EEPROM and can be dumped using a serial connection but [Debraj] plans to add a GSM modem so he can send energy use data to his cell phone.

[Thanks Ganesh]

OLED Hack Saves Juice On Nexus One

July 2, 2010 by Mike Szczys 35 Comments

Want to really stretch the battery life on your phone? If you have an OLED display [Jeff Sharkey] may have the answer. He did some testing with his Nexus One to see if color alterations can save on current. Darker colors draw less amperage and he found that the red pixels are the most efficient. He did a little work with SurfaceFlinger, which handles the display on Android devices to make this easy, but what will you get by going red? He measured that using only the red pixels dropped the current use down to 35% of what the full color display was pulling. This reminds us of those efforts to save energy by running a black background with Google. Whether you use it or not his post is an interesting read.

Tomato Irrigation

July 2, 2010 by Mike Szczys 31 Comments

No hack will be more readily accepted by the significant other more than an automated vegetable watering system. [Jouni’s] homemade rig keeps those tomatoes happy with just the right amount of moisture. A bucket serves as the reservoir, a submersible pump gets the water to the soil through a bit of plastic hose. An Arduino monitors the soil sensor, watering and tweeting about it when things dry out too much. Don’t miss the soil moisture sensor post if you need some tips on how to get that end of things working. The rest is pretty straightforward.

Houses To Go From Leftover Scraps

June 28, 2010 by Mike Szczys 22 Comments

[Derek Diedricksen] builds nomadic houses from left over building materials. Some are large enough to haul behind a vehicle or, in the case of the one above, small enough to tote around like a wheelbarrow. We love them because not only do they reuse material that might commonly hit the landfill, but they look good. Check out the first couple of episodes from the Yellow House series after the break. Then take some inspiration from [Derek’s] success and see if you don’t already have enough in your junk pile to get started.

Continue reading “Houses To Go From Leftover Scraps” →

Most Useless Machine Loses Carbon Footprint

June 16, 2010 by Mike Szczys 23 Comments

[youtube=http://www.youtube.com/watch?v=lxyQ3PFbK9Y]

[Clayton Boyer] took the electricity out of the useless machine, making one that runs like a clock. To this point, we’ve always seen these useless machine use electric motors. [Clayton’s] clever design uses a wind-up spring and a series of wooden gears to bring the fun, making it a great companion for the binary adder you built. The video above shows the inner workings and the design plans are for sale. We’d love to print out the parts or perhaps just laser-cut them from wood like the legs of this spider bot.

[Thanks llwynog]