How-to: Make An E-paper Clock From Esquire Magazine

October 14, 2008 by Ian 30 Comments

If you’ve never heard about electronic paper, crawl out from under that rock and read up on the Sony Reader and the Amazon Kindle. E-paper is a flexible display made of color-changing beads that mimic ink-on-paper for easy daylight reading. The revolutionary thing about e-paper is that after it’s set, it stays that way without additional power.

This sounds great in theory, but Esquire’s cover is the first time everybody can afford to hack an e-paper display. We took the cover into the Hack a Day lab to document, test, and hack. In the end, we recycled it into something useful that anyone can build. We’ve got all the details on how the display works and what it takes to use it in your own projects. Read about our e-paper clock hack below. Continue reading “How-to: Make An E-paper Clock From Esquire Magazine” →

FM Stereo Transmitter

October 14, 2008 by Caleb Kraft 20 Comments

Reader [Mike Y] responded to our “What are you working on?” post with his stereo FM transmitter project. If you’ve ever used an FM transmitter for your portable audio, you know that even the best consumer level ones can be difficult to make sound decent.

He obtained an NS73M FM Transmitter module from Niigata Seimitsu Company, but it required a controller to handle pre-emphasis, modulation level, frequency, and power level. He decided on an Arduino which would also control his LCD.

His results were quite good, with decent range and superb audio quality. His total cost thus far is $35, but he still needs to put it in an enclosure. You can find complete schematics as well as source code and helpful tips on his site. You may also want to check out the regulations on broadcasting(pdf) as well.

Mounting An External Antenna On EeePC 900

October 13, 2008 by Caleb Kraft 13 Comments

[Terry Porter] added an external antenna to his EeePC 900. Initially, he mounted it on the side of the unit, but found that the location caused it to no longer fit in its carrying case, and made plugging in USB or Ethernet cables very difficult. His resolution was to move the mount to the rear portion of the case. His professional looking mount is definitely worthy of some attention. Check out the project for a breakdown and some great pictures showing the necessary modifications to make it fit.

If you’re going to crack open your EeePC, you may want to just go all out and add everything available.

Parts: 3.5mm Stereo Audio Jacks

October 13, 2008 by Ian 21 Comments

3.5mm stereo connectors for headphones and microphones are almost mandatory for audio projects. X1 (left) is a simple plug with connections for the audio channels (pin 2,3), and ground (pin 1). X2 (right) has pass-through contacts (pin 2,3) that divert audio to an internal speaker when headphones aren’t connected.

Here’s a breakdown of the audio connectors illustrated above. Continue reading “Parts: 3.5mm Stereo Audio Jacks” →

Playstation Tank Controller

October 12, 2008 by Eliot 6 Comments

[stuart] wanted a more intuitive way to control his rover platform than the software solution he had been using. He settled on using a Playstation controller with an AVR to operate the rover wirelessly. He found a couple references for talking to the controller using SPI on a PIC and adapted that for his ATMega88. The code is available on his site. He removed the rumble motors from the controller and stuffed the chip plus the transmitter package inside. The Linx TX/RX pair are mounted to pluggable boards so he can use them on other projects. A video of the tank in motion is after the jump. Continue reading “Playstation Tank Controller” →

Gas Powered Vacuum Sucks Hard Anywhere

October 10, 2008 by Caleb Kraft 36 Comments

[mdavis19] found himself in the middle of nowhere, with no electricity, needing a strong vacuum. That happens to us all right? His solution was to hack together a gas powered monster vacuum. He found a shop vac at a yard sale and promptly discarded the motor and filter. Some minor modifications to a leaf blower and a plywood mount finished the job. He now has absolute sucking power as long as he has fuel. He describes how this is going to be used for gold prospecting, though it would probably work just as well on pet hair. If you’re going to use one around the house though, you may want to find a way to mount a filter in it, and wear ear plugs.

Wireless Accelerometer Controlled RGB LED

October 9, 2008 by Caleb Kraft 10 Comments

[Andlier] sent us this cool little project. He has built a wireless accelerometer controlled RGB LED lighting system. Based on what a mouth full that is, it sounds complicated right? The end result looks fairly intuitive. Simply pick up the controller and tilt your hand to change the color of the light.

The controller consists of an Atmel AVR168 microcontroller. He doesn’t specify what transceiver he is using, but if you look in the comments, he notes that he added an antenna to it to extend the range. The part that controls the LED is based off of an Atmel AVR169 microcontroller hooked to some shiftbright LED modules.

Continue reading “Wireless Accelerometer Controlled RGB LED” →