I am root! – Alex eReader

The Alex eReader has been rooted. This little handheld was the belle of the ball at CES 2010 when it came to eReaders. Now that is has been released into the wild it takes its place next to the heavy hitters that have already seen root access. If you’re unfamiliar, this device boasts a six-inch e-ink display and a 320×240 LCD touchscreen interface. Now that you can make it do your bidding, what are your plans for the $350 tablet? Let us know in the comments.

[Thanks Richard]

Microcontroller cheat sheet

micro-cheat-sheet

[Alex] put together this handy cheat sheet to make pinout lookups much quicker. It covers the most common chips from the AVR line, ISP headers, and FTDI cables.

64pixels are enough

64pixel

[Alex] put together this lovely minimal LED project. The square pixel matrix is soldered directly to the microcontroller in the same style as EMSL’s Micro-Readerboard. During the prototyping phase he used resistors to limit the current from the programming board. The final product doesn’t use resistors and manages the current draw by only turning on a single pixel line at a time. The illustrated assembly guide is very thorough and should help your create an equally compact device. Check out a video of it in motion below.

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Light to sound converter

lightnoise

[Alex] built what he calls a light to sound converter. It reacts differently depending on the type of light: remote controls, light bulbs, TV screens, etc. A photodiode is used with an amplifier to pick up the light change. That signal is dumped through a dual opamp. He swapped in several different types of photodiodes and settled on the BPW34 intended for visible light. He’ll be incorporating this into a much larger project.

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