Technology

Build-it-yourself cell phones

Build-it-yourself cell phones

Patel 550X425Here’s more about the DIY cell phone project” Surj Patel is building his own cell phone, bit by soldered bit. It’s not easy. It starts with parts that cost around $400. Then Patel and his partner, Deva Seetharam, have to write code to run on the tiny Linux-based computer that he’s hoping will serve as the brains of his new phone. So why bother? After all, it’s not like cell phones are hard to find or terribly expensive.” [via] Link.

Write energy-efficient C code

Write energy-efficient C code

H264DecoderBrian sent this along, something to consider if you’re working on small form factor devices…It’s good for the environment, good for your batteries, but it’s weird to think about an algorithm’s energy efficiency (it’s not just CPU cycles they look at, but memory access as well) “PowerEscape has added a new utility to its development toolsuite. “Insight” aims to reduce power consumption by improving the “data efficiency” of C-language code. The company says improving data efficiency in the initial stages of development yields higher performance for the same amount of power.Link.

HOW – TO: Getting Started with RSS

HOW – TO: Getting Started with RSS

62715536 57Dd85E1D6 OPaul writes “If there’s one word to describe my latest article, it’s comprehensive. Focused on using RSS as a means to save time in one’s daily routine, I take the reader through what RSS is, why it should be used and how to use it. I go through the installation, configuration and usage of RSS in Thunderbird, Google Desktop, RSSOwl as well as web-based feed readers with Google’s Personalized homepage, My Yahoo!, and Bloglines. As with all of my articles, there’s screenshots-a-plenty.” Good one to send to the non-RSSers, or if you’ve always wondered what those XML and RSS buttons are on MAKE. Link.

Beck video with Sony QRIOs now live…

Qrio
Mocapitator let us know that the new Beck video we mentioned, starring the Sony QRIO robots is now live on the Beck site. I just watched it and I think the QRIOs are a lot more interesting than their role in the video. I worked on a few Sony projects in the past in Japan and China, some with the QRIOs and they’re creepy-cool. If you’ve seen the QRIOs in action, then this video might not seem that interesting, it’s pretty much their dance routine when they’re out in public – but still fun to watch. Link.

HOW TO – Spinning LED

HOW TO – Spinning LED

Spinning MarqueeGreg sent in this great LED project that spells words or makes patterns when it spins “The way this works, is you have an EEprom (electronically eraseable programmable read only memory). This stores data on different lines. You retrieve this data by feeding it binary numbers, (ie. 1=0001, 2=0010, 3=0011, 4=0100, and so on). Each line of code has 8 bits of data, and directly corresponds to how the row of LEDs are lit up. If you put in 10000001, then the top and bottom led would be on. This is kind of tricky to figure out, but you have to make a grid. Since I am using a 4 bit counter, I have a possibility of 16 addresses. So to make a letter, you have to draw up a 16X8 grid, and color in the pixels you want.” Link.

HOW TO – Make an all weather Wi-Lan enclosure

HOW TO – Make an all weather Wi-Lan enclosure

Phto0145Chris sent this how-to in from Grynx contributor Dan “This box will house my proprietary Wi-Lan HP45-24 radio unit and set as a client, a 2.4ghz 500mw HyperLink Amplifier connected to a Linksys WRT54G with a third party firmware and set as an access point, the Wi-Lan HP45-24 radio will be the main link back to my base radio. The whole idea of this enclosure is to be as “modular” as possible, i.e. if the PSU blows-up I can simply remove the PSU and replace it, OR if I need to relocate the whole box, I can simply unscrew all the antenna and take it away with me.” Link.