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Open source decoder for digital shortwave data
Written by the machinegeek   
Monday, 22 November 2010 00:00

Authors: the machinegeek

If you tune around the shortwave bands you’ve probably heard various buzzes, high-pitched screeches and other annoying sounds. Many of these aren’t just noise, but amateur radio digital data transmissions.  These messages are surprisingly easy it is to decode using free open source software.

FLDIGI is a digital modem program for Linux, Free-BSD, OS X, Windows XP, W2K, and Vista. With FLDIGI you connect the headphone jack on your shortwave receiver to the audio-in on your computer soundcard. The GUI based program provides many digital mode choices, and even has a list of suggested frequencies to monitor along with the associated customary digital mode. While the program is designed for use with radios capable of both transmitting and receiving data, it nevertheless provides a fascinating experience for the shortwave listener to decode the data behind the “noise”.

We’ve tried other digital decoding software, and none works better than this open source alternative. Unlike some software packages, no external hardware is required beyond a stereo patch cord.  No patch cord? No problem. It can even take the audio from the radio speaker and process it via  the computer’s microphone! Our suggested frequency/mode for starters is BPSK31 on 14.070 MHz (upper sideband).

Read more: http://dangerousprototypes.com/2010/11/21/open-source-decoder-for-digital-shortwave-data/

Last Updated on Monday, 22 November 2010 13:17
 
The Trebuchet of the 21st century
Written by PCB Heaven RSS Feed   
Monday, 22 November 2010 00:00

Authors: PCB Heaven RSS Feed

image People usually design minigun-like paintball guns mounted on automatic targeting systems or other sci-fi weapons. This guy over here went a step... back! He designed a trebuchet...[Read more]

Read more: http://pcbheaven.com/opendir/index.php?show=461zr777xc1fd0d672

Last Updated on Monday, 22 November 2010 13:25
 
Kinect hack - Light Saber in real time!
Written by PCB Heaven RSS Feed   
Sunday, 21 November 2010 01:14

Authors: PCB Heaven RSS Feed

image This is the best Light Saber effect made with computer so far (except of course from the original!). Yankeyan hooked the Kinect on a PC and got a wooden stick for the saber. Then, he overlay the light glow on the stick to make the light saber. The result is very good, and more over, the whole process is done in real time. Imagine what Lucas would have done if he had this technology. Visit his youtube channel for info.

Read more: http://pcbheaven.com/opendir/index.php?show=496me813ngf48f19b2

Last Updated on Thursday, 25 November 2010 16:09
 
USB IR Toy record and playback application
Written by Ian   
Friday, 19 November 2010 00:00

Authors: Ian

Check out the beta version of a new app to record and retransmit infrared remote control signals with the USB IR Toy. Direct download here.

Features:

The USB IR Toy is $20, including worldwide shipping. Every sale supports this open source project.

Read more: http://dangerousprototypes.com/2010/11/18/usb-ir-toy-record-and-playback-application/

Last Updated on Friday, 19 November 2010 13:37
 
Lego laser 3D scanner
Written by admin   
Friday, 19 November 2010 00:00

Authors: admin

Phillipe Hurbain build this laser 3D Scanner based on lego modules. This device uses a line laser and a webcam to scan the object. The software used is David laser scanner. Check it out ..

Lego laser 3D scanner - [Link]

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Read more: http://www.electronics-lab.com/blog/?p=6864

Last Updated on Friday, 19 November 2010 13:49
 
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