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This was taken on my friend Hardik's Canon 60D. Music is from the band State Radio and the song: Wicker Plane.

http://itunes.apple.com/us/album/year-of-the-crow/id395632644

I used ffmpeg extensively to get the 60fps video to slow-mo 30fps, then ffmpeg again to extract the audio to wav, then Sound Studio (mac app) to resample the audio to the same speed as the video. Next I used Sound Studio to splice, in rythem, the intro, solo, and final few seconds of 'Wicker Plane' together, then mix it together with the slow-mo sound of my quad and just imovie to put together the timeline of video.

Using an Phillips NXP LPC20148 ARM7 processor, a Nintendo Wii motion+, and some xbees I've made a really stable platform for quads. (mode details here) It is running FreeRTOS which makes it very expandable in the future. My old frame flew great with it, but I wanted something smaller. Enter my new carbon fiber mini-quad:

New video of my flying my quad!

Flying my os-copter quadcopter inside.

See more Photos.
My writeup here.
Browse my Code: on my svn browser.

This semester I built my own open source flight software for quadcopters using the NXP LPC2148 ARM 7 processor on an FreeRTOS system. This allows the inherently unstable quadcopter to fly as a human controllable helicopter with only the addition of a wii motion plus as a gyroscope sensor for rotational acceleration. Also: details and photos of my first remote.

Making a MP3 player from scratch using a Phillips NXP LPC2148 ARM7 board, the real-time operating system FreeRTOS, and a laser cutter.

Part of San Jose State University's CMPE 146, Embedded Microprocessor System Design.

Simple, effective, lightweight, and fast, this MP3 ID3v2 reader is the ideal way to go if you're running an embedded system running C.

Simple, effective, lightweight, and fast, this MP3 ID3v2 reader is the ideal way to go if you're running an embedded system. See the source/download here. Click read more for a demo project and more information.

Background: I'm writing a full-featured mp3 player for the SJSU class CMPE 146, Embedded Microprocessor System Design, that runs on the LPC2148 ARM7 Board from sjvalley. The project is running RTOS and has reads files from a SD card streams them through an MP3 decoder to a DAC and finally your headphones.

The project is coming along nicely but I wanted a way to read ID3 tags so read_ID3_info() was born.

I'm calling this quadcopter design The Crossbow because of the huge number of people who have thought that's what it was while I'm carrying it around campus.

Right now I'm just testing it and working on the software using only two rotors. This design is modular so I can attach whichever arms I want.

Here's an idea for what I started with in the design process:

This is the flight computer module:

And the body with the two arms attatched.

That title's a mouthful, any yet it's not enough. There are so many names for these modules, a better title would be Fast two way Xbee ZigBee Series 2 Znet 2.5 Serial AT Communication. In my trials and tribulations building my quadcopter remote (soon I'll post about it) I've run across problems getting two way, full speed, and reliable communication between my modules. Here's what I discovered after a lot of manual reading:

Building any radio controlled vehicle is usually a money intensive endeavor. When you're building one that flies, is computer controlled (and will hopefully soon be autonomous) it goes to reason that it will be extremely expensive. Some quadcopters are literally tens of thousands of dollars because they use electronics like this. For my quadcopter I wanted to keep the cost as low as possible but still create a reliable platform for future development. I started with the aeroquad project and have done a lot of research on diydrones. Here's the spreadsheet I made before ordering everything (thanks google docs):

I broke a blade last Sunday and have been out of commission while I'm waiting for a new order (plenty this time) from hobbyking in Hong Kong. Meanwhile, I've taken the opportunity to redesign and strengthen the frame. Here's where I am: