Personal blog, accepting guest commentary and links to things of interest.

October 16, 2007

Lesson: Don’t fly planes over secure National Labs!

by @ 3:13 pm. Filed under heli

Unfortunately I was the pilot for one run where the sun was in exactly the wrong position and I got momentarily blinded. When I found the EasyStar again I couldn’t tell what it’s orientation was. Needless to say, ten seconds later it was in the top of the highest tree inside the gate of a super-secure National Laboratory. Yikes.

I dropped the kids off at home and went to the main gate of the lab and explained what happened. To my astonishment, they neither laughed at me nor arrested me. Instead, the head of security escorted me to the cyclotron and we started looking around. I went and got the transmitter and gunned the motor, and eventually we were able to find the plane by following the sound. Sure enough, it was 60 ft off the ground in the tree and really wedged in.

DIY Drones

September 5, 2007

My GY401 setup tips - RC Groups

by @ 10:52 pm. Filed under heli

My GY401 setup tips - RC Groups

Blade CX2 body to boom mod

by @ 2:22 am. Filed under Misc, heli

Here’s a stock tail fuselage. Problems are: easily broken, acts like a sail in the wind, ugly :(.

Nifty refit kit from BoomTown Hobbies, $26 on ebay + free skids that don’t break everytime you look at them.
After picture.

Maybe I’ll take it into work for a test flight at the end of the week. Expecting good things.

August 25, 2007

DIY Drones

by @ 7:01 pm. Filed under heli

DIY Drones

This is a resource for all things about amateur Unmanned Aerial Vehicles (UAVs): How-to’s, links, videos, images and a discussion group.

Among other things, this is where we’ll be listing all the parts, software and instructions to build each of our UAVs. Here are some starting links for the first five (and a PDF/poster that shows how the first three compare to military and commercial drones)

August 18, 2007

Stuff

by @ 9:37 pm. Filed under heli

building my UAV
Here’s how I’m building my UAV… well, at least, how I’m starting to… Basically, I bought a Blade CX2 heli, complete, for about $200 and hacked the heli, added sensors, microcontrollers, etc.

The CX2 controller has 4 potentiometers into which I spliced a breadboard. A Parallax Propeller (prop chip) is used to read the control stick voltages through a simple Delta - Sigma ADC… receive live data from another prop-based system resident on the heli, some control laws are (will be) applied, and the new voltages are output using a PWM based DAC (couplea caps, couplea resistors…). The prop also can talk to a laptop thru its USB port. I have some java code which displays various outputs (very much a work in progress and not currently a high priority)

July 15, 2007

Nice flying

by @ 11:37 pm. Filed under heli

I have a CX2 also, and I really would not dare to do this.

May 22, 2007

Some flickr updates

by @ 4:08 pm. Filed under heli

I have some more photos of the helicopter.

Also, I just met this skink who appears to have moved in under the front steps. I’ve decided to name him lefty, since he’s missing his right front mobility function.

April 27, 2007

I has a new heli.

by @ 9:59 am. Filed under heli

Right now, it looks like this.

When I’m done, hopefully it will look like this.

internal links:

Aquarium

    PH = 8.16
    AirTemp = 76.54
    TankTemp = 78.5
    ORP = 423

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