Archive Page 2

18
Sep
09

News Chopper 4


Well not quite, but with the small size of HD recording devices, you can mount them almost anywhere!

Here, I’ve strapped a Flip Mino HD recorder to a small helicopter for some aerial photography.

To protect my precious HD camera from my mediocre Heli pilot skillz and additional risk of crashing due to the added weight on this small bird, I wrapped it in bubble wrap, but it in a bag, and secured it to a small carbon fiber rod I attached to the side for this purpose.

The video is a bit shaky, but not too bad! Professional rigs use much more capable helicopters and vibration isolated camera mounts.

heli_HD_Mount

12
Sep
09

New Spin (or lack of) on hard drive technology


(Copyright 2009 – Kevin Rouviere)

This is an idea I’ve had for awhile, and while I don’t have a working system based on this idea, I can illustrate the principles.

Potential benefits:

– Maintain high recording density

– Dramatically reduce power consumption

– Instant start/stop of data storage device

The storage device can be built using conventional hard drive technology, with minimal changes to the mechanics. The spindle motor is replaced with a servo motor to provide precise angular positioning of the platters. The head actuator is then used to sweep the head back and forth across the platters, to create relative motion between the read/write head and the recording medium. The read/write head would be rotated to provide proper alignment of the head with the recording tracks. The recording tracks would not be circular as in a conventional hard drive, but would rather be stripes extending from the innermost portion of the platter near the hub, toward the outer edge of the platter.

Using this technique, the economical method of storing data on hard drive platters could be combined with very low power consumption when the drive is not in use, because the platters would not need spin, other than to provide the correct angular position of the platters under the read/write head. When data storage or retrieval is needed, rapid startup may be achieved due to the short time needed to engage the read/write head actuator.

hdrive

Elements of the experiment – An old hard drive, Stepper motor (to drive spindle), wires soldered to voice coil.

CIMG2303

Short clip showing approximation of how device would work. Platter can remain motionless while voice coil provides required head velocity to read/write the platter.

 

05
Jul
09

Death of a laptop


A little 4th of July fun!

27
Jun
09

Simple Holography Setup


http://www.flickr.com/photos/fotoman/3316272563/in/set-72157614487307439/

Click the above link to see notes about all the elements of this simple but effective setup for making small holograms. The workspace is small but you can still get nice results.

17
Jun
09

Holo Projection


One of the cool things you can do with a transmission hologram is to shine a laser through it “backwards” to project the image onto a plane. Each spot on a transmission hologram contains an image of the original subject from a unique angle. In the above photo, the laser pointer is shining on a small spot on the hologram plate on the left, and the image is projected onto a wall on the right side. It’s really cool to see!

17
Jun
09

Making of a Hologram


Here we have all the elements to make a transmission hologram.

Miniature sand table, HeNe Laser, Mirrors, Lenses, Plate holder, and last but not least our model!

This one turned out pretty nice especially considering the non-ideal setup. People who use sand tables usually build a fairly good size one for added stability. This was a pretty low budget setup since I already had laser, optics, etc left over from the sand table I used to have years ago.

16
Jun
09

HDR Photo


HDR Photo with some photoshop warping.

HDR Photo with some photoshop warping.