Talking Fish

I finally finished a project that has been nagging me for the past few weeks! Yah :) We have these robotic fish swimming around and they can’t talk to each other, well, until now. I designed a transceiver communication board using RF modules from Linx Technologies hoping that time would be saved. Designing a stable radio frequency (RF) circuit is fairly straightforward when you’ve got fully integrated embedded modules, but once that design is placed in a conductive medium (like water) it gets a whole lot more complicated. As if RF design wasn’t black magic already, antenna placement, receiver sensitivity and ground plane geometry become critical and will make or break a design. At least the first board revision is done and I can send it off for fabrication and component soldering (2-3 week turnaround time). Now I can get married without this thing hanging over my head. ::breathing a big sigh of relief::

Of course this means I get to look forward to hardware hacking and bug fixing once I return from the honeymoon.

Solidworks

LCD solid modelAs an EE I don’t get much exposure to ME CAD software. Most of my time at Cal Poly was spent learning board design and layout/trace routing tools like OrCad. Recently I’ve been tinkering with SolidWorks and I’m totally impressed! SolidWorks, like its name implies, is a solid modeling CAD package. Check out this LCD display that I just modeled.

PolySat Bites the Dust

While studying at Cal Poly, I was a member of the PolySat picosatellite team. We worked on designing and building a small 10cm^3 satellite which would perform remote sensing in space and relay information back to earth via HAM radio bands. While I was only briefly associated with the project, I did the early design work for the command and data handling subsystem which would eventually tie the microcontrollers with the payload sensors and communication subsystem.

Cal Poly’s two picosatellites, along with 9 others from universities around the world were launched toward space today by a Russian Dnepr rocket in Kazakhstan. These cold-war era ICBMs were retooled to serve as launch vehicles, providing a low-cost alternative for launching payloads into orbit. I suppose the old saying, “You get what you pay for”, rings true once again. Our satellites never reached orbit since the rocket’s engine failed shortly after launch. All that work for nothing….. Chinese-built Russian garbage for the lose.

Actually this makes me wonder how great the Russian threat was during the cold war. I suppose it doesn’t matter since the likely scenario that all the Russian ICBMs failed to launch would have been irrelevant since nuclear winter would have quickly ensued following a U.S. Titan II salvo. 9-megaton warheads can really kick up some dirt.

PolySat Latest News Page: http://polysat.calpoly.edu/latestNews.php