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Recently I’ve gotten back into my routing craze… since I can’t get IPv4 space anywhere, I got two 6over4 tunnels and a /48 from Hurricane Electric. My Cisco 7500 is linked up and serves up tunnels to all of my boxes, splitting up the (enormous) address space and doing intelligent routing with BGP in places […]

Today I did a lot of math regarding the lift of a non-airfoil wing. From the math and review of the videos, my best bet is that we aren’t properly maintaining the right angle of attack during takeoff. The leading edges aren’t near strong enough either, but that’s something I can’t fix (if anyone knows […]

I got my pretty new radio a few days ago. My Motorola XTS 2500 is quite nice, I have to say. It’s the second to most epic handheld Motorola makes. In addition to the things my HT1250 does like MDC signalling and whatnot, the XTS series supports APCO Project 25. This standard, P25 for short, […]

In an effort to promote radio and space to other WPI students and staff, Theo, KC2RMJ and I (KB1OZL) put together an event with WPI Wireless to talk to the International Space Station during a particularly good pass last November. I found the pictures of the event and thought they were nice.

I put together one […]

Being an ECE student has it’s perks… The head of the department, Prof. Looft, sponsors a newbie gliding event every year with the gliding club he belongs to. There were about 25 random WPI kids out there, and we all flew. Very epic!

This August I moved into a school-owned apartment while I work for the Manufacturing Eng department designing and building prototypes for outside companies. It’s handy because I’ll be living there next year so I won’t move twice. I appear to have accrued a large amount of computing and routing equipment over the last year… Take […]

Over the past few days I’ve been working on a z80 computer. It’s on breadboards, and includes 2M flash, 32k static ram, and 3 IO ports. It’s quite interesting, and is clearing up lots of my low-level computing knowledge. More on that in a few days.
Today I put much larger motors on the X and […]

Tonight I finally got around to putting on a new Z-axis motor. It’s about 5x the torque of the previous, plus 4 times as many steps per revolution (so 4 times as accurate). Since there is more torque, the rapid in the Z-axis is now 11 ipm, up from about 1.5 ipm with the previous […]

I’ve been using the mill succesfully for a few weeks now making several PCBs. It’s really been great being able to design a board and have it in my hand within an hour. Unfortunatly, the Z-axis motor appears to have bit the dust. I came back from the other side of the shop to some […]

I’ve been working on my CNC mill over the past month. It’s based on a small manual mill made by Proxxon. I have 3 nice unipolar stepper motors, one on each axis. The motors are controlled by 3 L297s from ST Micro (these are REALLY amazing by the way…) to 12 TIP102 transistors used as […]

If you’ve ever been to a supermarket in a city, you’ll have likely seen a lock on one of the front wheels of the carts to prevent people from stealing them. A friend and I managed to make a transmitter so that we could the carts would lock when I walked by with the transmitter […]

I’ve collected 65 flash capacitors from disposable cameras over the past months and put them together. Last night we used them to make big sparks and such… see it here.

In browsing around, I found JTrack3D on the NASA, a basic 3D satellite tracker. It works well enough, though it only lets you use predefined vectors. I’ve edited it so that you can use your own. Take a look at JackTrack3D.

Finally got the whole page for the goKart and the logic probe.

I got the Logic Probe built, and it even looks almost cool… as soon as I get a little time I’ll poke around some chips and see what happens. Until then you can check out the page with a basic description of it.