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Atomic Stephanie

Posted 2011.11.03 21.07 in Life On Drugs

So today was my second adventure in Nuclear medicine. I didn’t get any superpowers when I had my first experience with these guys, so I don’t have my hopes up this time around either.

With or without superpowers, I was feeling fairly relaxed about the whole procedure as I’ve been through it before. The big differences were this time, I (mostly) knew what to expect, and I brought a camera with me to take some pictures. Well, really I only got one decent picture, but it’s a good one…

Syringe, inside a lead-lined steel cannister.

Radioactive

You know they’re serious when the needle is delivered in a lead-lined steel tube. They sat this infront of me on a little cart then left for a while, allowing me ample opportunity to sneak a photo.

Inside the needle is something called Technetium-99m-MDP. The MDP part refers to the medical component, which is that it binds to living bone structure. The Technetium-99m part is the radioactive part. This has a gamma-decay half-life of about 6 hours – meaning that in about 6 hours, half of it has decayed emitting a gamma wave. Or particle. Or wavicle.

Technetium-99m decays into Technetium-99, which then has a half-life of over 200,000 years, emitting beta wavicles as it decays into Ruthenium-99. Something about this feels like it should be at least slightly unhealthy. But then, I’m not a doctor.

Having been suitably irradiated, I was then left to my own devices for the next 150 minutes, to allow the isotope to bind to my bones. The clinic was near enough to home that I could come back here to wait out the delay.

Another difference between my first radiological experience and this one, is that this time, I own a geiger counter! More specifically, I’ve built one into my home MCP project.

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Pointless Dingoo Mods

Posted 2010.04.22 9.44 in Computers/Internet/Technology

Last night I was a bit bored so I sat down and did some pointless hardware mods to my Dingoo.

First, I added a power LED. When the backlight is off, or if you boot it with the B button to go into flashing mode, it’s hard to know if the Dingoo is on or off. And in any event, I’m a sucker for LEDs. “Real electronics should glow in the dark.”

The easy part was attaching the LED, I used a surface mount blue LED that draws 10mA at 3.6v and stuck it near the start button, then wired it between Vcc and ground. I found a point on the rear of the board where the power is switched so I just ran a bit of 28 gauge wire around from the back to the front. The hard part was getting a hole in the black layer of the front case, without also going through the clear part of the front case. I used a cheap soldering iron to melt some of the plastic then some small precision chisels to cut out the plastic and get the hole to be just about right. Actually it was about 80% luck, I’m usually not this good at modifying the plastic parts.

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