Fire the Laser!

13 02 2009

Today we will fire the danger laser! I have the plumbing for the water cooling working. For this we take a field trip to my friend Stuart’s shop. He has 240V mains and a variable power supply. Here are the lasers:

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The labels are a bit ambiguous for the electrical connection. Is the chassis the anode, and both leads on the top the cathode? I think this must be the case. Poking around with an electrical multimeter, I find there is almost no resistance between the two terminals on top. But when you test between the either of the terminals and the chassis you get a different resistance depending on the direction of the test, which is from the diode’s electrical bias.

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We will be testing these current limiting power supplies (originally from NASA)

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Here is the full setup.

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Bucket of distilled water for the heat exchanger (we must have run this at too high a voltage, you can see it melted a little):img_3234

And the verdict? Success! Here is a video of the setup, and a video of the trial run.img_3236

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