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  1. Shadetree Engineer

    Idea for DIY 1-ohm resistor

    Well, I suppose I ought to attempt some explanation of what's going on here. I was goofing around and playing with some magnets and otherwise just killing time when I decided to cut a small piece out of an aluminized mylar 'emergency blanket' to see how much it would take to get one ohm. Turns...
  2. Shadetree Engineer

    Shine a laser through a hollow tube kind of question

    I think this is a science topic, I was fooling around with a cheap red laser and tried aiming it through a small piece of tubing. I noticed that no matter how well I held the two, the dot on striking a nearby surface would appear dimmer when going through the tube, as compared to without the...
  3. Shadetree Engineer

    This VideoDisk Player does not have a laser!

    Ok, I'm only posting all this just in case somebody like me is looking at getting a VideoDisk Player just like this one for a laser tube. I got this from a second hand store, there's no return or exchange... When it says 'Capacitance Electronic Disc System', that is not another tricky term for...
  4. Shadetree Engineer

    HeNe Video Disk PSU ?'s

    Hi, I'm still new here. I'm going to try limiting the questions on this to just this side project. I'm still waiting on a lens assembly shipping from Hong Kong, so the laser diode project is on hold:( I have a HeNe tube(NEC GLT 165) complete with it's original PSU & power transformer, all of...
  5. Shadetree Engineer

    Just a country boy in the South Puget Sound

    Hi, I am just beginning to do lasers the right way having up to now just doing the 'Kip Kay' route with various DVD diodes I retrieved. I kept seeing this site in my research, so here I am! I might not be on too often as I get new projects all the time and finishing any is the real challenge...




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