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    Tornado Laser Power Meter From The Laser Pointer Store

    This must be something new that just popped up on their web pages: Tornado Laser Power Meter $55 LPS is working hard to let our laser fans to have an accurated, reliable, and affordable laser power meter. The Pocket laser power meter is popular but we still have space to improve. Tornado is...
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    Maybe Third Time Is A Charm

    So I'm building a power supply for my red laser project and because this is the design that some of my students will build, I have to have everything just right. My first build was OK, but the PCB was a bit too small. The photo below shows the build without the heatsink on the LM317. EDIT...
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    Photo: Testing My 450nm Laser

    This is really just a test to see if I can upload photos before I try and put them into other messages. The photo looks like it's very bright outside, but it was really very dark.
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    Low Cost Heat Sink Tests

    My students are always impressed with my laser demos in class and some students want to build their own. After considering all sorts of options, I decided that the Mitsubishi 500mW 638 Diode (ML501P73-02) from DTR's Laser Shop was an ideal choice. This offered enough power to have fun, but...
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    My Laser In The Classroom

    I haven't posted for a long while, but I've still been playing with lasers. I teach Electronics classes at the local Jr. College. For the last few years it's been frustrating because I couldn't show my lasers to anyone because I didn't have enough safety glasses. Well, that all changed when...
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    Killing a Fly with a laser

    So we've had hot weather in Southern California lately and my wife likes to leave the front door open so that the afternoon sea breezes cool down the house. That works, but flies come in too. Yesterday I considered blinding them with my 25mW green laser. Interesting that the flies don't react...
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    Can your laser melt a hole through a candle?

    Can your laser melt a hole through a candle? Just for fun can any of your lasers do this? Assume the candle is vertical and the laser's hole is horizontal through the candle. The beam may have to be slightly off to one side to avoid hitting the wick. If yes, what is the minimum amount of...
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    How I Built My First Laser

    How I Built My First Laser Building you own laser is a rewarding experience. Not only is there a coolness to seeing what you built, but there's the ability to chose and set your own design parameters to your own build. If you have built other electronics projects, you'll find that building...
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    Getting Ready For My First Build

    On a personal note, I'm excited because I ordered all the parts for my first build. In this case it's going to be a dual power 55mW/107mW (give or take) Green Laser. As I said in the past, I've been slowly working up my way up the power curve from <5mW to 25mW to 80mW. I considered jumping...
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    Laser Pointer For Green Line On Floor

    A family member needs to project a straight line across a floor and wants the line to be there for hours at a time. This gets into an area I've never worked with and wanted to see what others knew. If this was a single spot, I know that 5mW would be the maximum, BUT because the energy is...
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    Meet robocrow: Machines shooting long-range laser beams to scare birds away replace s

    Meet robocrow: Machines shooting long-range laser beams to scare birds away replace scarecrows: Read more: Meet robocrow: Machines shooting long-range laser beams to scare birds away replace scarecrows | Daily Mail Online So a green laser with random or sudo-random movement is used to scare...
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    U.S. Navy Deploys Its First Laser Weapon in the Persian Gulf

    U.S. Navy Deploys Its First Laser Weapon in the Persian Gulf U.S. Navy Deploys Its First Laser Weapon in the Persian Gulf - Bloomberg Interesting read and it includes a video too. > 30kW laser (video says 50kW) > up to 10 miles range > Cost per shot $1 > Bad weather shortens range >...
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    Pilot impaired by laser light during LAX approach, FAA says

    I hate it when STUPID people do things like this: A US Airways captain reported being visually impaired by a laser light as he prepared to land at LAX this week, the Federal Aviation Administration said. US Airways flight 674 was approaching LAX via Phoenix just before 12:30 a.m. Wednesday...
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    Dragon Lasers Safety Glasses LSG02

    This posting is for many of the newcomers who really should purchase and be using safety glasses. One does not need to spend a lot of money to protect your eyes from an accidental hit from lasers. The LSG02 is a simple low cost solution ideal for UV, Blue, Green lasers that only costs $19.99...
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    Light Humor, So what's the minimum power to ...

    Light Humor, So what's the minimum power to ... There's an old saying, "A man with one watch knows what time it is, but a man with two watcher is never quite sure!" First of all, I'm not going to ask the question, because I've found out the answer starts out with, "It depends..." I find it...
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    Test Results on Batteries & 5mW Red Laser Module

    I'm still considering my options for a burning laser and decided to do some tests to better understand what to expect if I get the LP 532nm 150mW laser pointer. LP 515nm 532nm 1-150 The first experiment was to take standard AAA Alkaline Batteries with a heavy load. I used two 12 ohm, 2 watt...
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    First Laser >5mW, purchased local

    I'm still thinking about which burning laser to get, but a co-worker happened to purchase a green laser pointer at the local Aahs Store in the Del Amo Mall, Torrance, CALIF. and it turns out to be >5mW. After seeing his, I drove down to pick one up, $19.99 plus tax. I have no idea who makes...
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    AAA Battery Life with > 50+mW lasers ???

    I like the idea of using standard off the shelf batteries for a laser, because I know that 10 or 20 years from now, I'll be able to find replacement batteries. I'm not so sure about the rechargeable batteries that have odd part numbers. The question is for those who have lasers of 50mW or...
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    Power or Power Density (Irradiance)

    I'm trying to research the different options and I think I understand an important point, it's not just the power of the laser, but it's the power density or Irradiance that impacts the burning power. Assume we have two 100mW lasers, both have the exact same power, but laser "A" has a beam...
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    First Post

    Hello to all, I felt a few words about myself should be done before I post anything else . . . I'm a teacher at a local College in Southern California, I teach Electronics, Microprocessors (the PIC), and Basic Robotics. All my lasers that I have right now are all under 5mW, but it is tempting...




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