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  1. R

    505 nm laser diode

    Hello, I use a little arbour press for this job. The press stamp has a 10 mm hole at the bottom. I turned a 10mm brass rod, with a bore sufficient to take the diode pins without damage. That works fine for me. As I told, I did not kill the diode by pressing, I cut the wrong pin off! Today, the...
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    First laser build (red) inst working

    Hello, I killed two pen laser pointers, because the Driver had a reverse polarity compared to the blue laser pointer. But nobody mentioned it when i bought the laser pen. Maybe your Diode is nearly dead and runs in the low LED mode. best regrads Edgar
  3. R

    505 nm laser diode

    Hello Paul, I think you are right and I have to learn much more about laser diodes. The first diode runs even after the wrong wiring, but only for seconds. The second Diode runs at my laboratory power source at 50 mA. Then I pressed it into the heat sink and it was dead. I think, it was a...
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    505 nm laser diode

    Hello, today I got my two 505 nm diodes. Both did not work until I realized, that they where case positiv. So I connected minus with plus and plus with minus. After that, I could see some bluish green. After this test, I pressed the diodes into a DTR module. What should I say, they are gone...
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    Ebay seller newgazer and techhood - same seller, different accounts.

    Hello, I have also only good experince with techhood. Once I bought a defect 9 mm lense, I had no rouble to get a free replacement. best regards Edgar
  6. R

    Is there a laser Diode comparison list?

    Hello, in some forums you will find a register, called data files and downloads. Normaly ,comments to this files are not allowed. This keeps this data clean and compact. Is there a data file for the diode list? If not, I will copy it with the snipping tool. I think, in future I will...
  7. R

    Is there a laser Diode comparison list?

    Hello, thanks, that is a very useful list. Where did you find it? best regards Edgar
  8. R

    Is there a laser Diode comparison list?

    Hello, I searched this forum for a laser Diode comparison list, but could not find one. There are some compact information at the DTR shop, also a lot of information hidden in numerous threads. I would like to see a compact comparison list with information like : mono/(multimode; wavelength...
  9. R

    Best Burning laser

    Hello, yes, I share your opinion, that brass is not the best choice for a heatsink. I use copper 99,99% for this purpose. I also have some rods of nickel copper that would look fine. Maybe I use this material for a little low power laserpointer host. best regards Edgar
  10. R

    Best Burning laser

    Hello, brass is not the worst choice for thermal conduction. It has similar conduction to Aluminium alloys. The best choice for the money is pure copper or pure Aluminium. But did you ever machined pure Aluminium? It is a pain, also pure copper ist not nice to machine. Oh I forgot silver, but...
  11. R

    505 nm laser diode

    High Rich, whenever I need a tap and can buy it for a reasonable price, I will buy it. I only make special tools, if I am not able to order ist. Not enough time to do all the things I want. best regards Edgar
  12. R

    505 nm laser diode

    Hello, after I noticed, that my first selfmade tap has 11,56*0,5 mm, I made another one. With the support of the german forum "Zerspanungsbude" the second attempt looks better and cuts much better . With this lesson learned, I think special sized taps will be no problem in future. best...
  13. R

    505 nm laser diode

    Hello, just visits the Sanwu homepage. They say, that the thread of the beam expander is M 11,4*0,5. Please excuse my ignorance.:cautious: best regards Edgar
  14. R

    505 nm laser diode

    Hello, today I made a 11,5*0,5mm tap from tool steel. I had a test run in brass. The tap works in that material, although the grinding of the free angle of the cutter was handmade an a little bit poor. The fit of the beam expander is not a snug fit, it is a little bit loose, but it works. So...
  15. R

    505 nm laser diode

    Hello Rich, the diameter of the beam expander thread is 11,44 mm. Normaly the outer diameter of a bolt is undersized. So my guess was 11,5*0,5 mm. best regards Edgar
  16. R

    505 nm laser diode

    Hello, I finished my adapter for the beam expander. Without the M11,5*0,5 mm cutter, it was more work than I expected. When I havew to do this again, I would turn the thread down to 11,0 mm and glue it into the M9*0,5 mm adapter. With the beam expander, my 638 nm Laser looks nice, but the beam...
  17. R

    505 nm laser diode

    Hello, thank you very much for your support. I will built an Adapter M11,5 to 9 mm from brass or stainless steel. My lathe is prepared since days to cut the 0,5 mm thread. Meanwhile, I noticed, that the sanwu thread is not strange. It is a m11,5*0,5 mm from the Iso 13-3 series. At ebay they...
  18. R

    505 nm laser diode

    Hello, today I got my 3* beamexpander with that strange M11,44*0,5 thread. Is this beam Expander used together with a lense or without? At the moment, i have no real idea, how to connect this expander with my homemade lasers. The problem is, that the thread is very short. It will be very...
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    505 nm laser diode

    Hello, I also tested an 0 to 300 mA Driver from Odic Force. It works well at 5 V test load, but it will not regulate at 5,5 V. I will see, how this Driver works with the new diodes (on the way from China) best regards Edgar
  20. R

    505 nm laser diode

    Hello, i think my 4500 mA driver is also dead. At a 5 V test load, the current swings between 400 mA and over 1000 mA. Today I got some driver from Odic Force. The 0 to 1600 mA driver has an output between 330 mA and 600 mA! So it is useless for the 488 nm diode. What driver will work with this...




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