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Hello, today I had bad luck again with a 500 mA buck/boost driver. It was not from DTR! I connected the new driver to my dummy load of 6 diodes and a 0,1 Ohm resistor. Nothing happens, no curent draw from my laboratory power device. After checking the wiring, the same result. Is it possible to...

Hello, since I started to join this forum, I built some custom made and/or modded flashlight laseerpointers with different colours and laser power. 1. 405 nm 500 mW 2. 450 nm 1,2W; 1,7 W: 7W+ 3. 465 nm; 1,8 W 4. 488 nm; 150 mW 5. 505 nm; 150 mW 6. 520 nm; 800 mW 7. 635 nm; 200 mW and 700 mW...

Hello, today I got two sharp laser diodes Sharp GH0631IA2G 185mW 638nm Laser Diode from DTR. I pressed one into a 12 mm Copper heatsink from DTR and connected it to a brand new 500 mW driver from X-wossee. Nothing happened! No current, no laser light. After that, I connected the diode...

Hello, I made complete DIY Hosts for my first power lasers. Then i started to use flashlicht hosts. I think the ultrafire 501B hosts are nice. For medium power laser the convoy S2 is fine. Now I am looking for other possible hosts with 18650 batteries. I am also looking for better quality...

Hello, because I hate to cut connections to measure the current to a laser diode, I bought a cheap clamp multimeter. Attached you will see a picture with a comparison between the clamp meter and the power supply. If you set the multimeter to zero before, the results are nice, even at low...

Hello, as I learned, most of the 465 nm power diodes have a ball lense. Some make a tight spot, some not. Decapping the diodes will decrease the lifetime of the diodes. Is it possible to use a second lense in front of the ball lense to improve divergence? I can make the special heat sink by...

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...

Hello, I ordered 505 nm diodes from Techhood. Does anyone of you have experience with this wavelength? I also ordered a new sharp 490 nm Diode, because I killed mine with the wrong Driver. A little turn of the potentiometer of the big Driver gives the Diode approx. 1000 mA for the split of a...

Hallo, some month ago, I bought this nice blue laser module: https://www.ebay.de/itm/Focusable-465-470nm-3500mW-Blue-Laser-Module-Analogue-Modulation-For-Laser-Light/262580156386?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Now I would like to build a laserpointer from this...

Hello, looking for DIY laser parts, I see, that there are a lot of differént lenses for different wavelengths. Do I need a special lense for every different wavelength? What will happen, if I use a "red lense" for a 450 nm Diode? Is there only a bad focus, or will it destroy the Diode by...

Hello, I finished my first copper heatsink for a 5,6 mm laser Diode. I drilled a 5,5 mm hole, followed by a light cut in my lathe. With the digital caliper, i measured a Diameter of aprox. 5,60 mm. I had luck, that i got a pressfit of my Diode in this heatsink. My question is, how much is the...

Hello, I am quite new with the laser and laserpointer Hobby. Until now, I have only a few low cost laserpointers from China,a nice 860 mw green Laser 8520 nm) and a 488 nm Laser with 3,5 W Output. At the Moment, i plan to build a 7W blue laser (450 nm) for engraving and a 2 W 450 nm...