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hi, thanks for taking fotos. hmmm ... .so ... i think my diode is not a BDR 209 or a 206 any ideas ?

haha .. the funny chinese sellers: 10W Laser pointer ... :crackup: Function: Burn Matches/cigarettes The parts are not worth $38 - cheapest driver - used laser diode (with luck 500mW)

hmmmm ... can anyone take a photo from the BDR Diodes back side ?

hmmm ... the price was $16 .. i doubt, this is a BDR-206 ( i cant belive) ... the chinese sellers are not stupid ;-) to theme soldering: no pin is to short ... THIS Diode pin is large enough :na: :

oh .. sorry, forgotten.. 405nm the pin is okay ;-) I can solder SMD in the size of bacteria :D

Hi, i have bought this 500mW-LD (haha) from ebay half year ago. ebay has closed this offer (dont ask me why :can:) at 200mA i get ~180mW with a G-2 lens. It is a 3,8mm LD. It this Diode known ? How much REAL power can i expect ? Greetings

THANKS Greetings

thanks for answer, can u tell me, where can i buy a TEC for this ? ebay link ? Seller in europe ? Thanks

Hi, i look for a sensor to build a own LPM. With a Ophir 20C UAU i can calibrate a own LPM. what sensor can i use ? it is for ~2mW - 2000mW (not more) greetings

ok .. thanks last question: the AixiZ driver .. is this the same like this 635nm 650nm 808nm 980nm TTL Laser Diode Driver Board Drive 5V Supply 50 300mA | eBay ?

@DTR: the AixiZ or my china driver ?

thanks for answers ... i need this driver with 0,5A LD current ... but adjusted 1.2A will show a peek 1.9A ... that's garbage ... ok

Hi, i have bought this driver (3A TTL Laser Driver Board Step Down Driver Module 405nm 445nm 450nm | eBay) I tried to adjust the values, but with a testload (4*1N4001 + 1Ohm 5W ~> M140 LD) i got this. look the attachements the measured current has a peak over the adjusted value. at lpf3.jpg...

it does not work :-( .... the output current is 0,2A (with testload or Laser liode) i will power a IR-Diode (2.2V, 700mA). How is the circuit to work with 5V input ? what dirver can i use ? thx

hmmm ... http://laserpointerforums.com/attachments/f42/11711-diy-homemade-laser-diode-driver-lm317_components01_001.jpg by changing the resistor values to 2x6.8Ohm ..i will get max 0.2A output (with ~8V input) ... at 5V input the output current is 0.06A

hi, what is the best use with a nichia M140 diode - pulsed or constant ? if pulsed, which frequency is recommended ? Signal type ? (Rectangular or Sinus pulse) in the datasheet i can not find a pulse width value. the same question for a NDV4542 this is a 100mW 405nm laserdiode CW = max...

hi, thanks for answering with the lm317 driver, i cant use 5V for Input ... i only have 5V (max. 3A) and i would not use a step up converter - brrrrrrr :yh: space/heat is no issue (for the driver i have ~ 30x40mm) - a clean output and protecting the laserdiode is most importantly Greetings

hi, can i use this driver (https://www.amazon.de/580-600mA-konstante-Strom-reguliert-Treiber/dp/B00BXAM7LQ/ref=pd_rhf_cr_s_cp_3?ie=UTF8&psc=1&refRID=TH59KDA8YB8H9VHCRB4H) i want to use this to power IR-Diodes (max 700mA) ... thx

hi, THANKS for answering ... no .. it is not a handheld laser, but the monolithic crystal is the only crystal i have found. ;) The laser diode is mounted on a tec (peltier) and i play with the settings (current, focus, angle and distance) to get the best values. I need a reference point to...

hi, i want to build a green DPSS laser. i used a 808nm 500mW LD and a "Nd:YVO4+KTP Laser Pumping Crystal". what is the right way to install the crystal ? What should i consider to get the best efficience ? What is the best crystal working temperature (must i cooling the crystal) ? Greetings