fricek12

Sorry, I was using Smartphone didnt read thread dates...

I just wanted to know, why there are theese 2 resistors in this circuit, thought they could be compensated with used variable resistor, but now I know.


Going to buy this laser diode
http://www.gme.cz/_dokumentace/dokumenty/511/511-268/dsh.511-268.1.pdf

and try build driver...

Could I ask You, if this circuit should be OK ? (I ll just set correct value in variable resistor with multimeter to Operating Current 18 mA and Operating Voltage 2.1 (as sin datasheet)

Circuit:
http://laserpointerforums.com/attachments/f42/11711-diy-homemade-laser-diode-driver-lm317_components01_001.jpg



This one is not for me ?
http://laserpointerforums.com/attachments/f42/31562d1298103794-diy-homemade-laser-diode-driver-31410d1297294173-logical-way-setup-2x-lm317-driver-lm317.jpg

First Off , your posting in a thread about 4 years old, which is there just for a reference, You want answers to your questions? Search button is your best friend!!
Anything you want to ask about lm317 and how stuff works, u can ask me ..