hey guys thanks for the information i have a question again... probably noob question but would i have to use the DDL driver circuit for a ir 300mW ? and do you think that this is a sutibal case for the diode providing i get a heat sync ?
$3.95 - Red Laser Module - Focusable Dot (3.5V~4.5V 16mm 5mW) - Red Lasers
I'm not too familiar with IR diodes, but you can use the DDL circuit for possibly any diode.
You just need calculate voltage needed:
Voltage drop of IR diode + 3V for LM317 + additional 1.2V for overhead
Calculate resistor for 300mA:
Reference voltage for LM317/ Current desired in Amps
1.25V/.300 = 4.167 Ohm resistor or a 4 Ohm resistor would be ok (312mA)
Regarding the module I'm not really sure what size IR diodes are, but and Aixiz module fits most laser diodes (TO-18 5.6mm).
Just a warning IR diode beams are not visible to the human eye and can be very dangerous. Wear proper goggles.
Pulsed lasers are exactly what it says they are. They emit light in the form of pulses and continuous lasers emit light continuously. :thinking:
More info here:
Sam's Laser FAQ - Preface, Introduction, What is a Laser?, Safety
It seems like you have everything you need to build your driver. However, you would need a test load to measure how much current your outputting before you connect it to your laser diode.