Hello,
Can anybody help me how to control a laser with the below spec in terms of intensity and on/off using Arduino Uno?
Previously, I used a current regulator to control LEDs. In my opinion, there should not be any difference. But before starting the project, I would like to know experts' opinions.
Thanks
I moved your topic to an appropriate forum category @MasoudHasany.
In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.
This is an important part of responsible forum usage, as explained in the "How to get the best out of this forum" guide. The guide contains a lot of other useful information. Please read it.
Thanks in advance for your cooperation.
Generally leds and lasers are driven the same way. Leds are just more forgiving, tiny overcurrent pulse wouldn't probably burn a led but same might burn your laser immediately.
Laser drivers also often have other features like temperature sensing and biasing (to keep laser always slightly on).
Thank Kmin. Could you please send me some laser drivers that you have used before? Is the one I sent in my first post not good enough for lasers?
Thanks
I have been using drivers for high power lasers, quite expensive ones.
Your current regulator might work well, but you need to be very careful when you adjust it. You know, you can't adjust output current without laser attached.
What's your approach with laser?
Yes. I will start from the zero current and increase it while measuring with an amp meter. I want to use it for hyperthermia.
Hyperthermia is a cancer treatment method that involves raising the temperature of tumor tissues to damage and kill cancer cells. Near-Infrared (NIR) lasers are often used in this process due to their unique properties.
On skin or something more scary? 
I meant, how you need to apply laser, continuous, pulsed..?
It will be applied on some nanoparticles with these features and then we will measure some characteristics. It will be intermittently, like 5 min on/ 5 min off.
Ahh, ok. I once did a circuit to produce silver nanoparticles. Since I had multiple components ordered for it, I decided to sell rest of them in Ebay. One guy bought it and then after asked questions about to treat his daughters serious liver problem, with that nanosilver aka colloidal silver. That guy was a doctor, but it made me feel uncomfortable...
Anyway, back to the laser, you don't need any sophisticated driver for x min on/off.
Oh. man. That is very strange!
By the way, I am a researcher in a university and we do these to shape the future of medicine and treatments. We don't test these on humans yet.
All in all, based on what you mentioned, I think the driver that I used for LED will be good enough for this applications as well. Am I right?
Thanks
If it's just for on/off I think it's better than some "aliexpress" laser driver. For fast pulsed operations, you might want different driver.
Hi again,
I use the same setup that turn on the LED but it does not turn on the laser diode. The current is in the range based on the diode specification. Any clue?
How did you set the current? Hopefully not just ramping up until "something happens"...
Either damaged diode, or that driver is not able to supply slightly under 2V voltage.
Do you have some other current regulated power supply to test?
