- Joined
- Sep 18, 2015
- Messages
- 10
- Points
- 0
I'm building my first laser project with the end goal being a laser engraver capable of cutting vinyl.
The diode I chose was a 300mw 808nm: 808nm 300mW 5 6mm TO18 High Power Burning Infrared IR Red Laser Diode Lab 2 2V | eBay
I made a driver with an lm317T and bought this casing: 808nm Laser Module Host for TO18 5 6mm Laser Diode with 3 Elements Glass Lens | eBay
Powering up the diode it looked more like a fuzzy flat line rather than a dot. For pushing 400mA, the upper range on the data sheet, I found I needed a 3 Ohm resistor for the feedback path. After turning it on and measuring the current it was at 800mA. I'm assuming that the diode is damaged although it operates as originally it doesn't burn anything.
Is there an error in my method? Will the case focus properly?
I would like to stay with this wavelength as I already spent a good bit of money on safety glasses; more than on everything else. Should I just go with a premade module like this: Professional Laser Diode Driver for 808nm 532nm 660nm with TTL | eBay
Any recommendations on my next diode if this one is junk? Or up to 500mW 1pc to 18 5 6mm 500mW 808nm 810nm Infrared IR Laser Lazer Diode LD No PD | eBay
The diode I chose was a 300mw 808nm: 808nm 300mW 5 6mm TO18 High Power Burning Infrared IR Red Laser Diode Lab 2 2V | eBay
I made a driver with an lm317T and bought this casing: 808nm Laser Module Host for TO18 5 6mm Laser Diode with 3 Elements Glass Lens | eBay
Powering up the diode it looked more like a fuzzy flat line rather than a dot. For pushing 400mA, the upper range on the data sheet, I found I needed a 3 Ohm resistor for the feedback path. After turning it on and measuring the current it was at 800mA. I'm assuming that the diode is damaged although it operates as originally it doesn't burn anything.
Is there an error in my method? Will the case focus properly?
I would like to stay with this wavelength as I already spent a good bit of money on safety glasses; more than on everything else. Should I just go with a premade module like this: Professional Laser Diode Driver for 808nm 532nm 660nm with TTL | eBay
Any recommendations on my next diode if this one is junk? Or up to 500mW 1pc to 18 5 6mm 500mW 808nm 810nm Infrared IR Laser Lazer Diode LD No PD | eBay
Last edited: