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LASER - A140 Lense - 405-G-2 Glass Lens for Aixiz Laser https://www.youtube.com/watch?v=sx8QeGItaiY video (https://www.youtube.com/watch?v=sx8QeGItaiY) Laser driver http://laserpointerforums.com/f67/0-2a-pulsable-pwm-linear-laser-diode-driver-98061.html#post1434357 url is here...

Hi Benm; I used a TIP122 darlington, Current gain minimum 1000 ;)

I had to lower the rise times because of my lead length, stray inductances were causing overshoots which might be harmful to the laser diode. But that's because I have long wires, if the driver is close to the laser itself speed will go way up. See the initial pictures with R2 = 1k. This is not...

UPDATES http://imgur.com/a/A470t The rare turn on/turn off would only happen if my firmware had a bug in it, it's not typical operation, but it's nice to see there is no overshoot. I have used a resistor divider to set my max current to 1.6A, as this is as hard as I want to drive my LD...

I'm using a 10W power resistor as the sense, so I guess that gives me about 3Amps give or take MAX current. Anyway, I made some mods the circuit as it burned my LD (sad face) I removed the NMOS transistor and replaced it with a NPN Darlington (TIP122) I looked at the relay bounce and it turns...

Hi Ben! The relay is used to short the laser when the CNC is not being used. Basically a safety feature . When the CNC is used, the LASE pin is used to modulate the laser. Shorting the terminals helps protect the device against ESD, as I understand it. I read it in a thors lab manual about...

Hi guys, below is a design I made for a 12V laser driver for a CNC http://imgur.com/a/rDFcP - schematic http://imgur.com/a/FY5nk - reality ref_pwm is a PWM signal (or if you want... a DC one, you can skip the filter if so) of a few KHz, it's duty cycle sets the reference voltage anywhere in...

Hi, I am building a laser engraver and due to my mechanical ineptitude my base is somewhat wobbly, to get around this I need to use a very small working distance of ~ 1cm. I'm hoping to use a 445nm 2 watt laser (DTR's 2W M140 445nm). However, I am a bit stumped on the optics. I was hoping to...