Focusable 980nm Infrared IR Adjusted Laser Dot Diode Module 3V-5V with TTL 0-15KHz 12x30mm

Works great. You have to tie red and yellow together for it to work. Seen well on security cameras but my phone camera looks a bit blurry. Must be IR blocked. Looks well enough in my photo I guess.Update: I tried TTL modulation on a TV Be Gone. Works beautifully!

It performs well when operated under 5 V. When the voltage exceeds 5 there is a static electric build up, at which point the laser can shock you. I was disappointed that it comes with no specification sheet at all. That's not a very good practice for electrical components. Other than that, it definitely does work. It is not in the visible spectrum, but when viewed with a smartphone, you can see the emitted NIR (near infra red) light.

Draws 70 mA at 3.6 V and delivers 27mW at 976 nm---not the advertised 1mW, so watch your eye safety. Collimating lens looks cheap but gives a nice 1mm dot at 50 cm (see photo).

Wish I could give zero stars.The 2nd one failed too, so both of these have failed. One a few minutes after receiving it and the original one I bought now.Too bad!UPDATE: Do not buy, not reliable at all.—-Laser dot went dim, the stopped outputting anything.The first one purchased a few months earlier works but has a lot of artifacts in the projected dot. It's oval in shape and has many artifacts in the dot, square shaped artifacts. Also the dot cannot be focused any finer than 2 feet in diameter at 80 yards at its smallest size. Definitely not useful as an IR laser dot.

This is a 980nm laser diode with a rotating lens for focus, at 3.0vdc and a distance of about 5', the smallest "Dot" I could achieve was about 4" in diameter. I was able to achieve similar results with an IR LED and a small lens from an old bb gun scope. Maybe I misunderstood the description. Going to try some TTL control with an Arduino Nano and a Level Converter, but I believe all that will do is modulate power output by pulsing the diode on and off. If someone else has any tips for a tighter "Dot" say 25mm or an inch at about 5' that would be great. but turning the lens either direction from current just increases the "Dot" size. Overall, I am not impressed, I was hoping for a dot size similar to those cheap cat toys you can get at walmart.

Works as described. Currently using two powered off a USB port to project IR dots for Nintendo Wii.

nice little laser module, easy to use, mechanically reasonably stable. lases at 984nm, about 4nm FWHM line width. supplying regulated 3.3VDC i get about 25mW optical output. didn't try the TTL modulation.

On regulated power supply, pulsed at 4 Hz 50% duty cycle, it lit up for about 30 seconds, I tried to focus it, as the lens was almost completely out on opening. It flashed a brief bright splotch, then quit, never to light up again. Don't waste your money.

It's an invisible beam viewable through a phone camera only in adim ambient environment. Nice little dot with a g8 lens, mounted with heat-sinked host. Proper eye protection is a must as well as avoiding direct, or reflected beam on camera lens.