Laser diode hookup

Otherwise he would either have already fried it or it would not lase at all due to undervoltage. Check out my experiments http: Something else to keep in mind is that laser diodes are typically 3-pin devices one pin is an output from a photosensor for feedback to the regulator for current control. I will not respond to Arduino help PM's from random forum users; if you have such a question, start a new topic thread. There is a small and inconsistent delay in that style of laser driver - which is basically just a current and voltage regulator.

That may also put too much draw on your Arduino, current-wise. If you are looking to gain high-speed control, then you will need to look into a modulated laser driver. The company didn't want me to sending it back. They charged me dollars for restocking fees too.

KY-008 Arduino Laser Module: Guide and Tutorial

I learned a lot from what little I did with it. I hope you guys can locate a decent module cause I want to do the same. What I was hoping to do was to remove a dust cap from the laser diode, engrave a bunch of company logo's on a 2ftx4ft sheet of acrylic, put the dust cap back on, and then cut out all of the parts as a semi seamless interaction. Thus having the laser on the cnc would be ideal and a Co2 laser is just way more than I need. I say acrylic but it will actually be polycarbonate so laser may be out of the question as the more research I do on polycarbonate, the more laser looks to be a no go.

This is my first CNC machine and already know that I will be using it to build a larger 5ftx10ft machine as my needs grow. If my ideas never take off then I have a fun hobby toy to dink around with, if they do take off then I will need something that I can run full sheets of plastics through as well as cabinet grade plywood.

Your Answer

I have been in the aquatics industry for some time and make my items by hand, so a CNC is a logical next step into speeding up production with much more precision and duplication. Cutting polycarbonate with a CO2 laser works, but the edges of the cut are charred and smell horrible.

Even with an enclosure and ventilation it stunk up the room. Separating the parts leaves an oily smelly residue on you hands, though it is easily cleaned up with soap and water. I purchased a similar 15W laser from AliExpress https: The laser won't turn on at all. I see 9kHz described above.

HACKED!: Laser Diode from DVD Burner -- Constant Current Source

I've messaged the seller, but am skeptical about the likelihood of a useful reply. You have to have an appropriate laser controller to modulate the current to the laser. The TTL input available on the laser controller should be allowing me to duty cycle the laser for effective current modulation.

How to connect laser module

My primary issue was user error in that, when wiring the TTL plug I used the wrong side of the provided plug cable which I'd cut in half, and wired the TTL polarity backward. The S value is not managing to provide a variable level of output. S and S both provide the same apparent power level. M3 S0 provides no power, so I am getting a response to the command.


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Even M3 S1 turns the laser as best as I can observe, fully on. If I'm providing an inappropriate frequency to the controller especially if it's expecting 1kHz like the JTech and I'm providing 7. I'll still change to the JTech fork but knowing that the rig works is wonderful!

How to Build a Laser Diode Circuit

I have a full set of 3D models printed for mounting the 15W laser and I'll be posting them. The mounts for the 15w laser, controller and power supply that I published are now up on Thingiverse: When engraving metal with a laser you need to look at the wavelength of the laser more than the power.

Each metal reflects different wavelengths of light better than others. How much energy it takes to etch the metal will depend on the reflectivity of your wavelength and how fast the metal dissipates heat.

I was curious about using a hobby grade CO2 laser to etch circuit boards, but it's next to impossible at that wavelength. I had access to a 50W Epilog laser. I can kinda-sorta engrave metal with the 15W.


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If I coat the metal with a black permanent marker or somesuch, I've been able to do light engraving on steel. I suspect I could improve it with multiple passes.