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This morning I was doing my daily eBay browsing and found a 250mw red module for just $7! I'm not really crazy about building lasers, but I thought it would be cool to put one of these modules into a pen host. I just wasn't sure how to accomplish this because I'm only used to spring modules in...

I'm talking about a device that will decrease the brightness without having to adjust the hardware. Can I put one of those cheap variable camera lenses in front of each of my lasers and be able to adjust the brightness of the laser through it?

Would something like this work to adjust the brightness? 62mm variable adjustable Neutral Density ND filter fader ND2 ND400 for SLR lens | eBay

I was just playing around with some old 3d movie glasses' lens and noticed that if you put 2 of them together, it becomes opaque. Rotating of the lens will make it more transparent. It will also allow more laser light to pass through. Is there a way to implement this in an rgb device to adjust...

Ok, thanks for all the info. I understand what the problem was. So do any of you know where I could get a prebuilt RGB system with analogue modulation for each module? Would it be cheaper to get the individual modules with analogue drivers? If so, where would I get them? Again, <$80 if possible...

Do you know if that 400mw white eBay laser have individual modules that I can adjust the output for?

I just want to make a white laser with adjustable modules. Is this possible for $80? I already have the batteries and mirrors.

That white laser is really cool. What outputs would you recommend for me if I want to keep the 100mw green? And the cheapest analogue modulated driver modules I found will add up to over $200!

So would this, this, and this solve my problem? And would 405nm still work to make white light if I give it a little more power?

I only have around $80 to spend and was hoping for a ~500mw total output with this this (100mw) and this (The 3 modules). I already have the heat sinks, dichros, and a bunch of 18650s for the project which leaves about $30 for the 3 things that will let me control the output of the lasers. Why...

Hi. I want to make an multicolor laser with 3 adjustable laser modules. I just don't know the right way to go about making one. I was thinking I should just get the 3 laser modules (w/ driver) and stick a potentiometer between the power supply for each laser. Is there a better way? Would...

Would they do that for $20?

I'm fine with an old flashlight. As an alternative, could I also get 3x303 hosts and attach the small extension pieces (which are the size of a 16340) together, and use that? Or this?

Hi! I'm having trouble choosing a 2w blue laser. I'm debating to myself about buying DTR's M140 Module with the glass lens for $53 and buy a driver and host on Ebay (total ~$80). However, I realized that there are some good options of prebuilt ones out there. My budget is <$120 for just the...

I guess it wouldn't hurt to get 3 pots for $10, even if it has little function. You said there would be a narrow range of resistance this would actually function for. Instead of 200 ohms, I'd rather get a pot of that range value so more, if not all, of the turns would effect the output. Would...

Would a 200ohm pot work? Which amount would be best?

So, without configuring the driver, it's nearly impossible to adjust the resistance of the diode by connecting a pot to the driver? With one of my cheap $3 Ebay green pointers, I put in 2x 1.2v rechargeable AAA batteries and the green dot was hardly visible (sometimes, it didn't even work), but...

I would make a linear regulator if I hadn't already bought the modules with the drivers. Would it still function if I connect it to the wires of a module (the driver) instead of directly to the diode? And will the same design work for all 3 modules?

Thanks for the informative reply, but I'm still confused on a few things. Are more amps better or worse? Is it possible to use a potentiometer on a module if it already has a driver? (without removing it) If so, what ohm pot should I get for each module (200mw, 100mw, and 50mw)? What effects...

I enjoy seeing new people taking interest in lasers. This is the best community to be a part of when passionate about something like this. Building lasers is as simple as connecting a diode to a driver and a power supply to the driver. You can also buy laser modules, which are normally a diode...