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![]() | #1 | |||
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Class 3R Laser |
The design is not yet final but here are some stuff that I have finished. ![]() I started with a heatsink from FT (link) and machined it to accept a 12mm stubby module from DTR. ![]() I like this new module (haven't seen it before) It makes good contact to the back part of the 9mm diode for better heatsinking. ![]() The heatsink does seem "a little" small for the job but this will be fan cooled so the large surface area with the fins will help. I won't know until I get this all arranged and powered up. Once the module was in, I had to test it. First light!!! (fan behind the heatsink for cooling) 2.9W at 2.3A with a G2 lens. Machining makes a bit of aluminum dust Planned arrangement of the parts Heatsink and driver will be placed inside the PVC tube to make a wind tunnel for more efficient cooling. Since I got an average efficiency diode, I'll probably be underdriving this at around 2.2A for less heat. 2.5W should still be plenty for burning stuff. Hopefully, I get to complete this before the new year so that I can use it to light fireworks. ![]()
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF Last edited by djQUAN; 12-24-2013 at 05:43 AM. | |||
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![]() | #2 | |||
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Class 4 Laser Join Date: Feb 2013 Location: Masshole
Posts: 5,047
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Love to see how this turns out but slightly worried about the size of the heat sink. IMO its not large enough to handle a 9mm for more than 30sec on 60 off. Yes the area of the heatsink might be large but there isn't much material there.
__________________ Please Read: Sticky- Complete Guide To Owning Lasers Sticky- FYI: New Search Function Laser collection: Blue & Black Marble Kryton Groove 445nm- ![]() ![]() Polished Minisabre V2 462nm - 250mW Red & Black Marble Kryton Groove 635nm- 500mW Custom Titanium PL520- stable 80mW M43vn, Crelant 7G2CS dedomed, Armytek Barracuda, SupBeam K40vn, SupBeam X40, Niwalker Vostro Mvn, Convoy C8 2015 version, Shadow SL3, Crelant 7G5CS, L3 L10, 2x 365nm UV Flashlights, Red P60 Dropin | |||
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![]() | #3 | |||
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Class 3R Laser |
Yeah, I'm thinking about it too. But once I get to test it I'll change it if necessary to handle the heat of the 9mm. Worst case, it'll end up as a labby with a larger fan haha
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF | |||
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Class 3R Laser Join Date: Aug 2012 Location: PH
Posts: 1,125
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Since it's actively cooled the heat shouldn't build up too much that when passively cooled. Well, at least in theory. Why don't you entirely drill out the heatsink so that more of the module contacts the heatsink. | |||
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![]() | #5 | |||
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Class 3R Laser |
That's all the depth my micro mill could drill into. ![]()
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF | |||
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![]() | #6 | |||
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Class 3R Laser Join Date: Jun 2011 Location: across the river from the big easy
Posts: 1,485
Rep Power: 1948 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
if you could get that copper module all the way in i think that heat sink will be plenty.
__________________ i have fond memories of owning 10 hene tubes 2 argon ion units and lots of diode and dpss lasers in these wavelengths: 405,445,450,458,473,488,532,543,594,612,632,635,650,685,780 I'm rebuilding my collection: Skyray 405 12x kryton groove gitd 445 B&W Tek 473 lab laser JDSU 2214-40 multiline argon ion Osram pl520 in an sh-032 host Skylaser HL532-300 543 HeNe 632 HeNe x3 Opnext 638 single mode in c6 host Rayfoss 650 150mW Laserbee II Deluxe lpm w/ Peregrine ![]() Laissez les bons temps rouler! | |||
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![]() | #7 | |||
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Class 3R Laser |
It's the deepest I could drill using my micro mill. I would risk breaking the bit by going deeper and if I use a drill, the bottom surface won't be flat which won't get good thermal contact to the back of the module. We'll find out soon once I can do some more tests ![]()
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF | |||
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![]() | #8 | |||
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Class 3R Laser |
A little update on the electronics side. (For those that don't care about how the circuit will work, just scroll down for the pics ![]() We start with an off the shelf driver. We take two of [this] and modify it. The circuit is basically what's in the LTC1700 datasheet. Even the part numberings on the PCB are the same! So this "driver" is basically a 4.2V to 5.18V step up DC to DC converter with a 1 ohm current limiting resistor. Much like you'd add a resistor in series with an LED to be able to operate it in higher voltages. It works but isn't very efficient and a small change in the diode Vf changes the output current and we don't want that. The solution? I used a ZXCT1009 inserted in the circuit feedback path and a few parts changes to make it a constant current supply. So we set one at around 1.1A, the other at 1.4A and then parallel them. Add switches and connect them to the RUN/SS pin of the LTC1700 and you can control the output much like a TTL control ![]() I used two in parallel since I'd need over 2 amps for the 9mm diode and I've tested that one could push up to only 1.8A. The advantage would be by using two buttons, pressing only one gives either 1.1A or 1.4A current, then by pressing both at the same time, you get full power! ![]() This is getting too long. On with the test setup pics. Modified drivers wired in parallel I changed the inductors since the original one cracked from too much fiddling. I didn't have the right value on hand so I used the nearest one. Test setup. Large string of 3A diodes and amp meter test load. Power source is 2x Panny 3400 cells in parallel. Both drivers ON. Sorry it's fuzzy, camera couldn't focus on the display I might drop the maximum current by a few notches but I didn't have the right resistor value so I'll be rummaging through the scrap boards but it's getting late so it'll have to wait.
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF | |||
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![]() | #9 | |||
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Class 3R Laser |
A little more work done tonight. I decided 2.5amps might be a little too hot so I put both drivers back to 1.1A. Then I was able to make a small bracket/heatsink that mounts behind the diode heatsink. The white rubbery thing in between the drivers and the heatsink in the middle is thermally conductive silicone pad. Here it is powered up and the drivers in standby mode I used only one button for now and when you push it...
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF | |||
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![]() | #10 | |||
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Class 3R Laser |
Today's progress: I made a bracket/sled type thingy to hold the batteries, switch and everything else together. I also added a battery gas gauge so I know when the batteries need charging. This thing draws about 3-4amps from the batteries since I used two boost drivers. I was supposed to go to the farm on Wednesday to use the lathe there but I couldn't wait so off to my micro mill again. ![]() I let it go as deep as I could and used the shortest lenght of PVC that can hold the heatsink in place so it would fit in my mill. Seems to ave worked. ![]() Toggle switch is the main power switch. Pressing the button opposite the toggle switch turns the laser to full power 3.1Watts of blue! Sorry about the blurry pics. My hands were a little more shaky than usual at the moment. ![]()
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF | |||
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![]() | #11 | |||
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Junior Member Join Date: Dec 2013 Location: Sin City / Snow City
Posts: 19
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Even after a year since giving up facebook (new years resolution 2013) I find myself looking for the "like" button on this post. I've kept an eye on this build. Nice job. What color of spray paint are you going to finish it off with? Merry Christmas! ![]() | |||
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![]() | #12 | |||
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Class 3R Laser |
Thanks, I'm not really sure yet. The PVC tube is sort of temporary and I also need to make a cover for the electronics part. I think I also need to make a guard for the fan. My finger touched the blades a few times while playing with it haha
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF | |||
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![]() | #13 | |||
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Junior Member Join Date: Dec 2013 Location: Sin City / Snow City
Posts: 19
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I wonder if a black plastic stand-up extension tube for a shop vac would be the right size for the external sleeve? Questions, can you hear the fan? I know it might sound a little silly, but I've been thinking about some sort of sound effect when the rig fires up. Blue and orange might look cool..... | |||
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![]() | #14 | |||
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Class 3R Laser |
My other issue would be that I think paint has a hard time sticking to PVC. I'll try and keep a lookout for a nicer tube. The fan is a little noisy since it is not the best quality but it does the job ![]() One thing I noticed, I powered this on side by side with my 1.7W and this one is a lighter blue. I'm guessing it's a shorter wavelength. 445nm? 440nm? Let's see if the camera can pick it up...
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF Last edited by djQUAN; 12-24-2013 at 09:15 AM. | |||
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![]() | #15 | |||
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Class 3R Laser Join Date: Aug 2012 Location: PH
Posts: 1,125
Rep Power: 115 ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Lighter blue? It should be higher than 445nm then. You have a lot of interesting builds lately. Keep us posted. Rep when I can. ![]() | |||
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![]() | #16 | |||
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Class 3R Laser |
Haha sorry my mistake. I was typing in a hurry and mixed them up. It's christmas vacation so I have a bit of spare time to work on laser stuff ![]() Here are some pics I took just now. I think I'll keep the PVC. Having the heatsink protrude just a bit allows me to touch it and see if it's getting hot LPM reading Scorch marks Everyone's favorite... Top: 1.7W laser Bottom: 3W laser
__________________ My DIY Electronics site 650nm: ePay 3pack 120+mW 635nm: 190mW Opnext 16340 532nm: cheapie single 16340 7mW, 77mW labby and ePay 3pack 8-26mW 520nm: 100mW Spikey 445nm: 1.4W DIY side button 3W Fan cooled handheld 450nm: 100mW Pen host w/ parallel 10440 405nm: 150mW compact single 16340 150mW aixiz labby and ePay 3pack 79mW DIY Ophir based compact LPM Posting Pics in LPF | |||
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Laser pointers and modules | This thread | Refback | 12-25-2013 04:56 AM |