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Old 10-08-2012, 02:26 PM #17
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

I apologize for double post. But this is new information and I believe it justifies my breaking of the rules:

I got the calibrated LPM back on Saturday, and remeasured all my lasers. Justin also sent me a PM saying that the configuration of the TEC, Heatsink and coating layers resulted in a sensor that was able to measure his most powerfull ~3W 445nm laser (this one perhaps: http://laserpointerforums.com/f39/fs...5-a-77438.html) after calibration. In addition he confirmed the measurements of his 635nm lasers.

I have initially wanted to use a smaller heatsink, but decided to use an existing CPU aluminum heatsink. The surface to which the TEC was glued (using Arctic Silver Epoxy) was sanded with the finest grade sandpaper I could find in Lowes. Cleaned with alcohol and the TEC was glued. I have used the press with rubber pads to push the TEC as close to the metal as I could and let it dry for several hours.

After that the heatsink and TEC were sprayed with multiple layers of above mentioned Rust-oleum spray letting individual coats dry off for a minute or so.

Then I connected the sensor to the wires from LPM and determined which wire is positive and which is negative (shined the laser, if the neg values grow, switch the wires around). Soldered everything back together and done.

Below are some of the pictures:

Red LPC-815 650nm Diode running at 450mA, aixiz glass red lens


m140 445nm diode running at 1.267A, 405-G-2 (Rochester precision optics A671 or A610 lens)


S06J 405nm diode running at 745mA 405-G-1 (Rochester precision optics A671 or A610 lens)


And here I flipped the ranging switch to high on the same laser:


I actually ran it in High first and than flipped to Low so the reading went up a bit in the meantime. In any case the ranging circuitry works fine.


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My lasers:

405nm : PHR-803t in Dorcy Jr. Old Style with Ehgemus heatsink: 102mW
405nm : Bluray in SAIK SA-305 at 745ma: 980mW
445nm : Guidesman Dual E-Drive: 1.6W
650nm : LPC-815 @ 0.45A in Ehgemus Host Easy Build: 293mW

List of 12x 405nm 5.6mm diode builds

Last edited by gillza; 10-08-2012 at 02:34 PM.
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Old 10-09-2012, 07:23 PM #18
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

It'd be great if you could sell the whole thing for say 100 USD.

I don't mind assembling/soldering but having to find the TEC, properly coat it and send back for calibration is too complicated, specially for non-US members. It's a lot harder to find the proper parts overseas and international shipping isn't exactly cheap..

In fact if someone sold just the calibrated "head" I'd probably be willing to make the rest myself if needed.

Sorry for the rant :P
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405nm: NewWish (29.1mW avg|5mW rtd) | Dilda (81.5mW avg|200mW rtd) | 501B by Blord (633mW pk)
low 445nm: C6 from Survival Lasers (1351mW pk|1289mW avg|1100mW rtd)
high 450nm: NewWish (12.6mW pk|5mW rtd) | Dominator by Blord (3010mW pk|2779mW avg during 5min)
462nm: 501B by Atomic (1507mW avg)
473nm: BWB-10-OEM labby by CNI (10mW rtd)
~462-476nm "Tunablue" by Atomic (1.5W pk)
low 520nm: MXDL pen by DTR (31.6mW pk|28.8mW avg)
high 520nm: Laserlands (8mW avg)
532nm: NewWish (28.6mW pk|26.8mW avg|10mW rtd) | Dapper (30.3mW pk) | Classic (120.0mW pk|103.1mW avg|100mW rtd) | "The Green Box" by Atomic (176.7mW pk|140.0mW avg)
589nm: Spartan from Dragon Lasers (58.4mW pk|37mW avg|50mW rtd)
632.8nm: HeNe pointer by Atomic (0.68mW rtd)
635nm: NewWish (4.6mW avg|5mW rtd)
638nm: Classic from Lazerer (409.3mW pk|389.4mW avg|415mW rtd)
650nm: NewWish (10.6mW pk|5mW rtd) | Dilda (216.3mW avg|200mW rtd)
685nm: laser-in-a-box by Atomic (30.4mW pk|29.3mW avg) | 501B by Atomic (32.4mW avg)
780nm: module (2.7mW avg|5mW rtd)
808nm: Classic modded from a 532nm (162mW avg)
850nm: module (8.8mW avg|7mW rtd)
980nm: NewWish (81mW pk|5mW rtd) | 2nd line around 490nm

5W Ophir LPM

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Old 10-09-2012, 07:25 PM #19
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

You can find OPHIR heads on ebay for 180$ US, precalibrated.
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My lasers:

405nm : PHR-803t in Dorcy Jr. Old Style with Ehgemus heatsink: 102mW
405nm : Bluray in SAIK SA-305 at 745ma: 980mW
445nm : Guidesman Dual E-Drive: 1.6W
650nm : LPC-815 @ 0.45A in Ehgemus Host Easy Build: 293mW

List of 12x 405nm 5.6mm diode builds
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Old 10-09-2012, 07:31 PM #20
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

My budget limit for an LPM is about 150, unfortunately. Also I'm fine with buying cheap stuff there but I'm kinda cautious of buying expensive stuff from unknown sellers :/
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405nm: NewWish (29.1mW avg|5mW rtd) | Dilda (81.5mW avg|200mW rtd) | 501B by Blord (633mW pk)
low 445nm: C6 from Survival Lasers (1351mW pk|1289mW avg|1100mW rtd)
high 450nm: NewWish (12.6mW pk|5mW rtd) | Dominator by Blord (3010mW pk|2779mW avg during 5min)
462nm: 501B by Atomic (1507mW avg)
473nm: BWB-10-OEM labby by CNI (10mW rtd)
~462-476nm "Tunablue" by Atomic (1.5W pk)
low 520nm: MXDL pen by DTR (31.6mW pk|28.8mW avg)
high 520nm: Laserlands (8mW avg)
532nm: NewWish (28.6mW pk|26.8mW avg|10mW rtd) | Dapper (30.3mW pk) | Classic (120.0mW pk|103.1mW avg|100mW rtd) | "The Green Box" by Atomic (176.7mW pk|140.0mW avg)
589nm: Spartan from Dragon Lasers (58.4mW pk|37mW avg|50mW rtd)
632.8nm: HeNe pointer by Atomic (0.68mW rtd)
635nm: NewWish (4.6mW avg|5mW rtd)
638nm: Classic from Lazerer (409.3mW pk|389.4mW avg|415mW rtd)
650nm: NewWish (10.6mW pk|5mW rtd) | Dilda (216.3mW avg|200mW rtd)
685nm: laser-in-a-box by Atomic (30.4mW pk|29.3mW avg) | 501B by Atomic (32.4mW avg)
780nm: module (2.7mW avg|5mW rtd)
808nm: Classic modded from a 532nm (162mW avg)
850nm: module (8.8mW avg|7mW rtd)
980nm: NewWish (81mW pk|5mW rtd) | 2nd line around 490nm

5W Ophir LPM

HV: Flyback, Plasma Speaker, The Arcsynth and SSTC
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Old 10-30-2012, 02:58 AM #21
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

This kit still for sale?
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Old 11-17-2012, 08:27 PM #22
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

I am interested as well.
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Old 11-18-2012, 04:23 AM #23
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

Like atomicrox, I want an LPM for under $150 and I cannot afford 3 trips of overseas shipping as it costs me at least $30 each time as I live in New Zealand.

I want to measure up to about 3.5W. What parts do I need? Can you get them and calibrate it? I can build it.
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Old 11-18-2012, 12:31 PM #24
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

Never mind, thanks though...just bought a Scientech PM with Head for under $100
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Old 02-02-2013, 09:15 PM #25
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

would you sell a complete set? I am new and dont know too much about buying these parts, but I really need a lpm, since I have many 1000mW green laser pointers, well thats what it says in the sticker but i doubt it, I need to check actual power
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Old 02-02-2013, 09:29 PM #26
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Default Re: DIY LPM "Kit" $40... Now with Calibration!

Quote:
Originally Posted by r4mn33k View Post
would you sell a complete set? I am new and dont know too much about buying these parts, but I really need a lpm, since I have many 1000mW green laser pointers, well thats what it says in the sticker but i doubt it, I need to check actual power
You can already know for certain unless they costed >$1000 that they are more like 10mW to 100mW.
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