Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

DIY LPM "Kit" $40... Now with Calibration!

Joined
Mar 2, 2011
Messages
692
Points
0
EDIT EDIT:
Currently I'm too busy with school to do this,
At some point in the future I will start selling LPM's






NEW OFFER:
Anyone who buys this kit from me can mail me there finished LPM un-calibrated,
and I will calibrate it with a 1.5W 445nm blue laser at 25c against my ophir head
Free of charge, Simply include return postage
***


Price is $40 for the kit + Shipping

--------------------------------------

These are intended for people looking to build a DIY LPM,
The Kit handles the Electronics aspect,
and leaves the Optics to you.

What IS included:



What is needed:

  • Tec/Heatsink w/ coating, and Calibration.
  • Battery and Charging circuitry (If you want it to be portable)


The battery shouldn't be too hard to figure out for most people who have made a laser.
The boosting psu in these is quite flexable and will run on anywhere from 3V to 9V.
A single Lithium-ion works fine

-----------------------------------

As for the TEC I have a few posible recomendations,

1) Buy a tec, Buy a heatsink, Thermal Epoxy them together.
Coat the Tec w/ either flat black spray paint, or flat black grill paint.
Calibrate against an LPM or a known stable Laser


OR

2) Buy a used head on ebay like this:
++ SCIENTECH MODEL # 380101 LASER POWER METER HEAD | eBay
attach it to your LPM and calibrate it against an LPM or a known laser.


------------------------

The max power of your LPM will be dependent or your choice of TEC and coating,
But the Circuitry in this LPM can go up to 5W's

When selecting a tec Generaly speaking
  • The smaller the TEC, the faster you will get a reading
  • The higher the QcMax, The more likely your LPM will be accurate over a greater range.

-------------------------

photo2spz.jpg


photo1tc.jpg


photogcn.jpg
 
Last edited:





Re: DIY LPM "Kit" $40

So if i read correct this can be used with a ophir 20-C-1-Y head?

But the ophir head is precalibrated? And uses 2x 9V?
 
Last edited:
Re: DIY LPM "Kit" $40

A DMM is even less expensive...
The cost of an accurate LPM is not in the miscellaneous
electronic parts...


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
 
Last edited:
Re: DIY LPM "Kit" $40

So if i read correct this can be used with a ophir 20-C-1-Y head?

But the ophir head is precalibrated? And uses 2x 9V?

Using an ophir is a little tricky, but doable

1) Short out all 3 pins on the main adjust pot, (Permanently w/ solder)
2) Grab a 1.5V battery and a multimeter
3) Measure the Battery with the LPM and the multimeter at the same time
4) Make them the same by adjusting the 1X range pot (Unless it is already the same)
5) Switch the lpm to 10X and make them the same again (Unless it is already the same)

After you have calibrated it like this here is how to hook everything up:

ophir.jpg


The Chargers could be replaced with 9V batteries,
If you do that I would recommemd powering the LPM with a rechargeable 4.2V battery, because my lpm will drain a 9v faster than the ophir head.

Also if anyone is interested,
this meter would work with a 150C-A-.3-Y or a 150C-A-.1-C/ERB
but would require a different method of cailbrating
 
Last edited:
NEW OFFER:
Anyone who buys this kit from me can mail me there finished LPM un-calibrated,
and I will calibrate it with a 1.5W 445nm blue laser at 25c against my ophir head
Free of charge, Simply include return postage.

***Shipping and insurance for this process is the responsibilty of the buyer
 
Last edited:
I'd like to purchase it, PM me your paypal plz :)
 
Last edited:
Please PM me with calibrated LPM with TEC included, and shipping to South Africa.
 
Please PM me with calibrated LPM with TEC included, and shipping to South Africa.

The first Post reads......

----------------------------------
"Anyone who buys this kit from me can mail me there finished LPM un-calibrated,
and I will calibrate it with a 1.5W 445nm blue laser at 25c against my ophir head
Free of charge, Simply include return postage
***

What IS included:



What is
needed:

  • Tec/Heatsink w/ coating, and Calibration.
  • Battery and Charging circuitry (If you want it to be portable)"
----------------------------------

1) You need to buy the kit
2) You need to assemble it
3) you need to supply your own Sensor... Coating and Head
4) you need to send it all back for Calibration
5) you need to pay shipping 3 times


Jerry


You can contact us at any time on our Website: J.BAUER Electronics
 
Last edited:
I would buy it if you listed all the recommended parts to get to 3W. I dont like guess work like "power reading is based on your choice of components"
Just tell us the different components we need to buy to get certain outputs please :)
 
This is what I got:
Coating:
High Heat 12 oz. Flat Black Automotive Spray Paint-248903 at The Home Depot

TEC:
http://www.digikey.com/scripts/dksearch/dksus.dll?vendor=0&keywords=430801-504
(recommended by MarioMaster)

Heatsink:
513102B02500G Aavid Thermalloy | HS346-ND | DigiKey

Not sure what this combination will get me in terms of Max output, but my plan is to get it calibrated and to get the exact measurements from my lasers. Later I will try and change the combination of TEC/Coating/heatsink to determine the max power I could measure (using the known output from the lasers of-course).
 
Ok awesome. PLEASE report back with your findings, I really want to hear about it because I want to know what combo to use.
 
Ok awesome. PLEASE report back with your findings, I really want to hear about it because I want to know what combo to use.

I have ordered the wrong thermal adhesive and waiting for the correct one. Will assemble everything and send back to justinjja as soon as possible :)
 


Back
Top