I'm Almost Ready For 20W!!!

[scumbagatheist]

Just a teaser...

 

[Blord]

LOL, 20Watt laser power or 20Watt measuring power ?

 

[scumbagatheist]

In this case, a 20W LPM sensor...No sense in investing in CO2 if I can't measure it!
:crackup:

 

[Livinloud]

did you make those "wings"?

 

[scumbagatheist]

The "fins" are the heatsink from an AMD Avalon processor package I picked up for $3. I cut it down w/ a hacksaw and drilled it out to screw-mount the side pieces and will use ceramic thermal adhesive to stick the top piece down. It will then be mounted to the project box/PS for the unit to go with my DMM.

This is more than enough heatsinking that I can measure up to 20W lasers...if I work out a better PS system for it...something wall-plugged.

 

[sinner]

Woaah! That's a monster 20C Ophir now, I would point all my 445nm's just for shits n giggles!

Btw where are you going with this? 5 diode kit ? :eg:

 

[jeffreythe00]

Neat!

I'm still waiting on mariomaster to finish converting my analog 20W coherent meter to digital. Just be careful you don't scorch the coating off! :beer:

 

[Pi R Squared]

Now watch him buy a 40W CO2 and not be able to measure it.
Good job though SBA.

 

[jeffreythe00]

Now watch him buy a 40W CO2 and not be able to measure it.
Good job though SBA.

Hahaha, that would be quite an expensive mistake!

 

[Livinloud]

SBA i know they are heat sink fins, i said wings because it reminds me of some flying eye from some sci-fi movie......not my day cuz i cant think of what one either

 

[ARG]

Going to have to use 4x 9V batteries to get 20W out of that!

Edit: I apologise for the late night miscalculation :tired:
Two 9V batteries in a 2S2P configuration would only give about 14-18V which is not enough for 20W.

 

[scumbagatheist]

Thanks, all. I am ultimately planning on using an 18VDC laptop PSU to power this setup. I just have to figure out the circuit. It will be complete with a high-current DPST switch and banana jacks to plug into a DMM and a USB connector for a future ARG board with data logging in it. In the meantime, I am going to enjoy this bulletproof DIY setup.

I still have another Ophir that I can build another heatsink for and package together for anyone who wants it!!

 

[ARG]

I just have to figure out the circuit.

Check out this thread:
http://laserpointerforums.com/f51/help-ophir-head-panel-meter-1-battery-68648.html#post990191
There's some good ideas there.

I like JIB's rail splitter design, but you'll need 36V to get 18V out of each rail and I think that OPA is only rated for 35V

 

[djQUAN]

For a rail splitter, you can use this circuit:
Project 43 - Simple DC Adapter Power Supply

If you're a little more adventurous, you can use this:
Low Power Negative Supply For Cars

a little more parts but uses the commonly available 555 timer IC. Add some regulators at the output and you get symmetrical regulated outputs. It shouldn't be too hard to build onto a breadboard.

 

[scumbagatheist]

Thanks for the suggestions, guys! You saved me some searching time!

 

[lasersbee]

Going to have to use 4x 9V batteries to get 20W out of that!

Won't get you 20Watt output on the OPHIR 20C-Y-1 according
to the Data Sheets.


Jerry