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Old 11-11-2007, 03:09 AM #1
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Default Homebrew Power Meter Graph

about 10 minutes with my manual resulted in this - a power graph of the output for my 35mw WL Executive Advanced over a 2 minute testing period.

note - this is not calibrated and uses only a simple CdS cell, so the unit is good for producing graphs only and not as a power meter
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Homebrew Power Meter Graph-sta71835.jpg  


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Old 11-11-2007, 03:13 AM #2
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Default Re: Homebrew Power Meter Graph

.
Attached Images
File Type: jpg power.JPG (436 Bytes, 198 views)
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Omnichrome 643 air cooled Ar/Kr ion 10mW 676.4nm 647.1nm 568.2nm 488nm 476.2nm (high hours)
Spectra Physics 127 >30mW 632.8nm HeNe | Uniphase 1.5mW 543.5nm GreeNe
Coherent Innova 90 argon ion water cooled ??W (got plasma, alignment in progress)
Coherent 60W 830nm water cooled diode brick | Shenhui Laser 40W 10600nm water cooled CO2

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Old 11-11-2007, 03:50 AM #3
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Default Re: Homebrew Power Meter Graph

woop :P
i thought that CdS cells where non linear. like logarithmic or something.
phototransistors are just as easy to use and are linear
i was going to use a PicAxe, which is a basic stamp clone in one chip, to generate a current/power graph
donno if you have seen the 'Researching a DIY power meter...' thread
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Old 11-11-2007, 03:55 AM #4
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Default Re: Homebrew Power Meter Graph

yea that's what made me think of it, and i would've used a phototransistor but i don't have any on me at the moment :-/
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Omnichrome 643 air cooled Ar/Kr ion 10mW 676.4nm 647.1nm 568.2nm 488nm 476.2nm (high hours)
Spectra Physics 127 >30mW 632.8nm HeNe | Uniphase 1.5mW 543.5nm GreeNe
Coherent Innova 90 argon ion water cooled ??W (got plasma, alignment in progress)
Coherent 60W 830nm water cooled diode brick | Shenhui Laser 40W 10600nm water cooled CO2

(9:03:50 PM) Picasso: the best guys i saw ever at burning man was two dudes dressed as all green army men shooting pants at naked guys
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