RussellMc wrote:
> I want to source a lux meter for someone in Houston.
> Should read at least to 100,000 lux (nominal full sunlight) - most
> such go to 200,000 lux.
>
> Quality, accuracy etc is very non critical. This is for doing some
> very simple and low accuracy comparison tests so absolute calibration
> is unimportant. A modicum of consistency between readings would be
> nice.
>
> I looked at Fry's and Radio Shack sites and found either nothing at
> all or very expensive units (relative to what's needed.)
>
> This was available for $75
> http://actionelectronicswholesale.com/401027-LIGHT-METER-FOOT-CANDLE-LIGH=
T-METER-P3255.aspx
> but I see that they have closed down - and something should be
> available retail in Houston.
>
> Any ideas on what's available?.
>
>
>         Russell
>   =20
Here's a fairly inexpensive approach I used, using a TAOS TSL-232 chip. =20
I used a PIC18F25K20, a TAP-28 application board and a Handspring Visor=20
for I/O.  The code was written using the free Amicus (aka Proton) Basic=20
compiler.  The irradiance meter is in use by a friend in evaluating=20
configurations for a solar panel array.   It's reasonably calibrated to=20
agree with expected irradiance levels.

http://www.clever4hire.com/throwawaypic/tap-28-applications/irradiance-mete=
r-1

Let me know if you need any additional details.


Jon



--=20
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