SparkFun Forums 

Where electronics enthusiasts find answers.

For the discussion of Arduino related topics.
By LetSmokeOut
Hello. A friend and I are trying to build an accurate light meter using the Arduino microprocessor in conjunction with the GDM1602K LCD screen (both ordered from sparkfun). The problem is that neither of us have any experience in programming and neither of us have the time or motivation to teach ourselves. I'm wondering if perhaps there might be already written programs available which we can use. Surely we aren't the first ones to attempt to construct a light meter? We want our light meter to show the numerical measurement of ambient lux (just like the handheld light meters used by the professionals do). Can anyone please link or copy and paste the code necessary for us to accomplish our goal? I realize the code may in part depend on the photo diode we use to detect light, but any generic code used for this application would be sufficient for starters so long as we would only need to change some values to tune in the desired accuracy. If anyone is a programmer hobbyist of sorts and would be willing to help us by writting a program from scratch that would also be something very much appreciated.

Please help in any way you can. We are very eager to finish our little fun project.
By glassfog
#114172 will output a signal that you can read with an Arduino. is basically a photoresistor with sensitivity peak in green - 540nm. ... Xqyxtx.pdf outputs a voltage proportional to the light intensity but is dependent on supply voltage to determine full scale.

What is your application? Do you have a particular spectrum or intensity range in mind?

Again, I recommended the TSL230R and the discussion by Roaming Drone as it provides the things you asked for in your original post. He provides a breadboard setup and code examples, check it out.
long long title how many chars? lets see 123 ok more? yes 60

We have created lots of YouTube videos just so you can achieve [...]

Another post test yes yes yes or no, maybe ni? :-/

The best flat phpBB theme around. Period. Fine craftmanship and [...]

Do you need a super MOD? Well here it is. chew on this

All you need is right here. Content tag, SEO, listing, Pizza and spaghetti [...]

Lasagna on me this time ok? I got plenty of cash

this should be fantastic. but what about links,images, bbcodes etc etc? [...]