I have to admit this rabbit hole is deep and I still haven’t hit the bottom yet.
I am finally ready to do a run and acquire some real data. I am starting with the sun as a reference light source to minimize a few variables.
My test rig:
I have 6 sensors that record about 40 data points per measurement.
Once I polar align my mount it will track the sun accurately and keep the sensors aligned.
Hopefully it will see first light within the next few days. I will keep you all posted.
I have to follow this one. Science class.
Right. This will probably be like any other science class with a tendency to put one to sleep. But hopefully the final results will be interesting and useful.
I acquired a little over 100 measurements yesterday. It was a nice day with the sun popping in and out from behind the clouds.
For the moment I am still using LUX as a crutch to verify the accuracy of my sensors. This is two of my sensors measuring lux:
I need to sort out exactly why one is measuring lower than the other but the relationship is linear and they both converge to 0 at the origin.
A simple linear correction brings them both fairly close to on another. about 5% average error:
I guess I should ask you all if this is even the right place to post this stuff. Just don’t know about finding some math or physics forum and showing them my ‘weed’ meters.
Well looks like you have been busy and built a while new setup with multiple sensors.
I have 0 research other than your previous post but I’m interested to see what you do, so I’m following.
You’re in the lighting category so post away!
Latest update. I am very pleased with this run of measurments. Again, this is using the sun as a reference light source and my handheld LUX meter as the reference lux measurement.
This chart shows the LUX meter, 10-channel sensor and 2-channel sensor. They are so close you can barely differentiate between the three curves. Also, note how small the maximum error is. This is big step forward with my project.
