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Just finished work on a sky quality meter with built in wifi. The device is based on the ambient light sensor TSL2591 and the wifi board ESP32. Communication between the two boards is through I2C. The device has a 40 degrees lens.
The light sensor is programmable, which means you can set integration time (from 100 to 600 ms) and gain (from 1 to almost 5000, in 4 steps). I implemented automatic adjustment of these parameters to allow for the highest dynamic range (600M:1 accoring to the spec sheet).
The device shows Sky readings as a web page. It is connected to a local wifi network, although it could also create its own access point. So far I haven't been able to calibrate the sqm yet, partly due to eternal cloud cover. But it should only require one parameter to be adjusted.
The code is available on GitHub. Sky-Quality-Meter
Here are som pictures.
The parts connected:
The finished device:
This is how output is presented:
I was told by a friend who has close ties with the council that Basildon District are abandoning their part-night lighting in a few weeks. Apparently the street lights which currently go off at 1am are going to be left on at cost of circa £275,000 per year. They are supposedly going to fund this from reserves.
Anyway, did a bit of googling and found this https://www.basildon.gov.uk/article/7711/In-the-news-Councillors-united-behind-plan-to-switch-street-lights-back-on-through-night
I wonder how many people will notice!
I'm new here and thus question has been on my head all day. Tell me your thoughts! The light pollution is p******* me off!
Just found this. https://www.bbc.co.uk/newsround/amp/49836623
Let's hope it is a success and the good folk of Switzerland enjoy some clear dark skies.
I gave a demonstration/workshop at my local Astro Group* about a simple way of removing light pollution from an Astro Photo.
The description I gave was deliberately for beginners, using a wide angle tripod shot photo and using one of the easiest packages to get to grips with (Paint.net).
The attached pdf covers the basic technique.
I'd appreciate any feedback on it.
* The Mid Cheshire Astronomical Group - all welcome, we meet on the last Friday of the Month.