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Metro 2033 Light Sensor Answered

I'm working on a Metro 2033 cosplay costume and being the gadget-geek I am I'd like to make a working copy of the light sensor Artyom carries on his wrist. For anyone who haven't played the game (or read the book, I bought it today but I don't know it he's got the same thing there) it's basically just three LED:s (red, yellow, green) that light up depending on how well illuminated you are (red=fully illuminated=people will see you instantly and shoot, yellow=partly illuminated=people will see you unless you take cover, green=as good as invisible unless you give away your position with noise or flashlight).
In the game it's abut the size of a 9v battery but flatter and for simplicity I'd like to keep it like that; I don't fancy carrying around an Arduino or something like that on my wrist.
Here's a picture:
http://bi.gazeta.pl/im/5/7534/z7534645X,Metro-2033.jpg

So, my question is: Is it possible to make something like that small and simple enough to be stuck to a wristband?

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mpilchfamily

4 years ago

A small micro controller with an LDR and the LEDs and your set. Just program the micro to light each LED as the voltage across the LDR changes. Here is a project similar to what you want.

https://www.instructables.com/id/Arduino-Light-Sens...

Keep in mind arduinos come in all shapes and sizes so you can get one small enough to suit your needs and still read the LDR and light the LEDs.

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Jurmpilchfamily

Reply 4 years ago

Thank you!
I don't know much about programming (yet) but I think I can get that to work.
Sorry about the late reply, I saw your suggestion but didn't have time to answer and then promptly forgot about it.