I'm not sure how to say it, but I would like to read the 'amount of light' with my Raspberry Pi. By the 'amount of light' I mean a number between 0 and 100 (for instance) where 0 is no light/dark and 100 is lots of light (which is, as I understand, some arbitrary number, 'lots of light').
The problem is: I've read that the Raspberry Pi only has digital input/output ports, not analogue inputs. Is there still a way to read analogue inputs, and if so, what hardware do I need?
To set the level of knowledge: I did manage to output control LEDs via the RPI.GPIO library. I did not READ any input yet.