The sensor can be pointed at an object, and the Arduino can sense the brightness of that one point. Since this camera compiles an image so slowly, it sometimes has a problem with varying brightness.

So, here are five cool ideas you can bring to life by combining your Arduino microcontroller with a Raspberry Pi SBC. Ever ...

CHDK can be run from the SD card, so no permanent modifications need to be made to the camera. [AlxDroidDev’s] device runs off of an ATMega328p with Arduino. It operates from a 9V battery.