Shaker Alarm

This are parts required for a bacteria culture shaker alarm. The purpose of the project was to prevent people forgetting to turn on the bacteria culture shaker again. Normally, the process is to turn off the shaker, take/place cultures and turn on again. In many institutes, I have witnessed people (definitely NOT me ;) :P) forgetting to turn on again the shaker. If this remains unnoticed for hours, this can ruin experiments or timeline of researchers, which is really annoying. To prevent such forgetful acts, I wanted to remind everyone to turn on the shaker. Basically, it outputs light and sound to annoy people. It detects halted shaking via IR light path sensing, which is in this case immune to background light variations.