This is an overview of concept, Petty Potty (formerly Put Me Down). Our main sensor is the magnetic reed switches that detects if the seat is down (magnets touching) or up (magnets apart). That and a mini DF player is connected to the Arduino. The DF player's main role is to store an mp3 file of the screaming via a mini SD card so that we don't need to import the audio via code.
For the output, the Arduino is connected to a battery powered speaker to play and amplify the audio file. We played around with the power source from a direct wall socket to a battery, but ended up going with plugging it directly to a outlet for reliability.
This is the entire setup within the bathroom:
This is a close up of how the system will be installed on the toilet:
This pseudo code depicts the decisions made within the code on whether to check for the seat being up/down and whether to play the audio:
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