This project is a first step in trying to alleviate swimming pool or tub accidents (i.e. children drowning) by warning the occupant(s) of the house that something or someone is in the water. It foregoes old-fashioned buzzers, bells or sirens and instead uses high-quality digital audio and speech ISD2560. It is designed to be very user-friendly and expandable. The main idea is to have the pool safety system connected to the home’s main alarm, intercom and/or stereo system for the alarm’s audio playback in any room.
The project uses Renesas M16C/62P microcontroller as main processor. It uses 33794 eFIELD sensor to detect if a person is in the water; placing the electrode (a coaxial cable) in the water does this. Digitized audio is via Winbond’s ISD2500 series of CHIPCORDER ICs. For highest quality sample rate and a full minute’s worth of audio messages alarm, the project uses Winbond’s ISD2560 chipcorder ICs.
Project Firmware, Schematic and Documentation