Most of the electronic equipment for scuba diving is battery-powered and it requires battery exchange after its discharging. This means that such electronic device has to be designed with special mechanical properties (e.g. by using o-rings) which make sure that it is capable of staying waterproof for extended period of time in tens of meters under the water. Hermetically sealed depth computer would not need the replacement of batteries and hence no special mechanical design of the battery holder. Its batteries could be charged wireless.
The intended scuba diving depth computer could indicate what is the most crucial for safe dives. It is the safe ascent rate during scuba diving. This could be achieved by continuous measurement of water pressure i.e. depth and its instantaneous changes in time (i.e. seconds). The initial version of the proposed device will be operating without any display and only using piezoelectric buzzer in order to signalize changing ascent rate of the diver. Main idea of the project is to provide additional electronic safety device with permanent battery in permanent hermetic sealing.
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