Digital depth meter

摘要

The invention relates to an electronic dive depth meter with a digital display. Pressure measurement by means of a piezoresistive pressure sensor. Measuring range 0-10 bar. The output signal passes to the display via an A/D transducer, resolution of dive depth 10 cm, dive depth 100 m, extension to 200 m by using a pressure sensor 0-20 bar without change to circuitry. Supply voltage of the system 9 V. When the battery voltage drops to approx. 7 V, a sign is triggered in the display via an Exor gate and signals change of battery. Illumination can be switched on by pressing a button.