Electronic barometer with pressure sensor and speech output - uses pressure sensor with analogue to digital conversion and speech output of current pressure

摘要

The barometer comprises an initial stage for measuring the atmospheric pressure using a pressure sensor (9) followed by a stage of amplification (10). The electrical signal proportional to instantaneous pressure is digitised using an analogue to digital conversion stage. The barometer includes circuits for voice synthesis, a Read Only Memory storing appropriate messages and an audio amplifier output stage (6). The unit may be activated to give an audible output of current pressure either by manual control or by automatic detection of the passage of a person. ADVANTAGE - Electronic barometer with speech output removes need to see scale.