| 摘要 |
PURPOSE:To utilize a timepiece with a barometer to schedule an excursion, leisure, sports, work, etc., by displaying the variation state of future weather according to the result of comparison between atmospheric pressure which is a constant time before and present atmospheric pressure which is obtained by a comparing circuit. CONSTITUTION:A timing pulse generating circuit 14 operates at constant intervals of time with the output of a timer circuit 6 and a power source control circuit 15 operates with its output to supply electric power to an A/D converting circuit 9, an amplifier 8, and a pressure sensor 7. The output of the pressure sensor 7 is converted by the circuit 9 into atmospheric pressure data, which is supplied to a latch circuit 10. The circuit 14 generates a latch pulse after the circuit 9 generates the atmospheric data, which is latched by the circuit 10. The output of the circuit 10 is supplied to the comparing circuit 12 and compared with the output of a storage circuit 11. The circuit 11 is stored with last atmospheric pressure data, which is compared with the present atmospheric pressure. The comparison result and the atmospheric data of the circuit 10 are supplied to a selecting circuit 13 and prescribed displays are made on display parts 2, 3, and 4.
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