| 摘要 |
PURPOSE:To display tide graphically with small-sized constitution by calculating basing on a harmonic dividing method and driving a dot matrix display. CONSTITUTION:When the year, month and day are inputted with key switches, a CPU performs process control corresponding to the program of an ROM, calculates and determines flood levels and ebb levels by the calculation with four component tides, etc. basing on a harmonic dividing method with less items for calculation, and controls a driver for a dot matrix display. The tides are graphically displayed with respect to time axes with the small-sized constitution by the above-mentioned simple calculation method. |
