| 摘要 |
PURPOSE:To reduce costs with a simple construction by displaying a time shorter than the specified time with turning ON or OFF a display element indicating the half of the unit time to lessen the required number of digits of number numerical display elements. CONSTITUTION:As a timer switch 10 is depressed, a signal is inputted into a corresponding input port of a microprocessor 14 and the time set is increased by 30min unit while displayed by a numerical LED1 and a surface LED2. When a timer sart switch 11 is depressed, a signal is inputted into a corresponding input port of the microprocessor 14 and subtraction of elapse time is started from the time set to display the remaining time by 30min unit by the numerical LED1 and the surface LED2. |
