| 摘要 |
PURPOSE:To enable finding of an elapsing time with no indication switching operation, by a method wherein in an elapsing time is automatically switched for the indication at intervals of a given time from a timer start togetherwith a sound. CONSTITUTION:An elapsing time timing circuit 4 starts to perform a timing operation from a point of time when a switch SW is pressed and released from press. After a given time has elapsed, a timing signal P1 is outputted from the elapsing time timing circuit 4 to set an RS.FF9a and drives a buzzer 10c, and simultaneously to switch (5) an indication of an indicator 7 to the details of the elapsing time timing circuit 4. When a timing signal P2 is outputted, the indicator 7 is switched (5) to the details of a timing circuit 3, and simultaneously a buzzer 10c stops sounding. Each time a given time has elapsed as described above, the buzzer 10c operates and the indicator 7 indicates an elapsing time. |
