| 摘要 |
PURPOSE:To simplify the operation, by controlling the setting and temporary and complete stoppage of the alarm with one operating member while the operation time and temporary stoppage time of a switch are counted with one control circuit. CONSTITUTION:When setting the alarm, a switch 23 is kept opened. An alarm switch 22 is closed at a desired time and an alarm signal is amplified with a transistor 18 to generate an alarm tone from a speaker. To stop the alarm tone, a push knob is pressed. With a lead switch closed, the switch 23 is closed to generate a differentation output from a differentiation circuit 14. This resets flip flop circuits 6 and 7 and a time counting circuit 5 to block the passage of the alarm signal by closing a gate circuit 9. |
