| 摘要 |
PURPOSE:To keep a floodlight on for a preset time after turning it off by immediately turning it on at the time of setting a switch on and turning it off after the preset time at the time of setting the switch off. CONSTITUTION:When a person says ON, the sound enters a voice recognizing unit 3 via a microphone 1 or the like. If it coincides with the voice data of ON of 4-2, for example, an electric lamp 10 is immediately turned on. When the person says OFF, if the sound coincides with the voice data of 4-6, an H- level is outputted from an output terminal OFF-2. The H-level signal sets a flipflop 12. The output Q is made an H-level and starts the charge of a capacitor C1 via a variable resistor R1. When the charging voltage of the capacitor C1 reaches the preset value after an elapse of 10sec, for example, a flipflop 8 is reset via an OR gate 7. A light emitting diode 9-1 is then turned off, and the electric light 10 is also turned off. |
