| 摘要 |
a switching unit connected to an output port of a microcomputer, for switching output signal; and a sensor for outputting signal to first to third ports of the microcomputer, the sensor having an infrared diode mounted on a hooking protrusion within a cuisine of an microwave oven, for outputting light in accordance with the output signal from the switching unit, a reflecting sensor having phototransistors light-receiving reflection light, and a plurality of resistors.
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