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Monolithic microcomputer , its various function component being in a piece of integrated chip inner computer has composed one kind of monolithic style microcomputer. The monolithic machine is had the function is strong , volume is young , reliability is tall, be geared to the needs of under the control of sum price is cheap wait for a series of merit. Photodevice has the glowing component and photosensitive component two major kinds. Give luminescence component to lead to with electric

current , the glowing component is only capable to do giving out light. Light irradiates to photosensitive component , photosensitive component output electric current only is capable to do change. The treatment function designing that the maximal characteristic is that the switch characteristic property and monolithic machine having made use of every photodevice's are big and powerful originally, has accomplished the function reckoning by time , announcing the hour at the regular time.

System function: The timing gives an alarm to music and guiding lights glimmers speedily.

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