作者: Wing Kit Lui
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摘要: A flashlight senses when it is picked up, and then automatically turns on. When the released or set back down, off. Touch contact sensors sense touch of a human hand, causing circuit in to switch on light source, such as an LED. The advantageously designed so that grasped fingers user's hand lay over sensors. Various types may be used. operate electrically, without any movement, moving parts.