现在的楼道都安了声控灯,只要人们的脚步声重一些,灯就会亮。根据这个原理,我们可以研制出一种声控发光芯片,它的体积很小,也就是我的小指头那么大,可以放在墙壁、床、衣服,甚至书里。当黑夜我们遇到紧急的事,又摸不着灯,我们只要大声喊一句,声 The corridors are now sound-controlled lights, as long as people’s footsteps sound heavier, the light will be bright. According to this principle, we can develop a light-emitting chip, it is very small, that is, my little finger so big, you can put the walls, beds, clothes, and even books. When the night we encounter an emergency, they can not touch the lights, we just shout one, sound