Vacation part 3 of 4: Motion Sensor On The Cheap

One of the kids’ bouncing ball toys deflated and naturally I had to cut it open – it had blinky lights inside!. And how do you go about making a light blink whenever the ball smashes into something? Really, really cheap? You make a simple switch using a spring. When it hits the ground the spring bends thus closing the circuit. Pure genius in all its simplicity.

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