How to make A light-up distance sensor

2013年3月10日 | By News | Filed in: News.

http://www.instructables.com/id/How-to-make-A-light-up-distance-sensor/
In this instructable, I will show you how to make a sensor that will light up more lights the closer you are to it. Materials: Arduino UNO Arduino ultrasonic ping distance sensor 3 green LED’s 2 yellow LED’s 1 Red LED 6 220 ohm Resistors USB Cable to connect Arduino Wires to connect everything P…
By: jreeve17

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