Ultra Sonic Range Finder Scott Jackson smj161@psu.edu 217-2124

What does it do? The ranger finder uses sound to measure distance. The time between a sound being emitted and an echo being received tells how far apart the object and the range finder are.

Tech Specs Black Wire – Ground Blue Wire – Init White Wire – Echo Red Wire – VCC Black Wire – Ground Blue Wire – Init White Wire – Echo Min Max Unit Supply Voltage VCC 4.5 6.8 V High Level Input Voltage VIH (for Init) 2.1 Low Level Input Voltage VIL (for Init) 0.6 Delay time: Power up to Init High 5 ms Input current (with 2.1V in on Init) 1 mA Transducer Output Voltage (Peak to Peak) Typical: 400 Supply current during transmit period 2000

Speed of sound = ~760mph = 1114.67 ft/s ‘ For distance from time, use Y = rt/2 For time from distance, Y = 0.5(rt)

What Can We Use It For? Costs about $36 Security Systems Robots! Advantages Fairly Accurate Disadvantages Outside noise can affect echo signal