I bought a Ping Ultrasonic Range Finder. It has four pins that you connect to the Arduino. I see in Internet that they have three pins. What does represent each pin and where to connect it to? I have an Arduino Uno Starter Kit.
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1The sticks (they are really called pins) have these little white marks next to them. They're called letters. You read them and they tell you what the pins do.– Majenko ♦Oct 15, 2015 at 19:01
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@Majenko It's so thin I don't think I will read something there.– Pichi WuanaOct 15, 2015 at 19:05
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1I said next to not on.– Majenko ♦Oct 15, 2015 at 19:08
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@Majenko Right, you're right. What does it mean "echo", "vcc" and "Trig"?– Pichi WuanaOct 15, 2015 at 19:15
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1 Answer
You have 4 pins.
- Vcc: +5V supply voltage (it stands for Collector Voltage)
- GND: Ground.
- Trig: Causes an ultrasound pulse to be generated (it stands for Trigger)
- Echo: Tells you when an echo has been received.
You can see how to wire and use it here: http://www.instructables.com/id/Easy-ultrasonic-4-pin-sensor-monitoring-hc-sr04/
