Arduino Ultrasonic Sensor Kodu. The ultrasonic sensor hc sr04 includes four pins. Led with 220ohm resistor connected to pin12 of arduino.
Arduino ultrasonic sensor mb1040 lv maxsonar ez4 by maxbotix the maxbotix inc maxsonar ultrasonic sensor line has become a very popular sensor for operation with the arduino micro controller. Kits boards shields much more. Overview if you have been experimenting with the arduino platform im sure you have at some point played around with the hc sr04 ultrasonic sensor module.
Here it is used to measure distance.
Echo pin this pin sends a signal pulse to arduino. Its easy to use pretty inexpensive and easy to find. The hc sr04 ultrasonic sensor uses sonar to determine the distance to an object. The arduino microcontroller controls the whole system.