Ultrasonic Sensor pack of 4

The HC-SR04 Ultrasonic distance sensor consists of two ultrasonic transducers. The one acts as a transmitter which converts electrical signal into 40 KHz ultrasonic sound pulses. The receiver listens for the transmitted pulses. If it receives them it produces an output pulse whose width can be used to determine the distance the pulse travelled. As simple as pie! The sensor is small, easy to use in any robotics project and offers excellent non-contact range detection between 2 cm to 400 cm (that’s about an inch to 13 feet) with an accuracy of 3mm. Since it operates on 5 volts, it can be hooked directly to an Arduino or any other 5V logic microcontrollers. Here are complete specifications: Operating VoltageDC 5V Operating Current15mA Operating Frequency40KHz Max Range4m Min Range2cm Ranging Accuracy3mm Measuring Angle15 degree Trigger Input Signal10µS TTL pulse Dimension45 x 20 x 15mm HC-SR04 Ultrasonic Sensor Pinout: Let’s take a look at its Pinout. VCC is the power supply for HC-SR04 Ultrasonic distance sensor which we connect the 5V pin on the Arduino. Trig (Trigger) pin is used to trigger the ultrasonic sound pulses. Echo pin produces a pulse when the reflected signal is received. The length of the pulse is proportional to the time it took for the transmitted signal to be detected. GND should be connected to the ground of Arduino.