PACKAGE INCLUDED: Arduino uno with usb cable – 1 Ultrasonic sensor HC SR04 – 1 Breadboard 400 point – 1 Jumper wire Male to Male – 40 pieces Jumper wire male to female – 40 pieces8*8 Matrix Module – 1 Welcome to the Arduino Based Project which consists of 8*8 LED Matrix Module and HC-SR04 (Ultrasonic Sensor). First, It should be made sure that circuit connections are appropriate for desired results. Here, we used the 8*8 matrix module with ultrasonic sensor to display the pattern with ultra-sonic sensor. If we are in range of ultra-sonic sensor it will display smile in matrix module or else it will display no smile. Ultrasonic sensor is a sensor that works on principle similar to radar or sonar. It generates high frequency sound and calculate the time interval between the sending of signal and the receiving of echo. Therefore, ultrasonic sensor can be used to measure distance. HC-SR04 ultrasonic sensor consists of a transmitter, a receiver and a control module. The working principle of a ultrasonic sensor is as below: 1. Send at least 10us of HIGH signal to trigger pin. 2. Detect the pulse width of echo signal sent back.3. Apply some calculation to get the distance.
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