Both IR sensors are connected to the interrupt pin of Arduino, and they detect the falling wave. The purpose of using interrupt is that, it improves the efficiency of system. A LCD is connected to Arduino and measured speed is shown on LCD. When car moves in front of the first sensor, ...
Firstdefine trig and echo pin of HC-SR04in the program. In this project the trig pin is connected to GPIO9 and echo pin is connected to GPIO10 of Arduino NANO. int trigPin = 9; // trig pin of HC-SR04int echoPin = 10; // Echo pin of HC-SR04 Define pins for input of LM298N ...
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Pro mini Atmega328P Pro Mini 328 Mini ATMEGA328 3.3V 8MHz 5V 16Mhz for Arduino Compatible Nano CP2102 FT232RL $1.54 Min. order: 10 pieces Easy Return LM3886 IRS2092 2.1 Channel Digital Amplifier Stereo High Power Amplifier Board 50W*2+100W $40.50 - $54.40 Min. order: 1 piece Easy Retur...