// Smart Blind Stick System – Arduino Code // Define Pin Numbers based on circuit diagramconst int trigPin = 2; // Ultrasonic Sensor Trig pin connected to D2const int echoPin = 3; // Ultrasonic Sensor Echo pin connected to D3const int buzzerPin = 12; // Piezo Buzzer connected to D12 // Variables for … Read more
#include <Servo.h> Servo gateServo; const int trigPin = 9;const int echoPin = 8;const int servoPin = 10; long duration;int distance; // Gate positionsconst int gateClosed = 0;const int gateOpen = 90; // Distance at which car is detectedconst int detectionDistance = 15; void setup() {Serial.begin(9600); pinMode(trigPin, OUTPUT);pinMode(echoPin, INPUT); gateServo.attach(servoPin); // Start with gate closedgateServo.write(gateClosed); delay(1000);} … Read more
This Human Respiratory System Working Model is an excellent biology science exhibition project that demonstrates how breathing takes place in the human body. The model can be made using balloons, transparent pipes, cardboard, straws, and simple craft materials. The main working principle is based on the movement of air into and out of the lungs … Read more
An Automated Irrigation System using a Soil Moisture Sensor is a simple and useful science exhibition project that demonstrates how technology can be used to water plants automatically. The main purpose of this model is to supply water to a plant whenever the soil becomes dry and stop watering when sufficient moisture is detected. This … Read more
This Water Cycle 3D Working Model demonstrates the major stages of the natural water cycle—evaporation, condensation, precipitation, collection, and runoff—using a small humidifier and a DC water pump. It is suitable for a school science exhibition because the processes can be demonstrated visibly. Materials Required Step 1: Prepare the Base Take a strong cardboard or … Read more