This article is for simple Laser Light Alarm Circuit using Arduino. A laser light shines on an LDR. When someone blocks the laser beam, the LDR changes its value. Arduino reads this change and turns ON the buzzer to make alarm sound. A reset button stops the alarm. The system is low cost and easy […]
Laser Security Alarm Circuit using LDR and BC547 Transistors
This project is for Laser Security Alarm Circuit using LDR and BC547 Transistors. It uses LDR, two BC547 transistors, one diode and a buzzer. When laser light breaks an alarm rings. Circuit is cheap and very easy to build. Good for door security, box security and drawer protection. Circuit Working: Parts List: Component Value Quantity […]
Simple Sound Sensor Circuit with Arduino
This project show how to use sound sensor with Arduino. Sound sensor detect clap or loud voice. When sound come, Arduino turn ON LED and buzzer. This project for Simple Sound Sensor Circuit with Arduino help beginner understand sensor working. Arduino Coding: Code Explanation: Circuit Working: Parts List: Item Quantity Resistors 220Ω 1/4 watt 1 […]
Arduino and Joystick LED Controller Circuit
This project shows how to control many LEDs using one joystick and Arduino. The joystick moves in X and Y direction. Arduino reads this movement and turns ON or OFF the LEDs. This Arduino and Joystick LED Controller Circuit is simple to build. Good for beginners and Arduino lovers. Arduino Coding: Coding Explanation: Circuit Working: […]
Measuring Bend Angle using a Flex Sensor Circuit
Flex sensor is a small strip that changes resistance when we bend it. When straight, resistance is low. When bent, resistance becomes high. Many projects use this sensor. It is used in robots, gloves, gaming, medical tools and wearables. Sensor works simple with more bend gives more resistance. Flex Sensor Output Voltage Comparison Graph: Circuit […]
Arduino Flex Sensor Circuit
If we want Arduino to feel the movement, flex sensor is best. No click, no sound only smooth bending. It bends and Arduino gets new value every time. Perfect for beginners who want to control things by bending. Simple circuit, simple code, powerful idea. Arduino Coding: Code Explanation: Circuit Working: Parts List: Item Quantity Resistors […]