This is a small Arduino tone generator project. It uses Arduino Uno, one buzzer, one potentiometer to change the pitch. This Arduino Pitch Control Circuit using Potentiometer is simple and easy to make. It helps beginners understand PWM, analog reading and digital output. We can use this project to learn basic sound making using Arduino. […]
Audio Oscillator Organ Circuit
This article is about small Audio Oscillator Organ Circuit, we can hold in our hand. It plays simple notes and make funny tones. It uses very simple parts and shows how oscillator make sound. And also shows how amplifier make sound big. It works on low voltage which is safe for kids. It gives a […]
Simple Infrared Fire Alarm Circuit
This is Simple Infrared Fire Alarm Circuit for beginners. It use infrared receiver sensor to detect fire heat or flame light. When fire come close sensor output changes. Then LED glow and buzzer makes sound. This circuit is cheap and easy to make. It also use only few parts like BC547 transistor, LED, buzzer, IR […]
Laser Light Alarm Circuit using Arduino
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 […]