This Arduino Based Motion Dog Barking Alarm Circuit make dog sound when motion detects. it uses Arduino Nano, Pir sensor, Dog Sound Module, BC547 transistor, IC LM386 Amplifier Module and 8Ω Speaker. Pir senses human or animal move. Arduino play dog bark sound to scare intruder. This is simple and low cost security system. Circuit […]
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Arduino Based Entry Exit Monitoring Circuit
This Arduino Entry Exit Monitoring Circuit counts people while entering and leaving place. It uses Arduino UNO R4 WiFi board. Two IR sensors detect people. Two servo motors control entry and exit gates. Sends crowd count to Arduino IoT Cloud. Helps know how many people are inside anytime. Circuit Coding: Code Explanation: Circuit Working: Parts […]
Water Quality Test Circuit using Arduino and Turbidity Sensor
Water looks clean but can hide dirt we cannot see. Tiny dust, clay and silt make water cloudy. This cloudy thing is called turbidity. More turbidity means more dirt and bad water. Less turbidity means clean and safe water. This project uses Arduino and turbidity sensor to check water. It shows result on LCD and […]
Arduino with Non Contact Liquid Sensor Circuit
Arduino with Non Contact Liquid Sensor Circuit is useful to detect water or any liquid without touching it. It is called contactless sensor. It works on capacitance change near container wall. Sensor sense water inside plastic or glass without direct contact. It is safe, easy and clean project one should give it a try for. […]
Arduino Piano Music Keyboard with Memory Circuit
This project is for Arduino Piano Music Keyboard with Memory Circuit. Main parts are Arduino Uno, push buttons, buzzer, LCD and resistors. When button is press then buzzer make piano sound. LCD show note name on screen. We can record notes and play again later. It is small and fun project. Good for learning Arduino, […]
Sound Sensor Direction Circuit using Arduino
Sound is everywhere. Sometimes we want to know from which side sound comes. Example in robot or in security. With Arduino and some sound sensor we can find sound direction. In this circuit we used four sound sensors and one OLED display with Arduino. OLED show which side sound comes. This project for Sound Sensor […]