This project show how to make a simple Arduino Based Pulse Monitoring Circuit. It uses Arduino Nano, pulse sensor, OLED display, buzzer, an LED. The system reads heartbeat from finger sensor. Then Arduino calculate pulse per minute. OLED show result. LED and buzzer give alert when pulse go high or low. Circuit is simple and […]
Sensors and Detectors
IR Sensor Based Stick for Blind Circuit
This circuit turns a normal stick into a smart safety tool for blind users. It helps blind person know if any object is near. It uses IR sensor, transistor, buzzer and a 5V regulator IC. IR sensor sees what human eyes cannot. This IR Sensor Based Stick for Blind Circuit is with low cost and […]
DIY Arduino Based Weather Station Circuit
This DIY Arduino Based Weather Station Circuit is very easy project. It uses Arduino Uno, DHT11 sensor, 16×2 LCD and one potentiometer. The LCD show temperature and humidity on screen. The potentiometer controls LCD contrast and brightness. The wiring is simple and the code are also very easy. Anyone can build circuit this at home. […]
Arduino Line Follower Robot Circuit
Arduino Line Follower Robot Circuit uses sensors and motors. IR sensors look at floor all time. They find black line and white area. Arduino read these sensor signals. Then it tell motor driver what to do. Motor driver control wheels speed and direction. Robot follow black line by itself. Arduino Coding: Code Explanation: Circuit Diagram: […]
Simple PIR Motion Detector Circuit
This circuit uses a PIR sensor to detect human motion. When motion happens, PIR output goes high. This high signal turns ON an LED through a resistor. Simple PIR Motion Detector Circuit is easy to make and works with 12V supply. Circuit Working: Parts List: Part Name Value Quantity Resistors 220Ω 1/4 watt 1 Semiconductors […]
Simple Thermistor Based Fire Alarm Circuit
This Simple Thermistor Based Fire Alarm Circuit is very small, simple and smart. It uses a thermistor to sense heat fast. When temperature goes high the circuit wakes up and makes loud sound. No microcontroller, no complex parts. Only few components and we get a working fire alert that anyone can build at home Circuit […]