Arduino Line Follower Robot Circuit uses sensors and motors. IR sensors look at floor all time and they find black line and white area, Arduino read these sensor signals and then it tell motor driver what to do. Motor driver control wheels speed and direction and then robot follow black line by itself. Arduino Code: […]
Sensors and Detectors
Simple PIR Motion Detector Circuit
This simple and easy circuit uses a PIR sensor to detect human motion; when motion happens, PIR output goes high and this high signal turns ON an LED through a resistor. Also, this Simple PIR Motion Detector Circuit is easy to make and works with 12V supply. Circuit Working: Parts List: Components Value Quantity Resistors […]
Simple Thermistor Based Fire Alarm Circuit
This Simple Thermistor Based Fire Alarm Circuit is very small, simple and smart, as it uses a thermistor to sense heat fast; when temperature goes high the circuit wakes up and makes loud sound. Here, this circuit uses no microcontroller or complex parts, but it uses only a few components and provides a working fire […]
Fire Alarm Circuit using IC LM358
This Fire Alarm Circuit using IC LM358 is simple but smart, as it uses a 10k thermistor and LM358 IC; also it watches heat using a thermistor and makes buzzer ring when danger comes. Additionally, this circuit is cheap and is good for home, school projects and safety demos. Circuit Working: Parts List: Components Value […]
Smoke Detector Circuit using IC LM358
This circuit is for simple Smoke Detector Circuit using IC LM358, as it uses MQ2 gas sensor to sense smoke; also it uses LM358 IC to compare sensor voltage. Therefore, when smoke is present the buzzer and LED turn ON and, in addition, this circuit is good for beginners. Circuit Working: Parts List: Components Quantity […]
MQ2 Gas Sensor Circuit with Arduino
The MQ2 Gas Sensor Circuit with Arduino is a low-cost sensor, as it can catch bad gas in air very quickly. When we connect it with Arduino, we make small gas alarm system; it reads gas level, show number on LCD and buzzer make sound when gas goes high. Also, this circuit is very simple […]