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 […]
Hobby Circuits
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 […]
Arduino IR Remote Control RGB LED Circuit
This Arduino project changes RGB LED color with IR remote; press one button and LED changes fast; no touch, no switch, only remote use; IR sensor reads signal and Arduino drives LED and it feels like small smart light; also this Arduino IR Remote Control RGB LED Circuit is easy to build. Arduino Code: Code […]
Obstacle Detection Circuit with 555 Timer and Ultrasonic Sensor
Want to build a smart obstacle detector without using Arduino? then this simple project uses a 555 timer and an ultrasonic sensor to sense distance and control a DC motor automatically. Also, it is easy to make with low-cost and perfect for beginners in electronics; therefore, this Obstacle Detection Circuit with 555 Timer and Ultrasonic […]
Simple School Project Multimeter Circuit
Touch electricity and learn easy way! This Simple School Project Multimeter Circuit show how current and voltage work in real life; with one battery, one resistor, one ammeter and one voltmeter, we can measure electricity at home. Also, it is fun, simple and good for beginner to see how circuit really flow. Circuit Working: Parts […]