This circuit is for Simple Over-Temperature Warning Indicator Circuit using an LED. It is very simple and is with low cost as it uses few easily available components. The circuit turns ON an LED when temperature rises above a set level like 45°C – 55°C. Therefore, it is useful for basic thermal warning. This circuit […]
Heater and Temperature Controllers
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. […]
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 […]
Temperature Controlled LED Circuit
This small Temperature Controlled LED Circuit can feel the heat! When place near warm thing, it sense temperature and LED glow. It work very simple using one diode and one transistor only. No microcontroller, no sensor IC, just few parts. We can build it easy at home and see how heat make light turn ON. […]
Simple Digital Thermometer Circuit with IC LM35
This is a small and Simple Digital Thermometer Circuit with IC LM35. It uses LM35 sensor IC. The circuit show temperature in voltmeter. It is cheap and very easy to make. Good for students and DIY beginners. Circuit Working: Parts List: Component Value Quantity Resistors 10k 1 Preset 2k 1 Semiconductors Voltmeter 200mV 1 IC […]
Dual LED Temperature Indicator Circuit
Dual LED Temperature Indicator Circuit light one LED when hot and other when cold. It uses IC LM35 temperature sensor, CA3130 op-amp and two BC547 transistors. IC 7805 change 9V to steady 5V and if there is 5V already then we can connect directly. IC LM35 gives 10mV more for every 1°C rise. Output goes […]