Dual LED Temperature Indicator Circuit light one LED when hot and other when cold and 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, then IC LM35 gives 10mV more for every 1°C rise. […]
Heater and Temperature Controllers
Temperature Based DC Fan Controller Circuit using Transistors
Temperature Based DC Fan Controller Circuit using Transistors turns ON when hot, stops overheating and saves energy, then thermistor checks temperature and runs fan as needed. Also, the circuit works on 12V battery or 12V power supply. Circuit Working: Parts List: Components Values Quantity Resistors (All resistors are 1/4 watt unless specified) 1.5k 1 1k […]
Temperature Controlled Fan Circuit for Audio Amplifiers
Amplifiers make heat when working, also too much of heat make it work bad and can die soon; therefore, this Temperature Controlled Fan Circuit for Audio Amplifiers keep amplifier cool. Fan starts only when amplifier is hot and if volume is low and less heat then fan stays OFF and saves power. Also, the circuit […]
Adjustable Thermostat Circuit using IC LM56
An electronic adjustable thermostat controls temperature in heating or cooling systems, as this adjustable thermostat circuit uses the low-power IC LM56 chip to switch between two temperature modes. First, it controls outside transistor for output load and then IC LM56 give reliable, precise temperature control. Moreover, it is good for many uses like check temperature […]
DIY Temperature-Controlled Fan Circuit with Arduino
Modern devices and homes need good temperature control and this circuit help gadgets live long and make place comfortable. One example is fan with temperature control, fan change speed by room temperature and this keep temperature okay, save power and with less noise. Furthermore, the LM35 sensor measures the temperature and when the temperature becomes […]
Arduino Temperature Controller Circuit using DC Fan
This article show how to make Arduino Temperature Controller Circuit using DC Fan Arduino UNO, LCD, transistor, DHT11 sensor and with few resistors. Also, it show temperature and fan speed on LCD and control fan speed based on room temperature in home or office; then fan turns ON and OFF automatic when temperature goes above […]