The LM35 is rated to operate over a −55°C to +150°C temperature range. In this circuit LM35’s output is connected to the Arduino’s A0 pin, which converts the available output voltage value to a float ...

I made this project because I wanted a way to automatically control the speed of a DC fan according to the temperature read by a LM35 sensor. I had a few problems with the PWM part mainly because the ...

When the temperature exceeds the threshold (e.g., 30°C), the Arduino sends a signal to the NPN transistor's base through a 220Ω resistor. This switches the transistor on, allowing current to flow ...

LM35 Sensor: Connect VCC of LM35 to 5V on Arduino. Connect GND of LM35 to GND on Arduino. Connect the output pin of LM35 to A7 (analog input) on Arduino. LEDs: Connect the long leg (+ve) of each LED ...

VCC is the supply pin of the DS18b20 Temperature Sensor that can be connected to 3.3V or 5V of the supply. GND is the ground pin of the DS18b20 Temperature Sensor IC and it should be connected to the ...

By the way, we’ve covered a PID library for Arduino before. While this post talks about temperature, PID control is used for everything from flight control to levitation.

Enter the ExtraCore library for Arduino, a software library that turns two or more Arduinos into a multi-core microcontroller with more pins than you’ll ever need.