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 ...

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.

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.

PWM pins work the same way across all Arduino boards, so you don't need to go out of your way to buy a Mega if you already have a board supporting PWM. On the Uno, Nano, and Mini, the PWM pins are ...

pinMode' is a built-in Arduino function that sets how a given I/O pin on the Arduino behaves - either input or output. In this case, we're telling the Arduino to use pin LED_BUILTIN (13) as an ...