Automatic Humidifier For The Textile Industry Using Arduino

The Automatic Humidifier For The Textile Industry Using Arduino system operates as a closed-loop environmental control circuit designed to maintain stable atmospheric moisture. At the core of the setup is an Arduino Uno R3 microcontroller (MOD1), which coordinates the sensing and actuation processes. Environmental data is gathered continuously by a DHT22 (S1) humidity and temperature sensor. The DHT22 measures the relative humidity of the surrounding air and transmits digital signal readings back to the Arduino Uno R3 via a designated data pin. The Arduino processes these incoming digital metrics against pre-programmed threshold logic written using the Arduino IDE. When the detected humidity drops below the required threshold for maintaining textile integrity, the microcontroller changes the state of its digital output pin connected to the 5V SPDT relay module (RL1). The relay acts as an electrically isolated electronic switch; when energized by the 5V control signal from the Arduino, it closes its internal contacts to complete the circuit for the external ultrasonic humidifier. This activation causes the ultrasonic humidifier to begin generating moisture mist, raising the ambient humidity in the room. Once the DHT22 sensor detects that the humidity has returned to the desired target range, the Arduino commands the relay module to open its contacts, cutting power to the humidifier and halting mist production. The entire system is powered reliably by a dedicated 5V adapter or a standard USB 5V power bank, ensuring stable operation of both the logic components and the relay driver circuit.