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Interface Humidity Sensor With AVR

Description

Humidity is the presence of water in the air. Humidity sensing is very important, especially in the control systems for industrial processes and human comfort.

  • The amount of water vapor in the air can affect many manufacturing processes in industries.
  • Humidity sensors are divided into two types:
    1. Relative humidity sensors.
    2. Absolute humidity sensors.
  • Humidity measurement can be done using
    1.Dry and wet bulb hygrometers,
    2.Dew point hygrometers,
    3.Electronic hygrometers.
  • More often Electronic hygrometers are called as Humidity sensor
  • Electronic type hygrometers or humidity sensors are classified into two categories:
    1. Based on capacitive effect,
    2. Based on the resistive effect.

Application

  • Weather Monitoring System.
  • Manufacturing Industry.

Hardware Required

  • Humidity Sensor.
  • Atmega16 MicroController.

Pin Diagram

  • VCC: +5v.
  • Output: Analog Output.
  • GND: GND.

Circuit

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