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interfacing of humidity sensor with 8051 microcontroller pdf - jinulenin - 08-16-2017 interfacing of humidity sensor with 8051 microcontroller pdf Abstract This project is about a simple humidity sensor based on 8051 microcontroller. Humidity sensor is also called hygrometer. This circuit can sense relative humidity (RH) from 20% to 95% at an accuracy of 5%. The humidity information is displayed on a 16 2 LCD display. A relay is also provided which is set to be active when the humidity crosses a certain trip point. The circuit is mains operated and it is very easy to install. DHT11 is the humidity sensor used here.DHT11 is a low cost humidity cum temperature sensor which has a digital output. Capacitive method is used for sensing the humidity and a thermistor is used for measuring the temperature. The sensor can sense relative humidity from 20% to 95% at a resolution of 5%. Temperature measurement is up to 50 C at a resolution of 2 C. The communication with the microcontroller is through a single wire. Interfacing Humidity Sensors Family Models : Atmel, NXP, Philips, 8051, 8052, 89C51, 89C52, 89S51, 89s52, 89C1051, 89C1051, 89C2051, AT89C4051, AT89S8252,l AT89C1051, AT89C2051, AT89C4051, P89C51RB+, P89C51RC+, P89C51RD+, P89C51RB2Hxx, P89C51RC2Hxx, P89C51RD2Hxx, P89C660, P89C662, P89C664, P89C668, P89C669, P89C51RA2xx, P89C51RB2xx, P89C51RC2xx, P89C51RD2xx, P89C60X2, P89C61X2,P89LV51RB2, P89LV51RC2, P89LV51RD2, P89V51RB2, P89V51RC2, P89V51RD2, P89V660, P89V662, P89V664. About Humidity Sensors Humidity sensor is used to detect the quantity of humidity from the environment. Humidity is measured into percentage and different types of Humidity Sensors are used to measure humidity. With interfacing with microcontrollers it becomes a standalone system to measure the percentage in the environment. Relative humidity/temperature and relative humidity sensors are configured with integrated circuitry to provide on-chip signal conditioning. Absorption-based humidity sensors provide both temperature and %RH (Relative Humidity) outputs. On-chip signal processing ensures linear voltage output versus %RH. Sensor laser trimming offers +5 %RH accuracy and achieves 2 %RH accuracy with calibration. Packages are chemically resistant and operate in ranges of -40 C to 85 C [-40 F to 185 F] to accommodate harsh environments. They are following types: Relative Humidity Sensor Digital Humidity Sensor Soil Humidity Sensor Humidity And Temperature Sensor Humidity Sensor Switch Humidity Sensor probe Applications Of Humidity Sensors 89C51 89C52 89S51 89S52 Microcontrollers Relative Humidity Sensors are used in every fields. It has lots of importance and plays an important role in measuring Humidity from environment. They are also useful in all applications where humidity compensation is needed. It is used to develop following applications : Office Automation Applications Automotive Cabin Applications Air Control Applications Home Appliances Applications Industrial Process Control Systems & Applications Refrigeration And Cooling Systems & Applications Drying Systems & Applications Meteorology Applications Battery Powered Systems Applications OEM Assemblies and Applications Offical Applications Features Of Humidity Sensors Full interchangeability with no calibration required in standard conditions Instantaneous desaturation after long periods in saturation phase Compatible with automatized assembly processes, including wave soldering, reflow and water immersion High reliability and long term stability Patented solid polymer structure Suitable for linear voltage or frequency output circuitry Fast response time Individual marking for compliance to stringent traceability requirements. interfacing of humidity sensor with 8051 microcontroller pdf - tamannal - 08-16-2017 sir,i want to humidity sensor interfacing to 8051 micro controller project report in pdf format |