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High CMRR Instrumentation Amplifier (Schematic and Layout) design for biomedical applications

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Instrumentation amplifiers are intended to be used whenever acquisition of a useful signal is difficult. IA’s must have extremely high input impedances because source impedances may be high and/or unbalanced. bias and offset currents are low and relatively stable so that the source impedance need not be constant. Balanced differential inputs are provided so that the signal source may be referenced to any reasonable level independent of the IA output load reference. Common mode rejection, a measure of input balance, is very high so that noise pickup and ground drops, characteristic of remote sensor applications, are minimized.Care is taken to provide high, well characterized stability of critical parameters under varying conditions, such as changing temperatures and supply voltages. Finally, all components that are critical to the performance of the IA are internal to the device. The precision of an IA is provided at the expense of flexibility. By committing to the one specific task of
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DHT11 Interfacing with MATLAB and Arduino

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Abstract: In this project we are going to interface digital Humidity and temperature sensor (DHT11) with Arduino Uno board and with MATLAB. we are going to display the temperature and Humidity data, received from DHT11, in LCD screen and also plotting them in MATLAB simultaneously.

From the datasheet it mentioned that DHT11 outputs 40bits of data. It contains 8-bits integral RH data+ 8-bits Decimal RH data+8-bits Integral Temperature data+8-bits decimal Temperature data+8-bits check sum. Read datasheet[3] for more details. The library for DHT11 sensor is available in the resources. Add the library[4] in this path "C:\Program Files (x86)\Arduino\libraries\DHT11" (In my case). 

Connect DHT11 sensor to the Arduino Uno board as shown in the below figure and also plug your Arduino board to PC/Laptop.
Now open Arduino IDE tool and run DHT11_Arduino_code[1] and upload it on to the board.
Open MATLAB and run the DHT11_MATLAB_code[2].