![]() The GSM module can be used even without any microcontroller by using the AT command mode. You can download these softwares from the given links:īefore going into the schematics and codes, we learn about GSM module and its working. We will use CodeVisionAVR software for writing our code and SinaProg software for uploading our code to Atmega16 using USBASP programmer. Hence in this tutorial we will learn how we can Interface the GSM module (SIM900A) with AVR microcontroller ATmega16 and will demonstrate it by sending and receiving messages using GSM Module. This will open doors to lot of creative projects if it could be interfaced with a Microcontroller. ![]() You can also connect a normal microphone and speaker to this module and converse on your mobile calls. These modules could make all actions that our normal mobile phone could do, like making/receiving a call, sending/receiving a SMS, connecting to internet using GPRS etc. GSM modules are interesting to use especially when our project requires remote access. Read more: UV Sensor ML8511 AVR Atmega library We can use again the WebPlotDigitizer to find points from the “ Responsivity Characteristics” curve. Responsivity measures the input–output gain of a detector system. We may find the responsivity function of this sensor on the datasheet. If we are going to use this sensor under different thermal condition we can simply interpolate beween those function to get the correlation function slope “s” and intercept “i”.Īlso, that graph is for a wavelength of 365nm. More in general we can say that the correlation function looks like this: Note thate the accuracy of this method depends on the accuracy of your point extraction. We can now use liner regression technique to obtain the function we need to convert voltage output to UV intensity.Īlso notice that this graph has four functions for 75degree, 25degree, -5degree, -25degree temperature condition. Once we have flipped the graph we can now get the point from the graph using a tool like WebPlotDigitizer. We have Output voltage on the y axis and UV intensity on the x axis.īecause we want to obtain the UV intensity using the voltage that we can read from the sensor, we are going to flip the graph. The correlation function I propose here is derived by the datasheet graph of “ Output Voltage over UV intensity“.įrom this graph we can get the correlation function. Not all the energy of the UV spectrum has the same “damage” power, due to this the power spectrum is multiplied by a weighting curve known as the erythemal action spectrum, and the result integrated over the whole spectrum. ![]() The purpose of the UV Index is to help people effectively protect themselves from UV radiation. It is a linear scale, with higher values representing a greater risk of sunburn. The ultraviolet index or UV index is an international standard measurement of the strength of sunburn-producing ultraviolet (UV) radiation at a particular place and time. Here I’ve implemented a driver for AVR Atmega, portable to other microcontrollers, that correlates the sensor output to light intensity, it also computes the UV index based on the sensor input. By datasheet the sensor detects wavelength from 280nm to 560nm. The ML8511 is an ultraviolet sensor that output an analog signal correlated to the amount of UV light detected. Ultraviolet (UV) is an electromagnetic radiation with a wavelength from 10 nm to 400 nm.
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