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Do-It-Yourself SMS Alert System We receive many SMS alerts every day. These are automated messages that are broadcast to a list of mobile numbers. Ever wondered how the system works? Download source code | Do-It-Yourself Digital Soil Moisture Meter A soil moisture meter is used for indicating the water content of a given soil sample. As crop production requires water at different stages and in different amounts, it is important to measure soil moisture from time to time to know its status. Download source code | Do-It-Yourself GPS Distance Meter Presented here is a project based on Global Positioning System (GPS) and ATmega328P-PU microcontroller to measure the distance between two points using Haversine formula. Download source code |