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GPS Circuits



The Global Positioning System (GPS) is a space-based global navigation satellite system (GNSS) that provides location and time information in all weather, anywhere on or near the Earth, where there is an unobstructed line of sight to four or more GPS satellites. The GPS project was developed in 1973 to overcome the limitations of previous navigation systems,[1] integrating ideas from several predecessors, including a number of classified engineering design studies from the 1960s. 
A GPS receiver calculates its position by precisely timing the signals sent by GPS satellites high above the Earth. Each satellite continually transmits messages that include the time the message was transmitted
precise orbital information (the ephemeris) the general system health and rough orbits of all GPS satellites (the almanac).
Three satellites might seem enough to solve for position since space has three dimensions and a position near the Earth's surface can be assumed. However, even a very small clock error multiplied by the very large speed of light the speed at which satellite signals propagate results in a large positional error. Therefore receivers use four or more satellites to solve for the receiver's location and time.
The very accurately computed time is effectively hidden by most GPS applications, which use only the location. GPS has become a widely deployed and useful tool for commerce, scientific uses, tracking, and surveillance. GPS's accurate time facilitates everyday activities such as banking, mobile phone operations, and even the control of power grids by allowing well synchronized hand-off switching.


Back in 2010 business marketing student Yasir Afifi found a tracking device (an Orion Guardian ST820) hidden underneath his car

In this project the data regarding the geographical coordinate is extracted from the GPS output with the help of the Arduino and send it to a remote PC with the help of Xbee transceiver.

This project shows how to get location in latitude and longitude coordinates using an electronic circuit built with the Arduino Mega 2560 and the ITEAD GPS Shield v1.1 . If you want to see how to d...

using the above code for SIM900 GSM/GPRS Module on ARDUINO 328. While uploading the above code to the ARDUINO 328 I am getting the Following Error. I st Time sketch_jun16a.ino:1:20: error: SIM900.h...

Now that your GPS-module is ready, we can go ahead. Connect your GPS wires to the Arduino like on this schematic below. Where "pin 5" gets used as "TX" and "pin 3" as "RX". Any available pins on yo...

This new version (old Arduino GSM shield) has several new hardware features, that allow maximum customization and provide many configurations. We begin with the supply circuit a simple LM7805. To w...

Homemade GPS Receiver for Upcoming UAV Project

gsm and gps based vehicle tracking system with complete project report, code ...

Awesome Electronics Workshop LCD and GPS

DG vs SK PiP GPS Circuit Park Zandvoort Hotlap Comparison