This is a simple pocket-sized gps using an arduino nano board and low cost GPS module (NEO-7M). A small 128x64 OLED screen is used to display basic GPS information,such as latitude, longitude, date and time. As a bonus,the maindenhead locator is also displayed.
A breadboarded schematic is shown below (made with Fritzing. Credits to Robert Eisele for the Fritzing GPS module part and for the idea of using TinyGPS lib, and to user mtd from the Fritzing forums for the OLED screen part)
The project is built using PlatformIO and all the libraries required are copied into the libs folder so that you do not have to worry about having them installed.
The code is very straight forward and needs no special explanations.
A prototype was built in a 2-layer sandwitch form on a 3cmx7cm prototype board. It is a bit bulky as a lot of connectors are used but it can be made vey flat if the connectors are removed.
There are no photos of the gps while in operation as the multiplexing of the screen does not allow any decent photos to be taken.
References/Credits