Do you want to save all the data directly to a SD memory card, but you don’t know how to DIY the PIC Based GPS to SD-card data logger? Well, don’t be frustrated about it anymore, as you’re going to build your very own GPS to SD-card data logger today!

This PIC based GPS to SD-Card Data logger is a very incredible stuff, with only a large capacity and reasonably long battery life, then it can be turned into a very useful device for logging GPS position!

If you refer to the above figure, you can see that the overall size of the complete unit is 75mm long, 50mm wide and 45mm tall, where 27mm for the top box and 18 mm for the 3XAA battery box.

The data from the GPS is logged every second with the raw NMEA sentences being written to the SD card. The data is being written to the card is the GSA, GGA, ROMC and GSV sentences, which by excluding the carriage returns this should never exceed 512 bytes per second. The total active power consumption is about 40mA to 45mA, and the 2000mAh rechargeable batteries can withstand up to 40 hours in practice!