Building a Magellan 315 Data Transfer cable

NOTE: All information provide AS IS, and no warrenties are given or implied. I or any of the associated people on this page cannot be held responsible for any damage that occurs! This is what it looks like:



Here is how you do it:

Get a piece of thinish wood. Then drill one hole in the center, this is where the center bolt will go that holds the adapter on the GPS. Then take a piece of paper and hold it over the Mag315 back. make a drill template out of this, and mark the location on the center hole and the four metal contact pads. Next take this pice of paper and put it on your wood, aligning the center hole mark with the hole already drilled hole in the piece of wood. Drill four holes, where the screw will go. Put the screws in, and check the alignment of the four screws with the metal contact plates. The screws are fairly pointy at the end, and you don't want that poking a hole in your GPS!! So file the ends nice and flat, so that they won't poke a hole in the GPS. Then I soldered the ends of the screws, so there where balls of solder on the ends of the screw. Then file these balls of solder flat. The reason for this is that the solder is a lot softer than the steel, so the solder will make a better contact. After you've done all this try to set up the screws so they make contact with the pads. Then solder the wires to the DB9 Female connector. MadGPS provided this pinout, which worked for me!!
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use a 9 pin serial cable from a old mouse cable.On the PC part of the cable,looking at the cable pins ...


pin #2 : data out
pin #3 : data in
pin #5 : Grnd

In back of the GPS Mag315

3.8 V (+)---> O...O <---(-)Grnd
screw ..-------> o
data in ---> O..........O <--- data out


Take the screw from the mouse cable where it screws in the PC serial port.It fits perfectly in the threads of the GPS.
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