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The Tripmate transmits the position and satellite information at 1 Hz 1 time per second , so you could use the latitude and longitude information, plug it into the Haversine formula , and have estimate of the distance traveled per second. Sorry, your blog cannot share posts by email. Will the stuff posted here allow me should I actually somehow do the project to lose the laptop, or simply to interface to it in a less? Read on to find out more information about the project, see the schematic and soure code I wrote, and find out how the data was visualized. However, the unit is dated, designed to be used with Delorme products see below for the special “init string so I have moved on to more uptodate products such as the Magellan Meridian and Explorist self contained handheld mapping units and have forgotten most of what I used to know about the Tripmate, so, if the information you seek is not on this page, it’s “Google Time” as asking me is not going to be productive. To create your own adapter, get a matching pair one male, one female of DB-9 connectors and remove pin 9 from the female connector. Here are the wires we’ll be working on.

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DeLorme Tripmate GPS Receiver

As you can see from the image, I have now made several with a variety of power connectors to meet specific needs. Check very carefully for stay strands of wire from your soldering. Read on to find out more information about the project, see the schematic and soure code I wrote, and find out how the data was visualized.

You can find it on this website: Unsolder the wire on solder pad 4 RED from the tripMate circuit board and insulate the exposed end.

The only reason I did not save speed or heading was because all I wanted was position information. I was turned onto this from the Cr-4 email. In addition to the above mod, you can rob the tiny pins from a sound blaster CD Audio cable and plug them into the nylon plug body that is hooked to the battery holder on the TripMate If you are careful with a jeweler’s screwdriver you can pry the little locking tabs up on the nylon plug body and extract the wires that are connected to the battery pack.


However, if this project is transitioned to an 18F PIC, then it would not be a problem to add the necessary code. Please only respond to my questions if you are so incline. It has been sitting in the back of my car for the past four years, so I finally decided to put it to good use. Many thanks for listening.

PIC16F88 Delorme Tripmate GPS Logger –

Any chance of selling them? Tripmage again Steven, you have other bug in the tripmatd, pin tripmaate from PIC goes to pin 2, not 11 to 1, check the pdf of max, i have spend 2 hours do discover this because i dont have pulses in bootloader comming to com port, im going to try connect to a bluetouht gps, i disable the BT and found the rs ports in pcb, but the gps send mnea commands at bps, can you change the hex for me please, or tell me what correct program to assemble your.

Get the Magazine Make: If you are really a serious minimalist as Delofme am, take delormme pair of strong scissors or metal shears and cut the anchor holes off of the metal DB-9 housing. Thanks for your submission. When the EarthMate II was finally closed out I picked one up from Frys which included the “Bluetooth Backpack” based on it’s original claim to serial options, but when I opened the package, found that the only serial option that Delorme offered was to run a serial emulator on the pc to convert usb input to serial for older software, something that’s not an option with a PocketPC or laptop without USB and a call to Delorme confirmed this serious limitation which I have found since to be incorrect.


Hi, Just found your project during a websearch for a GPS datalogger. MAKE, popular science, hackaday, engadget, fallon, braincraft A cheaper cheaper GPS logger… — Link.

TripMate Self Start Modification

A few years ago found a Qbasic routine that at least gets me back the ability to retrieve coordinates from the expletive deleted thing. Newsletter Stay inspired, keep making. This project was an attempt at making a barebones cheap gps logger that worked well. Please feel free to contact me if you have any problems.

Thanks for signing up. Although the MAX should nominally be run at 5 Volts, I have found that it works perfectly fine at 4. To create your trilmate adapter, get a matching pair one tfipmate, one female of DB-9 connectors and remove pin 9 from the female connector. The units send speed and heading information, so it would be very easy to capture that and output it to a screen, but the update rate would only be 1 Hz.

So update speed would be key here also. This was a fun experiment because not only did I need to interface the PIC16F88 to the Tripmate, but I also needed to deloorme the output and implement an efficient storage solution. Using these values will allow dflorme faster “time to first fix”. Thank you Your feedback has been received.

This site uses Akismet to reduce spam. To log data from the Tripmate, you must use a crossover cable that swaps the TX and RX serial data lines. I modified my Tripmate to self-start using a loopback modification.

Oh, how fast does the gps unit update?