1 x 2K2 Resistor
2 x 4K7 Resistor
1 x 10K Resistor
1 x 2N222A NPN transistor
1 x USGloblSat EM-406A GPS module
1 x USGloblSat header cable (Got both of these items from from Starlite-intl) otherwise you can get them here if you live in Australia.
1 x Hammond Miniature ABS enclosure P/N: 1551RFLBK or 1551RK
1 x Nikon 10 pin connector DIY cable (Got mine from Stellardesign on ebay)
1 x Hot shoe (pc sync port) adapter
1 x Veroboard
1 x length of ribbon cable. had some lying around.
1 x heat shrink tubing, small ones. had some lying around
1 x 40 way header pin
- soldering iron
- wire cutters
- Power supply
I tested the circuit design on my breadboard and made sure that it was working correctly before building it on veroboard. Once the red LED starts blinking you are in business.
To simplify the build I laid it all out on graph paper before soldering anything. I worked out exactly where all the components, links and cuts had to be. I also measured and cut the veroboard to size so that it fits into the case. I also notched out on diagonal corners so that the veroboard fitted around the column where the top lid screwed into.
Once I am happy that everything fitted correctly then I start soldering the components together. Double checked everything has been done correctly and when you are confident that all is 100%. You can plug the 10 pin connector into the D700 and you should start seeing the GPS symbol blinking on the top panel.
Veroboard with the level converter circuitry, Nikon 10 pin connector and the 2.5mm stereo jack all wired up. Ready to be mounted into the case.
Close up of the 2.5mm Stereo jack and Nikon 10 pin connector. I also made sure that all soldered wires were heat shrunk to eliminate any short circuits.
Connect the following wires on the 2.5mm stereo socket to the Nikon 10 pin connector.
- Red wire - auto-focus - Pin 9
- Orange wire - shutter release - Pin 4
- Yellow wire - ground - Pin 6
Close-up of the level converter circuitry. It converts the 3.2V signal from the GPS to 5V for the Nikon D700.
Hole drilled for the 2.5mm stereo jack. Required for remote shutter release. Do the drilling at the lowest possible torque.
Removed pcb support as it gives extra clearance (height) so the GPS module can fit in. I used the Hammond Miniature ABS enclosure P/N: 1551RFLBK, you should get the one without the flange 1551RBK!
Cable strain relief for Nikon 10 pin connector. I used my dremel to ensure a snug fit. Take your time.
All snugly packed into the case. This is where I plugged it into the D700 for the final test before screwing the lid on.
I wanted to have the GPS unit mounted on top of D700. To achieve this I bought a hot shoe adapter off ebay.
The plan is to cannibalise it just for the base. I made sure that it could be pulled apart before I bought it. It involves removing 2 screws which takes less than 10 seconds.
I cut a piece of scrap veroboard, using my dremel, and glued it onto the hot shoe to make a platform. I can now use glue, velcro or double-sided tape to attach the hot shoe base onto the GPS case.
Check-out part 1 of DIY GPS Project.