Grinkevich Photography

I decided to make my own GPS for my Nikon D90.  Nikon wants well over $200 for a GPS unit.  The parts I used cost roughly $40 in total, much less expensive than Nikon’s solution.  The D90 accessory plug outputs +5V and expects 5V TTL logic.  I was able to output +3.3V logic from my […]

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