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GPS Guidance System — Parallax Forums

GPS Guidance System

TMAC1TMAC1 Posts: 24
edited 2012-12-18 10:34 in Robotics
I'm currently working on a GPS datalogger that I'm modifying into a gps guidance system (it displays the direction from the current coordinates to the coordinates entered with the matrix keypad). It uses a PMB-688 GPS module, 2 paralleled 9V batteries, a 4x4 matrix keypad, 2x16 Backlit LCD display, and a homemade direction-displaying module consisting of 7 LEDs driven by a 74HC595N serial-to-parallel shift register. I hope to enter it into the Hack the Halls contest.
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Comments

  • TMAC1TMAC1 Posts: 24
    edited 2012-12-09 05:44
    I now have the schematic drawn up for the LED module, and hope to complete the actual board by the end of the day
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  • TMAC1TMAC1 Posts: 24
    edited 2012-12-17 05:42
    For the Christmas season, it's going to be programmed to lead it users (the three Wisemen) to Bethlehem so they can visit the Baby Jesus. I also have some updated photos of the device too!
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  • sylvie369sylvie369 Posts: 1,622
    edited 2012-12-18 04:00
    Looks very cool, and oddly practical (or at least I imagine that wise men might find it so).
  • ercoerco Posts: 20,256
    edited 2012-12-18 06:57
    Sweet! Is that a 3 to 8 line decoder driving your directional LEDs? I used one in a 7-LED display, for only one LED on or all off.
  • TMAC1TMAC1 Posts: 24
    edited 2012-12-18 10:34
    sure is, it saves having to use eight pins just for the leds (considering that another eight are used for the keypad)
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