• Planned platform is Arduino NANO with Serial LCD.
• Arduino Mini is cheaper by %50 apparently…
• Important is display type- black on white is best for sunlight conditions. Backlight also required. Maybe white on blue would work well in sunlight?
• Important is character support- LARGE NUMBERS are necessary.

• X Buttons for functions Y
• Calibration mode, 1 nautical mile, 1/2 nautical mile

= Calibration method =

• For now it seems that traveling 1 mile and counting the number of transducer clicks will provide an adequate average result
• Once the number of clicks for 1 mile is found, math is 1 n. mile per hour = 1 knot, choose a very small unit of time to count clicks for to allow fast updates of speed calculation (2s?)
• Click count… need to think through the math

Arduino LCD Code notes

Arduino Graphics LCD notes

Nano sales in sweden

http://www.seetron.com

http://store.seetron.com/bpp420l-4x20-serial-lcd-with-led-bac420420.html

http://www.seetron.com/bpp440_1.htm - $140

http://www.seetron.com/bpp420_1.htm - not black on white, $59, $12 bezel kit - large numbers with punctuation

http://www.seetron.com/pdf/bpp423.pdf

→ http://www.matrixorbital.com/lk20425gw-p-11.html - blue on white, $89 for extended temp (-20C - +70C) and 9-15v range, large numbers - could be good. manual here: http://www.matrixorbital.ca/manuals/LK_series/LK204-25/LK204-25.pdf

http://www.matrixorbital.com/lcd-character-lcds-c-1_2.html

http://www.matrixorbital.com/lcd2041gw-p-71.html - black on white, $69, includes large numbers

http://www.matrixorbital.ca/manuals/LK_series/LK204-25/view?searchterm=None

http://moderndevice.com/LCD.shtml

More expensive, but viable: http://www.crystalfontz.com/products/index-ser.html

Some decent info: http://reefprojects.com/wiki/Main_Page

Sparkfun has some interesting displays, this one isn't serial, but nice looking and cheap: http://www.sparkfun.com/commerce/product_info.php?products_id=710