This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
rini:speed_log_notes [2009/04/17 06:36] ben |
rini:speed_log_notes [2009/04/17 06:50] ben |
||
---|---|---|---|
Line 1: | Line 1: | ||
====== Notes dumping place for possible Arduino speed-log ====== | ====== Notes dumping place for possible Arduino speed-log ====== | ||
- | == ALL DEPENDS on proven functionality of the speed transducer- first things first, remove transducer and test... == | + | |
+ | **ALL DEPENDS on proven functionality of the speed transducer- first things first, remove transducer and test...** | ||
* Planned platform is Arduino NANO with Serial LCD. | * Planned platform is Arduino NANO with Serial LCD. | ||
- | * Arduino Mini is cheaper by %50 apparently... | + | * Arduino Mini is cheaper by %50 apparently... but requires additional USB connection- PICAXE USB cable may be suitable. |
* 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 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. | * Important is character support- LARGE NUMBERS are necessary. | ||
Line 36: | Line 37: | ||
E.G. If we calibrate 1 n.m. at 2500 clicks (X=2500) and our sample/update period is 2 seconds (Z=2), and over that period we count 10 clicks (Y=10), then calculated speed would be (10/2500)/(2/3600) = S = 0.004 / 0.0006 = 6.67 knots. | E.G. If we calibrate 1 n.m. at 2500 clicks (X=2500) and our sample/update period is 2 seconds (Z=2), and over that period we count 10 clicks (Y=10), then calculated speed would be (10/2500)/(2/3600) = S = 0.004 / 0.0006 = 6.67 knots. | ||
+ | |||
+ | Hopefully we get faster turn rates that 5 rotations per second, otherwise it won't be very precise. | ||
</blockquote> | </blockquote> | ||
+ | |||