Variable Range Sprinkler
Wednesday, September 23, 2009
[Pete], a musician, and the guy behind SparkFun’s pogobeds and locking footprints has a sprinkler hack. He wanted to keep his dog, Choppy, happy with a green lawn while also keeping his sidewalk water free. To solve this problem, he hacked his sprinkler and hose to adjust the sprinkler’s range. He uses an Arduino to read a potentiometer signifying the direction that the sprinkler is facing and a servo to adjust a hose valve that controls the sprinkler’s water flow. Be sure to check out the video above to see it in action.
2 komentar:
Agreed. kilo means 1000. Never should have misused it in the first place. This correction is long overdue. Same with ditching our backwards measurements system. (i’m in the US)Uhh, no…. 1KB is 1024 bytes in the real worldBase 10 is fake math? Count your fingers or toes and get back to me.The vaunted metric system (or SI) says kilo is 1000. there’s no getting around it. Use kibibytes if you want to split hairs.
By calculating the drive size this way it will help remove the confusion end users have with drive sizing. Albeit the better idea would be for drive manufactures to count the correct way.It’s the difference between kilobytes and kibibytes. It sucks, it industry shit, but – its correct.This is a total bogus argument. The “k” prefix means 1000 according to the International System (SI). If in the past computer scientists used it as shortcut to approxymate 2^10 is just a historical issue, and should only keep on living within the boundaries of such community, the normal computer user is not supposed to belong to.
Using “k” was also fine because the approximation error was limited (2.4%), but increases with larger units (4.8% with “M”, 7.3% with “G”, 10% with “T”) that were seen as astronomical in the past.
2^10 is not even a base 2 notation, 1000000000b is, so even that argument is not logical.
On top of that, multi-level FLASH stores 4 states per cell, should we use “base 4″ for measuring its capacity?
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