Great Tutorial from TronixStuff about the reduction well known Arduino AREF Pin. First: what is resolution?
We portion fortitude in the conditions of the number of pieces of resolution. For example, a 1-bit fortitude would usually enable two (two to the power of one) values " 0 and one. A 2-bit fortitude would enable 4 (two to the power of two) values " zero, one, two and three. If you attempted to portion a 5 volt operation with a two-bit resolution, and the deliberate voltage was 4 volts, the ADC would lapse a worth of 3 " as 4 volts falls between 3.75 and 5V.
What is AREF?
AREF means A nalogue REF erence. It allows us to feed the Arduino a anxiety voltage from an outmost power supply. For example, if you wish to portion voltages with a limit operation of 3.3V, you would feed a good well-spoken 3.3V in to the AREF pin " maybe from a voltage regulator IC .Then the any step of the ADC would represent3.22 millivolts.
Read on this well minute educational around [ TronixStuff ]
This access was postedby d.gomba@arduino.cc on Monday, December 13th, 2010 and is filed beneath ADC , AREF , Coding , English , sensors , tutorials .You can follow any responses to this access by the RSS 2.0 feed.You can leave a reply , or trackback from your own site.
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