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== ADC: Analog to Digital Converter ==
 
== ADC: Analog to Digital Converter ==
  
This device takes an analog input and converts it to a digital value. There are a huge variety of ADCs available. Types vary by:
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There are a huge variety of ADCs available.
* Number of bits of resolution.
 
* Span of voltage from lowest to highest, and various methods of adjusting this.
 
* Speed of conversion.
 
* Method of conversion.
 
* Method of reading data from the ADC.  
 
  
If you need 10 bits or less of resolution, counter-intuitively,
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If you need 10 bits or less of resolution,
it costs less to buy an ADC plus a microcontroller on one chip than to buy a stand-alone ADC.
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counter-intuitively,
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it costs less to buy an ADC plus a microcontroller on one chip
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than to buy a stand-alone ADC.
  
 
* ATTINY13V -- lowest-price chip I know of with at least one 10 bit ADC
 
* ATTINY13V -- lowest-price chip I know of with at least one 10 bit ADC

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