ADC and Measuring voltage difference

[fireball003]

Hi,
I didn't use ADC before. Would someone please tell me or give me a link on the concept of ADC / DAC?

How can I measure voltage difference between two or more ADC ports? Can I meassure voltage difference by programming in C?

Thank you

 

[mmohamed15]

ADC : Analog to Digital converter it is used to transform a physical voltage value to a correponding number this number dependes of what so called a reoulation for example if you have 8 bit resoultion the converted value will be between 0 and 255
DAC : Digital to analog converter the opposite of the above you give it a value it gives you a physical voltage

Can I meassure voltage difference by programming in C?

yes you can by readign the two voltage values butting them in two variable and compre them

How can I measure voltage difference between two or more ADC ports

if your microcontroller has ADC configure the ADC registers probably and read tha ADC data registe
if not use exteranl ADC them consult the data sheet

 

[Gomez]

You can simply subtract both ADC values. Some controller have also an ADC with a difference input. If your controller hasn't such an input then it's teh best to use an operational amplifier.

Gomez

 

[nagi]

hi;

The following link helps to understand the parameters associated with ADC. it is quite usefull in selecting ADC wich suites your application and it also hepls you in integrating output ADC to higher level system.

**broken link removed**

regards
nagi