تبلیغات
الکترونیک و رباتیک - مبدل آنالوگ به دیجیتال (ADC)
 
الکترونیک و رباتیک
میکرو کنترلرها فقط ولتاژهای صفر یا پنج ولت را می گیرند. حالا اگر بخواهیم با یک میکروکنترلر ولتاژ بین صفر و پنج را بخونیم، باید چه کار کنیم؟
برای مطالعه به ادامه ی مطلب مراجعه کنید.

ای دی سی (ADC) واحدی از میکرو کنترلر است که می توان به وسیله ی آن ولتاژ های بین 0 تا 5 ولت را خواند. بسته به تنظیماتی که در کدویزارد می کنیم، ای دی سی می تواند هشت بیتی یا 10 بیتی باشد. اگر هشت بیتی باشد، ولتاژ ورودی را به 2 به توان 8 یعنی 256 قسمت تقسیم می کند. یعنی ولتاژ ورودی به عددی بین 0 تا 255 نسبت داده می شود.مثلا اگر ولتاژ مرجع را 5 ولت در نظر بگیریم، و به پایه ADC میکرو 3 ولت بدهیم، عدد ای دی سی تقریبا مساوی 153 می شود.یعنی کسر سه پنجم، تقریبا مساوی صد و پنجاه و سه، دویست و پنجاه و پنجم می شود.
در ای دی سی 10 بیتی، ولتاژ ورودی به 1024 قسمت تقسیم می شود.




نوع مطلب : میکروکنترلر های ای وی آر، برنامه نویسی، 
برچسب ها :
لینک های مرتبط :
پنجشنبه 25 آبان 1396 02:22 ب.ظ
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