{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Mechatronics_11_25_08_Dig2Analog

Mechatronics_11_25_08_Dig2Analog - A/D and D/A details...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
A/D and D/A details Fundamentals of Mechatronics Engineering 11/25/08
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
(Pre lecture Comments) Don’t forgot about your projects over the Thanksgiving weekend. Pick your time slot for your presentation on 12/09: Sign up sheet to go around class today. Presentation: 12 to 15 minutes long Each person should speak for 2 or 3 minutes describing their role. One person will give an overview of the project. (2 minutes x 4 people+2 minute overview=10 minutes) Demonstrate project (~2 minutes) If you have a project that requires an outside demonstration, please try to cluster your projects at the end of the time slots. (write “Outside” next to your project name). If you want to demonstrate your project early, it is encouraged. Project Report DUE: Friday, 12/12 by 5:00pm, email OK.
Image of page 2
Recall the basics of A/D Samples an analog input (continuous voltage over 0-5 Volts)* The analog input gets converted to digital form, a certain number of bits. The Atmega 128 has a 10 bit A/D converter. 5 volt input=11 1111 1111=1023 0 volt input=00 0000 0000=0 Linear in between The Atmega 128 has a 10 bit A/D converter, but there are many sizes available : 8 bit, 12 bit, 16 bit, etc. You might imagine that if you take the same 0-5 volt input, and represent it as 0- 1023 (10 bit) versus 0-65,535 (16 bit), the 16 bit has much more resolution. It can represent smaller variations in the input that will be “rounded” off with the 10 bit A/D. So what is the resolution of a 10 bit A/D? 5 volts/1024=.0049 volts. This is called the quantization: Q=(Vmax-Vmin)/N, where N=2 , n=number of bits But, what does it mean as far as you accuracy? Let’s say that input was a temperature sensor with a range of 0 to 100 degC represented by 0-5 volts.
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern