Hi everybody, Well iam new to this forum and hope to get help from 'experts'here! Iam doing my Thesis on Microcontroller based Maximum Power Point Tracker for Solar PV. As iam not expert in embedded,but i know programming in 8051.In the same project i have to take voltage and current from solar panel at the same time and have to multiply(and many more operation) and also i need to have signal from the battery.For all this i need atlist 4 ADC.So i decided to use ADC0808. My question is that:can i get same instant data(voltage and current) or i get data one by one from ADC. Since the problem of external ADC will b not there if i use PIC or AVR,but i dont have idea of programming on same.So please if anybody have idea about same then please share with me. Thankx.
With such poor resolution wouldn't you be better off using a micro controller with built in A2D? This solves numerous problems not the least of which is interfacing the A2d converter to the processor.
I recommend (if you want good precision and a very inclusive part), TI's microsystem converter (focus.ti.com/.../parametricsearch.tsp).
I suggest since your doctorate will ride on this you take extreme steps to guarantee that things work correctly. I suggest going over every part of the system to ensure the data you get is accurate and you can PROVE it's accurate. This includes flow charts for your code and how the data is computed.
I don't believe an old 8bit ADC is a wise choice. You may have 2 significant digits of accuracy there. Micro system converter with ADC have 4 to 6 significant digit accuracy with built in reference etc.
Stephen