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Hi, everyone! I am developing a fruit-sorter, and this device was controlled by PC. Now, I want to design a microprocessor system to execute it. About hardware, I don't want to change too much, so there is a problem I need to work out--- How to implement communication between AD convertor and my microprocessor system ? Need what kind of technologies? What about hardware? software?
What is the most important problem? 1. Getting the input signal into the 0-5V (or whatever it is) range of the A/D input. 2. Selecting an A/D that can perform conversions fast enough. Do you need 100,000 samples per second or only 10? 3. Selecting an A/D with the proper accuracy and resolution. Do you need 8-bits, 10-bits, or 12-bits of resolution? In other words, do you need 256 steps, 1024 steps, or 4096 steps from min to max. If you don't understand these things, you'll probably need to find a good analog systems designer to help you. Jon
"If you don't understand these things, you'll probably need to find a good analog systems designer to help you." Even if you do understand the question, you may still need the assistance of a good analogue systems designer: if you need a high-speed 10- or 12-bit DAC, then you need good low-noise, wideband analogue electronics - which is not a trivial design exercise. It's no good having a nice 12-bit DAC if you use grotty, noisy old 741 op-amps! ;-)
"It's no good having a nice 12-bit DAC if you use grotty, noisy old 741 op-amps! ;-) " -- or have the know-how to do proper PCB layout for grund noise prevention etc. Erik
It's no good having a nice 12-bit DAC if you use grotty, noisy old 741 op-amps! ;-) But it's FUN writing software to filter 5 or 6 bits of noise from 24-bit A/D! Jon
Jon, maybe you just need to get out a little more often? ;-)
There's no maybe to it! :-) Jon (I need a vacation) Ward