@ Magician, thank you for your interest in my problemFor 6 DAC, it takes 3 Arduino Due, each card will manageQuestion 11) How to control the DAC through direct management of ports and increasing the frequency to 1MHz without distorting the output voltage before I amplified by an operational amplifier?Question 22a) Do you have feedback on the use of pin 34 (PWML0) and pin35 (PWMH0) taken as an example http://forum.arduino.cc/index.php?topic=325585.02b) Direct management of digital ports with delayMicroseconds (1) between Does the risk inversions generate for a moment during the 2 signals forward and backward together?
I wouldn't use more than one DUE, communication/synchronization overhead would makes simple project over complex. Put analog multiplexer at the arduino DAC output, and you will get as many DAC as you wish, with slower sampling rate, of course.
You may find an example of code to drive DAC at 1.6MHz here:http://forum.arduino.cc/index.php?topic=224672.0
My analytical mind says, it's a waste of time to try to help you. You are too far from the required level for completing such project. Start from the beginning, like everyone does, blinking led. No offence mean.
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