I have a problem with my Project...
My Project is about to use a Keypad with my Arduino Due to select any Voltage between 2V - 4V, to get this Voltage I use my DAC0 PIN and connect it with an OP at the end.
After I finished my Code I realized that no matter which Voltage I enter it is everytime 0,01V less than it should be..
on the Internet I found a formula to calculate the right decimal number for the DAC0:
The maximum output current for both DACs is 3mA -----> Be sure to have at least 1.5 KOhms resistors in serie to avoid burning your DACs !
In no toturial someone said I need a resistor for my DAC0... :o
This is how I connected the DAC0 with the OP. So do I need a Resistor before I connect it to 1IN+?
Moreover, DAC output is within 1/6 * 3.3V and 5/6 * 3.3V:
I know this and that is the Problem.. I checked on my Arduino which numbers it exactly is and it was possible to what I need. The thing is that the Output is smaller than I expected. I wanted to have for example 0,556V but instead I get 0,546V.