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  • How to modify analog output range of Arduino Due over 1 year ago

    Thanks for reply Giovanni,
    I would like to reach at least 10KHz. That would be very nice result compared to my current results which is 1-Miliseconds. Could you please give me some tips what I could apply to my setup to reach 5-10Khz almost 0.1 miliseconds ...if I am correct.

    Thanks in advance

  • How to modify analog output range of Arduino Due over 1 year ago

    Hello Giovanni, thank you so much for updating the schematics. I'm building a PID controller with Arduino Due revision 3.0. In my experiments with setpoint and input value, I get about 1-milisecond response time, it means when the setpoint changes the system needs at least a 1 miliseconds to equilibrate. Do you think with Due it is possible to reach even faster response times???. Let's say microseconds? etc.....

  • How to modify analog output range of Arduino Due over 1 year ago

    Hello Giovanni, hope your'e enjoying holidays..
    I was analysing the Due Bipolar Dac output brojet on you website. I was trying to build the same, but it looks like the main schematics is too small, so it is very hard to read it... Any chance you could send me a picture of schematics of the circuit (figure 7, the complete circuit scheme), with better resoltuon. My email zombie22333@gmail.com. THank you in advance

    Merry Christmas

  • How to modify analog output range of Arduino Due over 1 year ago

    the analog signal is a tiny microsystem, consisting of resistive bridge acting as heaters, and a thermocouples. The heaters aka resistors are connected to DAC's and thermcouple to analog input of the Arduino Due. So when running the PID control it reads the thermocouple and outputs calculated value on DACs, which tells heaters how much they should heat in form of voltage. Cant understand why there is this offset on Due DACs. it seems to be quite faulty. Could you please send me a link or some info how to build that preamplifier? you mentioned above.

  • How to modify analog output range of Arduino Due over 1 year ago

    i have found the project on your Blog. That is exactly what i need. By the way the bipolar ADC (input), in your schematics, would it be possible to read some microVolts range signals?

  • How to modify analog output range of Arduino Due over 1 year ago

    Hello Giovanni, is there any chance with additinal power supply unit to achieve 0.0 miliVolts on DAC outputs?. On my setup it DAC = { 43,55mV } when analogWrite(0), and 3,3 Volts when analogWrite(255). Any ideas how one can get rid of that 43 milivolts?

  • How to modify analog output range of Arduino Due over 1 year ago

    the problem I have is the following, I have a sensor which works in let's say 0-4 Volts range. 4 Volt is peak, and should not be exceeded. If i want to use a PID, and set the setpoint, it measures the difference and then compensates the voltage on output value, but in case of Due, or any other Arduino you cant have any value, because either it is logic high 3.3 Volts, or zero. Not considering the PWM... but in PID you basically vary the range all the time... correct me if i miss something please..

  • How to modify analog output range of Arduino Due over 1 year ago

    Thanks for reply Giovanni, i want to use DAC's to control the setpoint and measured value, lets say something like a PID controller, so I will be needing the DAC's (output) to compensate the PID values. Depending on your schematics above, would it be possible to connect the DAC output to the circuit input as you mentioned in schematics and then change the mentioned resistance values, to have a range 0-4 Volts? with a minimum value of 4/4096=0.00097 Volts....

  • How to modify analog output range of Arduino Due over 1 year ago

    Great Article, thanks for sharing some good knowledge. Currently setting up Arduino Due for a Lab project, and would like to ask you couple of questions. I need both DAC's on Due to be able to output a voltage from 0- max 4 Volts. Could you please specify if your circuitry will come in handy? and if yes, what should be changed to make that available.

    David

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