Electronics > Projects, Designs, and Technical Stuff
14.4V ground reference for ADC
<< < (10/33) > >>
Simon:
Well you can still do the current limit my way just use a low pass filtereid PWM to set the threshold voltage. I fact you can also do the same to the mosfet you are controlling to control the voltage setting or your DAC. But like I say you just want to get going so keep it simple first.
Arjunan M R:

--- Quote from: Simon on May 20, 2019, 07:41:47 am ---Well you can still do the current limit my way just use a low pass filtereid PWM to set the threshold voltage. I fact you can also do the same to the mosfet you are controlling to control the voltage setting or your DAC. But like I say you just want to get going so keep it simple first.

--- End quote ---
I don't want to go in trouble finding the value of the capacitor and resistor and the pwm frequency of the MCU. I will stick with DAC . It will be much more simpler for me.
Simon:

--- Quote from: Arjunan M R on May 20, 2019, 09:09:54 am ---
I don't want to go in trouble finding the value of the capacitor and resistor and the pwm frequency of the MCU. I will stick with DAC . It will be much more simpler for me.


--- End quote ---

If you can't do that then you are wasting your time with electronics, it's a free DAC and you are budget constrained yet you are using all of the over the top expensive solutions. What you want to do is feasible provided you do not put anything digihal in a regulation feedback loop. Current limiting you may get away with but there will be a delay.
Arjunan M R:

--- Quote from: Simon on May 20, 2019, 11:41:27 am ---
--- Quote from: Arjunan M R on May 20, 2019, 09:09:54 am ---
I don't want to go in trouble finding the value of the capacitor and resistor and the pwm frequency of the MCU. I will stick with DAC . It will be much more simpler for me.


--- End quote ---

If you can't do that then you are wasting your time with electronics, it's a free DAC and you are budget constrained yet you are using all of the over the top expensive solutions. What you want to do is feasible provided you do not put anything digihal in a regulation feedback loop. Current limiting you may get away with but there will be a delay.

--- End quote ---
I can use a PWM but is there any advatage over a DAC (because i already ordered it |O |O |O |O |O )
Mainly i am concerned with PWM because i don't have a scope to see the output of the DAC  .So if any issues were found  :-BROKE i can't fix it thats why i said i will stick with DAC. What delay are you talking about.The DAC is just setting the voltage at the inverting input of the opamp. The DAC's output will only change when we set the current. It doesnt  change when the max. current limit is reached.When the max current limit is reached the output of the current limit opamp will go high and the mosfet will turn on and it will pull the set pin to ground.The DAC is not in the feedback loop.So i don't expect any delay.
 

This is the feedback loop i think
Arjunan M R:
Then how is the DAC on the feedback loop  :o
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod