Greetings,
I have recently received an Electronic Load Kit from eBay, very standard stuff as eBay electronic loads go. But, in the past few days i have been trying to design an arduino centered controler with en external precision ADC and DAC mounted on a custom-build-pcb aruino mega. it is a big project all-around, and as it is still at its infant stages, any ideas are free to be as "destructive" as they need to be.
The features i want to implement are the following:
- Temprature Monitoring.
- Fan speed control.
- Interfacing and Data-logging.
- Precise Voltage and Current measurment.
- Software controled CV,CP,CR Modes.
- Varius safety features.
Before i describe my problem, i need to point out that
i am a beginer, and i need to be treated as such. (google has allready filled my mind with fancy electronic terms and words that i do not understand, i feel like i had enough

).
My problem lies in the voltage and current measurment area. I want the load to receive voltages up to 30-40 Volts and perhaps 10 Amps (unlikely, i know).
I do not want to simply linearly scale the input to the ADC, as i feel it is "lazy" and lowers the resolution.
I have found and article named
"Optimize High-Voltage Measurements with Self-Adjusting Attenuator", and the
Self-Adjusting Attenuatorimmediately cought my attention, as it seems to be everything i need.
link to article:
https://www.electronicdesign.com/technologies/test-measurement/article/21801410/optimize-highvoltage-measurements-with-selfadjusting-attenuatorAllas, i have been googling the word Attenuator for the whole evening and i get nothing.
I have though about replicating the schematic, but the voltages and currents seem (to my undestanding) too much for the comparators, and the OpAmps. Wouldnt they just break? . And wouldnt such a design affect the current measurment ? (or the current measurment, would affect the voltage ?)
Pplus, all this talk about the impedance of the load completely goes over my head.)
So, to conclude. Is the self-adjusting attenuator a good idea? Is there any other good and reliable way to
accurately measure voltage and current?
Thanks for you time.
Have a good day.