I am new to eMon and have built my first Arduino Pro-Mini four channel prototype … and it’s mostly working.
In this first iteration I am using an Arduino Pro-Mini with the ATMega328P at 3.3v, running at 8Mhz.
I’m curious about the following design considerations:
What are the trade-offs of using 3.3v vs 5v? I’ve read much of the learning section of the website, and the examples are given for both. I’m trying to think through the trade-offs of designing around either voltage. Obviously interfacing to other components is one issue, but in the ADC is there an advantage to basing the interfacing circuitry on 3.3v vs 5v?
What are the possible implications or issues running at 8Mhz vs 16Mhz? I’ve read a few posts that seem to touch on this subject, and do understand that it’s all about timing - and the potential unreliable timing of the utility company - but I want to understand if the 16Mhz solution would provide more accuracy or … well … I’m not sure what else?
I’m going to build a second Arduino Pro-Mini solution this afternoon, using a 5v 16Mhz version, and I"m curious what differences I would expect to see vs my current version.
Thank you again for this forum, and incredible solution!