A while back I breadboarded an ATmega328-based millivolt meter based on a design by Scullcom Hobby Electronics. It uses an LTC2400 ADC and LT1019 voltage reference, and has some nice display modes on a 16x2 LCD.
It’s a nice design so I decided to go the whole hog and fab a PCB at OSHpark, but this time using EasyEDA for the schematic capture and board design. Althoughit’s PCB design tools are relatively primative, it turned out just fine!
As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub
