Hi everyone, I've been working on a power meter for a long time, and its the finishing step.
A problem arises when load above 1A are not accurate. below 1A, everything is measure nice and clean.
I am using Atmega644p and the analog front end is a 0.1 resistor 15W connected at the neutral to an isolation transformer to a 4th order LPF then to myMCU to measure and calculate data.
Could it be the isolation 1:1 transformer? i cant find any rating on it.
A problem arises when load above 1A are not accurate. below 1A, everything is measure nice and clean.
I am using Atmega644p and the analog front end is a 0.1 resistor 15W connected at the neutral to an isolation transformer to a 4th order LPF then to myMCU to measure and calculate data.
Could it be the isolation 1:1 transformer? i cant find any rating on it.
