smuel
Junior Member level 3
Hi,
I'm working on a final year project with the aim of remotely metering mains voltages and currents in a 3-phase distrobution box.
here's our setup..
step down voltages with .35VA 6V transformers, apply 2.5V offset, take 64 samples per 20ms (for 50Hz) via the ADC in an AVR ATmega16 micro, then calculate the RMS value in software and shoot it off as serial data.
My problem, is that i have found out after building a prototype that the 6V transformers dont output a sine wave, it's more like a deformed triangle wave... So this is putting our results off. Is there any way of somehow making it more of a sine wave?
thanks
Sam
I'm working on a final year project with the aim of remotely metering mains voltages and currents in a 3-phase distrobution box.
here's our setup..
step down voltages with .35VA 6V transformers, apply 2.5V offset, take 64 samples per 20ms (for 50Hz) via the ADC in an AVR ATmega16 micro, then calculate the RMS value in software and shoot it off as serial data.
My problem, is that i have found out after building a prototype that the 6V transformers dont output a sine wave, it's more like a deformed triangle wave... So this is putting our results off. Is there any way of somehow making it more of a sine wave?
thanks
Sam