This thesis is develop to multi Function Energy Meters. Amplifier and Rectifier change Voltage DC and adjust voltage level interval 0-4.096 volt. And then singnal is converted by analog to digital converter to 10 bit data. Microprocessor computes data from analog to digital converter. The other input voltage/current signal is converter to digital by zerocrossing detector converts voltage level in order to adjust voltage level interval 0-5 volt and passes signal through Phase Comparator and adjust voltage level interval 0-4.096 volt. And then signal is converted by analog to digital converter to 10 bit data. Microprocessor computes data from analog to digital converter
By
Kittisakdi Onta
Kirk Sopongsa
Paisan Panditrakul
