The Power Frequency Monitor (PFM) is a MicroChip dsPIC30F3012 micro controller based device used for high resolution measurement of AC power frequency. The Power Frequency Monitor communicates easily with a computer using a RS232 interface. PHzMon – Power Line... Electronics Projects, dsPIC30F3012 rs232 interface power frequency monitor "dspic projects, microchip projects, microcontroller projects, " Date 2019/08/02