这是我的另一篇电能表的完整设计，包括完整的原理图和PCB-This is my other one watt-hour meter complete design, including a complete schematic and PCB

这是我为国外设计的电能表（圆表）完整的电路图和PCB，已经交付国外，运行性能能良好，欢迎交流。-This is my design for the foreign power meter (round table) a complete schematic and PCB, have been delivered abroad, performance can be good, please share.

LC meter (ATmega32) Sources codes & Schematics ,PCB Features -Inexpensive -High acuarity -Auto scale -Auto calibration -Can be use as a frequency meter with only small modification -Measure capacitance and inductance

esr meter design and code use pic