Mini Power Monitor Reference Design

The Mini Power Monitor is a power meter that allows a user to accurately measure the power consumption of electric appliances. The mini power monitor uses an RL78/L13 low-power consumption LCD MCU, a dedicated energy metering chip, a high-precision current and voltage sampling circuit, and an LCD to monitor a variety of electrical parameters in electric appliances.

The device can measure the total electric energy consumption, active power, voltage, current, total elapsed time, frequency, and CO₂ emission values of the attached appliances, record this information via on-chip data flash, and display these parameters via the LCD. To prevent fires, an alarm will go off when the ambient temperature is higher than 60°C. The device can be used for home appliances such as LED lamps, air conditioners, refrigerators, microwave ovens, etc. It can also be used as a measuring instrument in teaching.