关键词: comparator, low battery, LED, low cost, low power consumption, comparators
Abstract: This application note presents a circuit that uses a low-power CMOS comparator to provide an LED visual indication of a low-battery condition. This LBO (low-battery-indicator) is achieved by pulsing the LED at a low frequency and low duty cycle. The circuit accomplishes this without draining excessive battery current that can lead to permanent battery damage and, ultimately, hazardous waste disposal. This circuit also helps conserve battery current in the off cycle by placing the comparator in shutdown. Equations and circuit analysis are included for determining duty cycle and comparator trip points.
Low-Battery Indicator Is Low Cost, Highly Efficient, and Environmentally Friendly.pdf 
STM32
MCU
通讯及无线技术
物联网技术
电子DIY
板卡试用
基础知识
软件与操作系统
我爱生活
小e食堂