This is a battery capacity indicator for 3.7V lithium ion batteries, using a bi-color LED (red-green) common anode.
When the battery is from 100% to 50%, the LED stays green. When the capacity is from 50% to 20%, both LEDs turn on so it shows as yellow. When battery drops below 20% the green LED turns off leaving the red LED turned on.
It uses a schmitt trigger for both LEDs to prevent bounc...
Our website uses essential cookies to help us ensure that it is working as expected, and uses optional analytics cookies to offer you a better browsing experience. To find out more, read our Cookie Notice