lombaig
lombaig After 2 weeks of use, the charge control IC (57b0, also known as TO4057) became damaged and shorted. From this, both sides of the red-green LED burned out. Fortunately, the other circuits remained intact. Unfortunately, I didn’t find such an IC on Banggood, but I was able to order from eBay. Instead of a dual LED, I installed two different colored LEDs and also replaced the micro USB charging connector with an intact one. The instrument works well again. It has also proven to be a microelectric development game.
lombaig Even after two years, it is very accurate and reliable. I made a car charge checker with it. It can be connected to a cigarette lighter.
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