![]() I hope I’m clear enough with my question, I’m just starting with electronic circuits. The green Battery indicator turns amber when the charge level is low (<20 remaining). Is this correct? How could I implement it? I was thinking about maybe using a capacitor, so it would need to be “filled up” before the LED can be lit, not allowing it to turn on with just a quick pulse. How can I achieve this with as few components as possible? The LoBat low battery indicator circuit is designed for use in electric guitars and basses with active pickups and electronics that use 9 volt batteries. I would like to modify the circuit so the LED only turns on when the voltage remains at, or below, 3.75v for longer than 5 seconds. Vector illustration smart phone charge with low battery indicator - Phone low. My problem is that when I use the camera it draws enough power from the battery to lower the voltage under the LED threshold for a very short time, so it blinks once quickly, each time I shoot it. Browse 9694 incredible Low Battery vectors, icons, clipart graphics. The circuit lights up the LED when the battery hits around 3.75v (which is what I intend), indicating that the battery is low and it should be recharged. The camera draws power only in very short intervals (about 2-2.5s) each times it fires, the rest of the time it consumes basically nothing. ![]() In such a case skip diodes D1, D2 and D3 and add one resistor R5 as a part of voltage divider to R1. ![]() ![]() I’m currently using the circuit pictured bellow as a low battery indicator for a LiPo battery, which powers a vintage film camera. Described, low battery level indicator can be used for any battery with voltage more than 2.5V. ![]()
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