My mental picture of how I'm going to build a battery assembly continues to evolve, and I'm thinking of adding a low-voltage indicator. I did a bit of web searching, and found this low-voltage flasher, which isn't exactly what I want, but the IC there put me on to a search at Digikey for similar, and I found this, among other such ICs. Since I don't know anything about designing with these things, I don't know whether I can drive an LED directly (with a dropping resistor) from one of them, and what output type I would want. Seems there's lots of output types, and I suppose I should do some searching on those.
My thought is to have 2 LEDs -- one for "in operation", and one for "low voltage". I've found a few voltage plots for LiION batteries, showing V vs. % charge. They don't all agree with each other, but I'm guessing I would want a trigger voltage somewhere around 3.5. One of these "trip point" ICs looks like an easy way to get there.
Any ideas on this? Anyone build one?
My thought is to have 2 LEDs -- one for "in operation", and one for "low voltage". I've found a few voltage plots for LiION batteries, showing V vs. % charge. They don't all agree with each other, but I'm guessing I would want a trigger voltage somewhere around 3.5. One of these "trip point" ICs looks like an easy way to get there.
Any ideas on this? Anyone build one?
