3 light battery indicator

[Hackerbilly]

Hello Modretro,
I currently need abit of help (that's usually what I post when I'm on here : oP)
But so I have been thinking off and on about building a Prop Replica of the Gameboy Horror from Luigi's Mansion. Now I wanted to incorporate the Boo Indicator on it and the only way I figured how was as a Battery Life Indicator..... My problem.. I don't exactly know how to build one.. Or at Least 1 that can switch between 3 leds. Okay so I want it to work sort of like this,
Blue- Full Battery
Yellow- Eh about halfway Dead
Red- Dying
Does anyone know a way to make one of those that'd work with a GameBoy Color? I don't really have a multimeter or anything like that.. So if someone can make a schymatic or anything for me.. That'd be great.
Now I know I shouldn't ask for stuff like this nor should I expect things to just be handed to me... But I mean it'd be really great if someone could post on how to do this or send me a link or something.
Thank you for your time Modretro and please ever do try to help me with this.

Sincerely, HackerBilly

 

[Hackerbilly]

Anyone?

 

[Fluxedo]

I wouldn't think this would be doable in such a limited space such as the GBC. Would say just have a color chaning LED hooked up to a switch.

 

[Prog]

I'm no expert on the subject, but couldn't one do this with a microcontroller with an analog comparator (IE an ATmega) connected to the LED? And then set it to change color as voltage dropped?

 

[Hackerbilly]

Ummm Maybe.... Sorry for not ever replying or being late with my replies. I haven't had wifi for a while nor cable.....
But I'm not really an expert on programming or anything..... I just wish I kind of had something small that I could at least like put in it for just a color changing light