so I'm fascinated now by the Arduino project stuff and I want to have it display various environment factors on an LCD in my car.
I think it'd be better to start with what I want it to do in my car: A. drive a graphical (preferably graphical) LCD such as those found on Adafruit's store. B. report on the LCD the air conditioning (A/C) temperature C. report map/compass orientation on LCD D. report altitude (I think I'd need a GPS or barometer chip, correct?) on LCD E. report outside temperature on LCD F. report the angles the car is currently at (I could use a gyro for this I think) which I think would be cool to have like aircraft have (again, on LCD) G. drive a ShiftBrite multicolor LED module
so here are my questions:
- what does the Arduino do when it loses power? I can't be supplying the Arduino with power 24/7/365 of course, so does the Arduino do fine at a sudden loss of power or does it 'prefer' to go through a regular shut down process each time? (this is important so I know how to wire up the Arduino to power)
- can a single Arduino do all those functions (of A through G)? or do I need to get two for this whole setup? I don't know how much input it can take and how much power it can supply to all that stuff
- what would be the best way to change the LED's brightness and/or color through the Arduino when it's in the car? is a rotary encoder what I need for that? would that allow me to just scroll/turn the encoder to cycle through all the color combinations I have programmed?
- is a GPS (based on the SIRF III specifically) or barometer better for altitude? I think it'd be neat to know that while driving!
so what do you all think? I'm not concerned a whole lot about budget, because I really want to dedicate a lot of time and resources to using this awesome platform if possible, so if you guys have other ideas post them and I'll see. :)