So I dove headfirst in all things arduino. I've done some pretty basic projects already (LED lights, Max6675 sensor, etc). But I'm trying to tackle something that is a little harder...
I'm recreating my "door ajar" display in my 1989 Dodge Spirit turbo. When a door is open, the sensor sends 10 millivolts to a small lightbulb in the dash to light up.
I drew some simple bitmaps, saved them on a microSD, and got them to display on an Arduino Uno with a 3.5 TFTLCD utilizing MCUFRIEND_kbv
I could really use some help and direction with the following:
- Is 10 millivolts enough signal to register as a digital input on the Mega 2560?
- How do I trigger a bitmap based on that signal?
- How would I set up the "homepage" to stay on when all doors are closed?
Please forgive me if I'm using the wrong language or if these questions are rudimentary. I drank a lot of info from the proverbial firehose these past couple of days (possibly to the point of confusion).