Thread: Are the Digital Inputs Active?

Originally Posted by RonS

I have a question then. Can the firmware be re-written to use the digital inputs as analog. I need two more inputs and was planning on using the digitals.

No, it's a limitation of the board, if I remember correctly. The board can only handle 13 analog inputs, and only on certain pins. I'll check when I get home.

Ok thanks. I am going to get one of the new ones when they come out anyway. For right now I can do without the air fuel.

so to use them..

what size resistor would you suggest if you wanted to use a switch?

also i guess you will need to have the digital inputs code somewhere else and copy / paste it back into the .xml file each time you open the config and change anything?

as a thought could you treat them like a plugin or 3rd party item and refere to a 2nd .xml file just for the digital inputs

I think you can get away with a very high resistance, as you're just pulling the line to a voltage, and there shouldn't be any load on that line. I'd guess a 100K ohm resistor would be sufficient. I think you want to pull the sensed line to ground with that resistor, then put a switch between the sensed line and +5v. That way the input is normally grounded unless you press the switch, which pulls the input up to 5v.

I tried a 470K resistor and it didn't work.
Nick told me to try something lower, like 470 ohms.
I'll get to that tomorrow sometime.

if you get it working can you post up a spoon feed of what you did.
as info seems to be pretty limited.

im starting to compile my own dummies getting started guide as i blunder my way thru it bit by bit,
while there is alot of info about, it seems to assume you have it running and know how to program it to a degree.

having said that i can see the guys are going flat out making it more first time user friendly, with things like ninja kitty (which i got working yay)

just a pointer to an update on this

http://www.mp3car.com/vbulletin/docu...ml#post1247202

thanks guys