squid08:
WizenedEE:
You're using a lot of words like "inject" and "ramp" which don't make a lot of sense, so let's try to be clear: the map function takes several arguments, does some math, and returns a value.Second, you're saying you want to make a button output a voltage, which doesn't make sense either -- buttons are inputs.
So what I think you mean:
You want to make a project that reads a button and outputs a voltage if the button is pressed (if it's not pressed, output 0 volts). The voltage depends on how long the button has been pressed; increasing as it has been held longer.If that's so, you'll want to make it so that when the button was not pressed last time but was pressed this time, it resets a clock (or sets a variable to now). Then you want to map the elapsed time (now - the stored time) into a voltage that you feed to analogWrite.
now can be figured out using the millis() command. You can use a variable declared as
staticto keep a variable (such as the time when the button was first pressed) between iterations of a loop. The rest I think you know how to do.Sorry, it's hard to type as it makes sense in my head XD
Ultimately I am sending signals to a robot controller and using a on/off switch to control a motor. I am using the adjustable map values to vary my maximum power and the "ramp" to have a smooth motor application. I know it sounds like a complicated effort, but its all for good reason.so to sum up,
I want to make a project which reads a button digitally, and outputs a "progressive" voltage.
In order to output to analog we have to map it, so a button LOW = 0 HIGH = 255 (or whatever number I choose)
But instead of it being just 0 or 255, I would like it to climb from 0 to 255 over a set period of time or loops. You could call it ramp, fade, etc.Is this any clearer? Sorry for the confusion.
That's about what I guessed. Try implementing what I described in the last two paragraphs of my post and come back with questions about how to do so