PWM/analog input? Hey all.  Great support here Does anyone know of sketches that allow

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1

PWM/analog input?

Hey all. Great support here
Does anyone know of sketches that allow inputs from PWM signal?

I’m using 5v PWM signals from a hobby aircraft radio control receiver.
Should I just treat the input as a regular 0-5v ADC?

What I want to do is control speeds of flashing/animations, colors/pattern selections, etc.
Eventually I want it to respond to at least 3 channels-
Throttle
Pitch
Roll

Thanks in advance!
~Blaine

2

You can use the standard Arduino function “pulseIn()” to read the width of servo pulses from your receiver. http://arduino.cc/en/Reference/pulseIn

3

Thanks Tod.
So I guess it’s a matter of finding out what range of pulse timing my Rx sends out and use it’s values to alter light patterns?

4

Exactly. Servo pulses typically range between 1000 microseconds and 2000 microseconds, with 1500 microseconds being considered middle/neutral.

So you can do something like:
void loop() {
unsigned long duration = pulseIn(receiverPin, HIGH);
if( duration > 1700 ) { // stick pushed up
leds[0] = CRGB::Green;
}
else if( duration < 1300 ) { // stick pushed down
leds[0] = CRGB::Red;
}
else { // stick in the middle
leds[0] = CRGB::Yellow;
}
FastLED.show();
}

5

I’m revisiting how arduino code works…

so “unsigned long” is the type of variable “duration” is?
pulseIn is the source of the data from a RxPin to assign to the variable?

then we use “duration” to compare in the if/else statements?

6

Maybe my PulsePosition library might help?

http://www.pjrc.com/teensy/td_libs_PulsePosition.html

7

thanks for the help.
looks like I have a lot of reading to do to figure this all out…

8

Synthetech,
Lemme know if you need help on the hardware side. New engines for interactive art is my passion!!
Steve French
Voltvision.com

9

I’ll be getting a 60 led tape w/ 2811’s on it soon to start working with and a Uno to try code on… maybe a nano too.