Project: Tempest SXR

[SXRguyinMA]

Alright crenn I need you lol. I hooked it up to test it...and the servo spins the wrong way! I can't flip it as there's not enough room. It is possible to make the servo spin the opposite way? I tried reversing the settings in the code (from 5,175 to 175, 5 for servo position) and it didn't change anything. Any ideas?

[SXRguyinMA]

ok I figured it out. I set the computer off (no voltage to pin 7) setting to 180 instead of 50 (other end of servo). Then I placed the servo arm in it's correct position so the louvers will be closed when the servo is at this position. I then swapped the map=val figures to make the servo spin the other way and set the range of motion for the servo. These readings will need to be adjusted more once I get the system up and running, so I can set the ROM for the actual temps the case sees, not just ambient or in my mouth lol

Current code:

// Controlling a servo position using a temperature sensor
// by Michal Rinott <http://people.interaction-ivrea.it/m.rinott>
// edited 5-12-2010 by Will Lyon to include base setting for servo if voltage not detected on pin 7
// edited again 7-4-2010 by crenn to simplify the code a little
// edited yet again 7-5-2010 by crenn to add features
// edited again 7-21-2010 by Will Lyon - recalibrated servo positions

#include <Servo.h>

Servo myservo;  // create servo object to control a servo

//Constants
const unsigned char CONTROL = 7;	// digital pin used to detect if the system is on or off
const unsigned char temps = 0;		// analog pin used to connect the temp sensor
const unsigned char MAX_VAL = 10;

//Main global varibles
char trigger = 0;			// varible used to store the control pin value
unsigned int val;			// variable to read the value from the analog pin

unsigned int updateAvgtemp(){
	static int history[MAX_VAL]={0};
	static unsigned char lastHist=0;
	static unsigned char numHist=0;
	unsigned int temp=0;
	unsigned char counter=0;
	unsigned char arcount=0;
	history[lastHist] = analogRead(temps);
	if(numHist<MAX_VAL)
		++numHist;
	arcount=lastHist;
	++lastHist;
	if(lastHist>=MAX_VAL)
		lastHist=0;
	temp=0;
	counter=0;
	do{
		temp+=history[arcount];
		arcount--;
		if(arcount>MAX_VAL)
			arcount=(MAX_VAL-1);
		counter++;
	}while(counter < numHist);
	return (temp/numHist);
}

void setup()
{
  pinMode (CONTROL, INPUT);		// sets the control pin to input
  myservo.attach(9);			// attaches the servo on pin 9 to the servo object
  digitalWrite(CONTROL, LOW);		// ensure internal pullup resistor is disabled.
}
void loop()
{
  trigger = digitalRead(CONTROL);	// read input of pin CONTROL  and store it
  if (trigger == HIGH){			// reads if pin CONTROL, if true, do this:
    val = updateAvgtemp();		// read the value of the temp sensor (value with range of 1024)
    val = map(val, 350, 700, 160, 80);	// scale it to use it with the servo (value between 160 and 80)
    myservo.write(val);			// sets the servo position according to the scaled value
  }
  else {
    myservo.write(180);			// sets servo position to 180 if above statment is false
  }
  delay(125);								// wait 25ms for the servo to move to it's new position and also 100ms until it gets the new value
}

I was going to get some vid, but during the servo removal process I accidentally broke one of the servo mounts, so I had to re-glue it and it's setting now. Hopefully later tonight or tomorrow I can get it all back together and get a vid of it working!

[SXRguyinMA]

Johnny Five Alive!!!

Ok well not Johnny Five, but my louvers are alive

After a little messing with the servo arm mounting, grinding down one of the servo mounts to clear the first louver, messing with the coding and a little silicone spray on the hinges, I'm happy to report it works!!!

Enjoy

[x88x]

Nice. Very smooth movement.

[msmrx57]

WHOO HOOOO!!!!! That is kewl as all get out man! rep too

[blueonblack]

Awesome!

[diluzio91]

okay... that deserves a massive + rep for pure awesomeness

[crenn]

Looking good! The easiest way to change the servo direction is this line when you're writing to the servo.

myservo.write(180-val);

It does a small amount of maths before it writes it, but not too much. But your solution works fine as well.

[Oneslowz28]

Looking Good!

[SXRguyinMA]

Nice. Very smooth movement.

Thanks! and thank crenn for the smooth movement!

WHOO HOOOO!!!!! That is kewl as all get out man! rep too

Thanks!

Awesome!

thanks

okay... that deserves a massive + rep for pure awesomeness

thank you sir!

Looking good! The easiest way to change the servo direction is this line when you're writing to the servo.

myservo.write(180-val);

It does a small amount of maths before it writes it, but not too much. But your solution works fine as well.

Thanks for the heads up

Looking Good!

thanks CJ!

and once again a HUGE thanks to crenn. without his help sorting out the coding it wouldn't be nearly what it is now