nanoDLP

I think you mean DLPrinter...
I'm curious too. The module you indicated was UVM-30A. I'm curious, how do you end up getting that module into the small tipped cone?

just take out it by soldering-iron , it's simply sensor same as LED have two contact .
just not mistake polarity during action , make one side  complete  ,  then other

Last edited by DLprinter (2016-09-22 15:46:17)

If anyone wants or needs it, I modified some existing code from here. I used this same set up with the arduino, LCD shield, and ML8511 sensor, but refactored the code to be more-real time. I noticed that the static measurements weren't really useful for the way that NanoDLP wants to generate its mask, so I changed it to be a running average. The code take 6 readings off the sensor and averages them, then updates the display. When you're generating your mask, you can leave the sensor in the "box" you're measuring, and the longer it's there, the truer your average will be. The lowest consistent reading I got on my printer was a little over 2, so I dialed everything in to be within .05 of that.

I don't think it's good code (like at all), but it does work, so I hope it helps someone.

#include <LiquidCrystal.h>


//Pin assignments for SainSmart LCD Keypad Shield
LiquidCrystal lcd(8, 9, 4, 5, 6, 7); 

//Hardware pin definitions
int UVOUT = A1; //Output from the sensor
int REF_3V3 = A2; //3.3V power on the Arduino board
float UV = 0; //UV sensor reading in mW/cm2
int UVRead = 0; 
int button = A0;
int buttonRead = 0;
bool firstRun = 0;
float reading[] = {0,0,0,0,0,0};

void setup()
{
  lcd.begin(16, 2);
  Serial.begin(9600);
  pinMode(button, INPUT);
  pinMode(UVOUT, INPUT);
  pinMode(REF_3V3, INPUT);
  

  
}

void loop()
{
    int x = 0;
    while (x < 7){
    int uvLevel = averageAnalogRead(UVOUT);
    int refLevel = averageAnalogRead(REF_3V3);
  
    //Use the 3.3V power pin as a reference to get a very accurate output value from sensor
    float outputVoltage = 3.3 / refLevel * uvLevel;
    float UV = mapfloat(outputVoltage, 0.99, 2.8, 0.0, 15.0); //Convert the voltage to a UV intensity level
    reading[x] = UV;
    x++;
    }
float UVaverage = ( (reading[0] +  reading[1] +  reading[2] +  reading[3] +  reading[4] +  reading[5]) / 6);
lcd.clear();
lcd.print("UV Reading: ");
lcd.print(UVaverage);
lcd.setCursor(0, 1);
delay(1000);
x = 0;
  } 

  //Takes an average of readings on a given pin
//Returns the average
int averageAnalogRead(int pinToRead)
{
  int numberOfReadings = 75;
  unsigned int runningValue = 0; 

  for(int x = 0 ; x < numberOfReadings ; x++)
    runningValue += analogRead(pinToRead);
  runningValue /= numberOfReadings;

  return(runningValue);  
}
 
  
  float mapfloat(float x, float in_min, float in_max, float out_min, float out_max)
{
  return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
  
  

Last edited by backXslash (2016-09-26 15:33:55)

Hello to all, thanks for this useful information. I intend to do a measurements and make a mask for my DLP printer. The printer is modified mUVe 3D, Raspberry Pi 3, Arduino Mega and RAMPS. I have purchased a VEML6070 UV sensor
[https://learn.adafruit.com/adafruit-vem … t/overview]

My question is how to wire the UV sensor - Is it possible to connect the module to my Raspi or Arduino or I will need to buy another Arduino and use the module like dedicated unit? If there are a option to wire the UV sensor directly could you advice me how to do it - which pin, etc.
Thank you

Last edited by color (2017-02-28 08:44:07)

It will be great if you can copy a grid from excel or table and past in a mask grid box to generate a mask ;
255    255    255    255    255    255    255    255    255
239    239    239    239    239    239    239    239    239
223    223    223    223    223    223    223    223    223
207    207    207    207    207    207    207    207    207
191    191    191    191    191    191    191    191    191
175    175    175    175    175    175    175    175    175

In this way I think it will be ease to change values in future

I'm getting unstables values from the sensor, I can't calibrate my mask. Anyone can help me?

Yes you can use it with LED/LCD printer I'm trying to calibrate mine.
I did succeed with these UV sensor.

I'm planning to use a webcam to try a calibration maybe it will work.

Elshad,
Color has been added to the mask generator (beta version).

Windows version was used to be behind but right now, it is updated.

I am not sure about color support on mask as it could make things unpredictable for users who use lamp hour to modify intensity.
Anybody else experiencing the same issue?