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bdev:microfluidics [2020/09/27 21:40]
richard created 		bdev:microfluidics [2021/08/16 22:22] (current)
Line 1: Line 1:
 ====== Microfluidics ====== ====== Microfluidics ======
 +
 +The sketch and how the electrocaloric heat sensor works has changed. The temperature sensor circuit is based on the reprap design now.  https://reprap.org/wiki/Temperature_Sensor_v2.0
 +
 +{{ :bdev:microfluidics1.png?400 |}}
 +
 +ATX PSU 
 +
 +{{ :bdev:bom_atxpowerconnect_switch_fix_silktop.zip |}}
 +{{ :bdev:bom_washdrypcv_kill_fix_silktop.zip |}}
 +
 +
 +<code>
 +#include <Servo.h>
 +Servo myservo;  // create servo object to control a servo
 +
 +#include <Wire.h>
 +#include <SoftwareSerial.h>
 +
 +
 +#define THERMISTOR_PIN A0
 +
 +int valveservo = 11;
 +
 +int washpin = 10; 
 +int drypin = 9; 
 +int pcvpin = 6; 
 +int heatpin = 5; 
 +int turnon5vpin = 5;
 +int tempsensor = A0;
 +//int levelsensor = A1;
 +int washval = 255;
 +int dryval = 255;
 +int pcvval = 255;
 +
 +String command;
 +float currpos;
 +int fillflag = 1;
 +int levelval = 50;
 +int heatval = 50;
 +int htcnt = 0;
 +int pumpdelayct = 0;
 +int pumpdelay = 0;
 +int pumponflag = 0;
 +int levelstreamon = 0;
 +
 +
 +#define NUMTEMPS 20
 +short temptable[NUMTEMPS][2] = {
 +   {1, 841},
 +   {54, 255},
 +   {107, 209},
 +   {160, 184},
 +   {213, 166},
 +   {266, 153},
 +   {319, 142},
 +   {372, 132},
 +   {425, 124},
 +   {478, 116},
 +   {531, 108},
 +   {584, 101},
 +   {637, 93},
 +   {690, 86},
 +   {743, 78},
 +   {796, 70},
 +   {849, 61},
 +   {902, 50},
 +   {955, 34},
 +   {1008, 3}
 +};
 +
 +
 +void setup() {
 +  // put your setup code here, to run once:
 +  Serial.begin(115200);
 +  myservo.attach(valveservo);
 +  analogWrite(pcvpin, 0); 
 +  analogWrite(washpin,0);
 +  analogWrite(drypin, 0);
 +  analogWrite(heatpin, 0);
 +  analogWrite(turnon5vpin, 0);
 +  currpos = 0;
 +}
 +
 +void loop() {
 +   int rawvalue = analogRead(THERMISTOR_PIN);
 +   int celsius = read_temp();
 +   int fahrenheit = (((celsius * 9) / 5) + 32);
 +  // put your main code here, to run repeatedly:
 +   if ((celsius > levelval) and (fillflag == 0)){
 +    htcnt = htcnt + 1;
 +    if (htcnt > 10) {
 +     analogWrite(pcvpin, 255); 
 +     pumponflag = 1;
 +     delay(pumpdelay); 
 +     pumpdelayct = 0;
 +   }
 +  } 
 +  else if ((celsius < (levelval-5) and (pumponflag == 1) and (fillflag == 0))) {
 +    if (pumpdelayct == pumpdelay){
 +     analogWrite(pcvpin, 0);
 +     pumponflag = 0;
 +    }
 +    pumpdelayct = pumpdelayct + 1;
 +  }
 +   else if ((analogRead(tempsensor) > levelval)){
 +   htcnt = 0;
 +  }
 +  if (levelstreamon == 1) {
 +   Serial.println(celsius);
 +   delay(500);
 +  }
 +
 + if(Serial.available())
 + {
 +    char c = Serial.read();
 +    if (c== '\n')
 +    {
 +      currpos = parseCommand(command, currpos);
 +      command = "";
 +    }
 +    else 
 +    {
 +      command +=c;
 +    }
 + }
 + delay(30);
 +}
 +
 +float parseCommand(String com, int currpos)
 +{
 +
 +  if(com.equalsIgnoreCase("washon")){
 +    analogWrite(washpin, washval);
 +    delay(100);
 +  }  
 +  else if(com.equalsIgnoreCase("washoff")){
 +    analogWrite(washpin, 0);
 +    delay(100);
 +  }  
 +  else if(com.equalsIgnoreCase("dryon")){
 +    analogWrite(drypin, dryval);
 +    delay(100);
 +  }  
 +  else if(com.equalsIgnoreCase("dryoff")){
 +    analogWrite(drypin, 0);
 +    delay(100);
 +  } 
 +  else if(com.equalsIgnoreCase("info")){
 +    Serial.println("wash_dry_pcv_electrocaloric_kill_stepper_valve");
 +  }
 +  else if(com.equalsIgnoreCase("turnon5v")){
 +    analogWrite(turnon5vpin, 255);
 +  } 
 +  else if(com.equalsIgnoreCase("turnoff5v")){
 +    analogWrite(turnon5vpin, 0);
 +  }
 +
 +  else if(com.equalsIgnoreCase("manpcv")){
 +    fillflag = 1;
 +    analogWrite(pcvpin, 0);
 +  }
 +  else if(com.equalsIgnoreCase("feedbackpcv")){
 +    fillflag = 0;
 +  }  
 +  else if(com.equalsIgnoreCase("pcvon")){
 +    if (fillflag == 1){
 +     analogWrite(pcvpin, pcvval);
 +    }
 +  }  
 +  else if(com.equalsIgnoreCase("pcvoff")){
 +    if (fillflag == 1){
 +     analogWrite(pcvpin, 0);
 +    }
 +  }
 +
 +  else if(com.equalsIgnoreCase("levelstreamon")){
 +   levelstreamon = 1;
 +  } 
 +  else if(com.equalsIgnoreCase("levelstreamoff")){
 +   levelstreamon = 0;
 +  } 
 +  else if(com.equalsIgnoreCase("heatoff")){
 +   analogWrite(heatpin, 0);
 +  } 
 +  else if(com.equalsIgnoreCase("heaton")){
 +   analogWrite(heatpin, heatval);
 +  } 
 +  else if(com.equalsIgnoreCase("readlevel")){
 +     int rawvalue = analogRead(THERMISTOR_PIN);
 +     int celsius = read_temp();
 +     Serial.println(celsius);
 +  }
 +  
 +   else if (com.substring(0,10) == "setwashval") {
 +    washval = com.substring(11).toInt();
 +  }
 +   else if (com.substring(0,9) == "setdryval") {
 +    dryval = com.substring(10).toInt();
 +  }
 +   else if (com.substring(0,9) == "setpcvval") {
 +    pcvval = com.substring(10).toInt();
 +  }
 +   else if (com.substring(0,11) == "setlevelval") {
 +    levelval = com.substring(11).toInt();
 +  }
 +   else if (com.substring(0,7) == "heatval") {
 +    heatval = com.substring(7).toInt();
 +  }
 +  
 +  else if (com.substring(0,10) == "valveservo") {
 +    myservo.write(com.substring(com.indexOf("valveservo")+11).toInt());
 +  }
 +   return currpos;
 +}
 +
 +int read_temp()
 +{
 +   int rawtemp = analogRead(THERMISTOR_PIN);
 +   int current_celsius = 0;
 +
 +   byte i;
 +   for (i=1; i<NUMTEMPS; i++)
 +   {
 +      if (temptable[i][0] > rawtemp)
 +      {
 +         int realtemp  = temptable[i-1][1] + (rawtemp - temptable[i-1][0]) * (temptable[i][1] - temptable[i-1][1]) / (temptable[i][0] - temptable[i-1][0]);
 +
 +         if (realtemp > 255)
 +            realtemp = 255; 
 +
 +         current_celsius = realtemp;
 +
 +         break;
 +      }
 +   }
 +
 +   // Overflow: We just clamp to 0 degrees celsius
 +   if (i == NUMTEMPS)
 +   current_celsius = 0;
 +
 +   return current_celsius;
 +}
 +
 +</code>
 +
 +
  
bdev/microfluidics.1601242831.txt.gz ยท Last modified: 2021/08/16 22:21 (external edit)

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