Arduino Thermometer

prusaprinters

Based on the work of Mirko Pavleski i've created this 3d printable design. The BOM remains the same, I used the Arduino Nano Every instead of an Arduino Nano, also I left out the switch for changing the display modes. The thermometer is powered by the micro USB cable from the Arduino.BOMArduino Nano Every DS18B20 Temperature Sensor50 LEDs WS2812B 144 Leds/m4.7k Ohm resistorWiringThe wiring diagram is from the original post. The LEDs actually only need to be soldered to the Arduino with 3 pins at the beginning. For the temperature sensor a 4.7k Ohm resistor is connected in parallel to the 5V data line. CADFirst I measured the LED strip (WS218B 144 LED/m) to get the right distance between the LEDs. Then I inserted the numbers and markings for 0.5°C steps. I made the cutouts so that I can print it with several colors. For this I created individual bodies and combined them as a group, so that they can be imported again as a model in the slicer.For the Arduino I just put a small box on the backside. The cables can be hidden there nicely and you can also set it up with it. The Arduino I have fixed in the box just with hot glue.PrintingPrinted this on my Hevo with 420x420x400 build space and a Palette 2S Pro attached, the numbers are orange, the strokes right at the numbers in 1°C increments are gold and the rest of the strokes are white. I also have a PEI Texure Sheet on there as well, which makes a nice surface that looks like it is powder coated.The LED strips are easy to slide in from the bottom. In the wiring, I left out the push button because I only want the mode where you can see a line in the different colors (blue to red). Also, I found an error in the program code where in the line display was not updating correctly. I fixed that and corrected the offset because the displayed temperature was slightly off. Code#include "Wire.h" // imports the wire library for talking over I2C #include <OneWire.h> #include <DallasTemperature.h> #include <Adafruit_NeoPixel.h> #define ONE_WIRE_BUS 5 OneWire oneWire(ONE_WIRE_BUS); DallasTemperature sensors(&oneWire); float Celcius=0; int buttonPin = 2; // momentary push button on pin 0 int oldButtonVal = 0; #define NUM_PIXEL 50 #define PIN 6 Adafruit_NeoPixel strip = Adafruit_NeoPixel(NUM_PIXEL, PIN, NEO_GRB + NEO_KHZ800); int nPatterns = 3; int lightPattern = 2; int out =0; int t =0; void setup() { Serial.begin(9600); //turn on serial monitor strip.begin(); clearStrip(); strip.show(); strip.setBrightness(2); pinMode(buttonPin, INPUT); digitalWrite(buttonPin, HIGH); // button pin is HIGH, so it drops to 0 if pressed sensors.begin(); } void testing(){ for(int L = 0; L<50; L++) { clearStrip(); strip.setPixelColor(L,wheel(((205+(L*3)) & 255)));//Gradient from blue (cold) to green (ok) to red (warm), first value here 205 = start color, second value here 42 = end color strip.show(); delay(100); } for(int L = 49; L>=0; L--) { clearStrip(); strip.setPixelColor(L,wheel(((205+(L*3)) & 255)));//Gradient from blue (cold) to green (ok) to red (warm), first value here 205 = start color, second value here 42 = end color strip.show(); delay(100); } delay(1000); } void dot() { sensors.requestTemperatures(); Celcius=sensors.getTempCByIndex(0)*2-1.5; int t = map(Celcius, 20, 70, 0, NUM_PIXEL); for(uint16_t L = 0; L<t; L++) { clearStrip(); strip.setPixelColor(L,wheel(((205+(L*3)) & 255))); //Gradient from blue (cold) to green (ok) to red (warm), first value here 205 = start color, second value here 42 = end color } strip.show(); //Output on strip Serial.print("The Temperature is: "); //Serial.print(Celcius); Serial.print(sensors.getTempCByIndex(0)); delay(1000); } void line() { sensors.requestTemperatures(); Celcius=sensors.getTempCByIndex(0)*2-1.75; int t = map(Celcius, 20, 70, 0, NUM_PIXEL); for(uint16_t L = 0; L<t; L++) { strip.setPixelColor(L,wheel(((205+(L*3)) & 255))); //Gradient from blue (cold) to green (ok) to red (warm), first value here 205 = start color, second value here 42 = end color } strip.show(); //Output on strip Serial.print("The Temperature is: "); //Serial.print(Celcius); Serial.print(sensors.getTempCByIndex(0)-1.75); delay(1000); clearStrip(); } void loop() { // read that stapressurete of the pushbutton value; int buttonVal = digitalRead(buttonPin); if (buttonVal == LOW && oldButtonVal == HIGH) {// button has just been pressed lightPattern = lightPattern + 1; } if (lightPattern > nPatterns) lightPattern = 1; oldButtonVal = buttonVal; switch(lightPattern) { case 1: dot(); break; case 2: line(); break; case 3: testing(); break; } } //Color wheel ################################################################ uint32_t wheel(byte WheelPos) { if(WheelPos < 85) { return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0); } else if(WheelPos < 205) { WheelPos -= 85; return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3); } else { WheelPos -= 205; return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3); } } void clearStrip(){ for(int i = 0; i < NUM_PIXEL; i++) { strip.setPixelColor(i, 0); } }