Here’s a demo of the finished system:

In the end, it all turned out really well. Painting it white and using a white print stand was a good insight, the light reflects around the box pretty well for how few LEDs are in use.

The software flow chart has changed slightly. I removed the speaker as it wasn’t loud enough and added software debouching for the pushbutton interrupt service routine. Here’s that most recent version:

The interesting parts of the code are the cookResin function as well as the main loop of the Arduino:

void loop() {
  digitalWrite(BUTTONLED_pin, HIGH); 
  displayStaticState(0);
  if (BPRESSED == true) {
    cookResin(14400);
  }
}

void cookResin(unsigned long MAXTIMER){
  unsigned long SECTIMER = 0;
  
  writeLCDLines("CURING TIME REM:", "H:MM:SS  -:--:--");
  
  fadeLEDs(1,1);
  
  while ((SECTIMER < MAXTIMER) && (BPRESSED)) {
    digitalWrite(BUTTONLED_pin, HIGH); 

    String part0 = String("H:MM:SS  ");
    String part1 = secToHuman(MAXTIMER - SECTIMER);
    String line1 = part0 + part1;
    lcd.setCursor(0, 1);
    lcd.print(line1);

    int DMILSECTIMER = 0;
    while ((DMILSECTIMER < 10) && (BPRESSED)){
      digitalWrite(BUTTONLED_pin, HIGH); 
      Alarm.delay(100);
      //Alarm.delay(1);
      DMILSECTIMER++;
    }
    SECTIMER++;
  }
  
  if (BPRESSED == false){
    //start of cancelled cure end
    
    displayStaticState(2);
    
    fadeLEDs(0,1);
    
    
    delay(1000);
    BPRESSED = false;
    
    //end of cancelled cure end
  } else {
    //start of successful cure end
  
    displayStaticState(1);
    
    fadeLEDs(0,1);
    
    delay(1000);
    BPRESSED = false;
    
    //end of sec cure end
  }
  
  return;
  
}

Again, this all should all be explained by the flow chart. The full source can be found at the bottom of this post.

The circuit schematic hasn’t changed at all since this post, here’s a fritzing of what’s going on:

Super simple, basically a screen and a button. The parts to make this are here:

Assembly is super straight forward, if you’re trying to build one and have any questions, let me know!

Thanks for reading!

This past school year I too several classes related to 3D modeling. One class in particular, a class based around SolidWorks. I hadn’t really been able to use the software again, not having the tools to actually execute. MADE@MassChallenge really has the whole kit, 3D Printers, a 40W Laser Cutter etc. All the tools of a hackerspace as a part of my job. Here’s a “finished” model of the system:

Cure Cab Models

The frame is built out of:

• .22in thick masonite painted black on one side
• The frame is held together with a series of L brackets and machine screws from home depot
• The front opening is secured with two metal hinges from home depot

There were a couple 3D modeled components as well:

• The four feet

I ended up gluing these down with hot glue even though they have cuts for screws. In the end, it wasn’t worth it to use more screws and add more complexity.

• The electronics enclosure

View post on imgur.com

There is a frosted acrylic sheet inserted in the top. One of the goals of this project was to show off the tech, and I think this does that quite nicely.

• The knob assembly

View post on imgur.com

The knob has a stem that comes of the back and forces the hinge back, keeping the door closed. I wanted to try and keep things as simple as possible. The threads I modeled weren’t within tolerance. So I just glued the nut in place so the knob could rotate freely.

• The print stand, for holding up the prints so they cure evenly

View post on imgur.com

It doesn’t make sense to have the prints just sit on the bottom of the frame. I also cut inserts that fit the inside of the print stand. This is so resin doesn’t cure to the print stand so it can be used many times while only needing to change the cardstock inserts.

Here are some more photos of the build process:

Cure Cab Build Photos

I’ll include the plans to build this whole assembly in the final post for this project once it’s all finalized.