Published August 29, 2017 © GPL3+

Useless Box

I decided to make this useless machine as a gift for my little nephew. I had a lot of fun making it and he really liked it.

IntermediateFull instructions provided22 hours3,719

Story

I decided to make this useless machine as a gift for my little nephew. I had a lot of fun making it and he really liked it. It took about 22 hours to make and if you would like to make one too then here goes:

Materials:

glue stick

2 x 3mm MDF (mine were 305mm x 305mm MDF sheets)

wood glue

200-300 lollipop sticks

2 hinges

8 M3 bolts and nuts

2 x Futaba S3003 servos

hot glue

toggle switch

power bank

ON/OFF switch

Arduino mini (or wannabe in my case)

10K resistor

wire

heat shrink

plush toy

vlecro

black felt sheet

acrylic paint

spray lacquer

Tools:

jigsaw (+modelling jigsaw)

sander

mitre block + hacksaw

small chisel

files

clamps

drill

screwdriver

hot glue gun

scissors

needle + thread

Step 1: Cutting

1 / 6

First of all I made a cardboard prototype, just to see how everything would fit together. Following this I proceeded to create a template for the box and arms. Feel free to skip this and just print out the template I provided.

Attach the template to the MDF sheets with a glue stick and cut out the pieces with a jigsaw. Sand the sides of the box and glue it together with wood glue. Sand again once dried.

Step 2: Lollipop Lollipop . .

1 / 6

Take a bunch of lollipop sticks, place them into a mitre block and cut off the ends. Apply wood glue to the bottom of the box and start placing the lollipop sticks tightly next to each other, just like you see in the photos. Let it dry. In the meantime you can carry on with the top of the box in a same way. Once fully dry, cut off the edges with a hacksaw.

Step 3: And More Lollipop

1 / 6

Cut a bunch of lollipop sticks at an angle in the mitre block for the corners and carry on attaching the sticks around the box. Glue one row of sticks on the sides of the top part of the box. Let it dry.

Once dried remove the excess sides of the sticks with a small chisel and sand the box.

Step 4: Hinges

1 / 6

Mark the position of the hinges and cut the gaps with a jigsaw. Close the box and put the hinges in their places. Use clamps to keep the box shut and drill holes for the hinges. Clean the holes.

If your bolts are too long like mine, shorten them with a junior hacksaw and file them afterwards. Place the bolts into the holes and tighten the nuts.

Step 5: More Gluing and Sanding

1 / 4

Join the two arm and hand pieces together with wood glue.Once dried sand them over and glue together. Find a central position for the toggle switch, drill a hole and screw the switch in. Sand again all of the pieces including the box with a fine grit sandpaper.

Step 6: Servo Time

1 / 6

Drill a hole in the arm and door opener and attach the servo disks with hot glue. Place the servos into the MDF holders and glue them in. Glue the holders together with the spacer just like you see in the photos.

Screw the arm and door opener into the servos. Position the whole construction in the box and glue.

Step 7: Power

1 / 6

Remove the top and insides of the power bank and mark the position for the USB cable hole. Using a ruler transfer the measurements to the outside of the box. Drill a couple of holes in the marked position and file until you can fit the USB cable in comfortably.

Drill and file another hole for the ON/OFF switch.

Step 8: Arduino

Upload the code to your Arduino mini using the CH340G USB to Serial adapter.

I'm not very good at coding so I borrowed and adjusted the code from Riachi(thank you ;) ).

Step 9: Connecting It All Together

1 / 6

Solder two wires onto the ON/OFF switch and push it in its place. Apply heatshrink to all of the solder joints as you go. Solder one of the switch wires onto the positive battery line (should be marked on the power bank PCB, if not find out with a multimeter) and the second to the Arduino VCC pin. Solder another wire onto the negative battery line and Arduino GND.

Attach another two wires onto the toggle switch and solder one of them to the Arduino VCC. Join the end of second with a 10K resistor and another wire going to the Arduino pin 2. Attach another wire to the end of the resistor and Arduino GND.

Both servos are powered from the Arduino itself, so strip and solder the positive to the VCC pin and negative to the GND pin. The arm servo signal wire is connected to the pin 10 and door servo to the pin 9 on the Arduino.

Now would be a good time to test everything and make sure the code doesn't need adjusting.

Tidy the wires around the box and glue them in place. I wanted to paint over the Arduino so I placed a piece of transparent sheet over and glued it in.

Step 10: Tiger Surgery

1 / 5

Take your plush toy and detach the limbs. Remove the stuffing. My plush toy was one of those microwavable toys so I only had to remove the stuffing from the limbs. Join the two arms together into one longer "sausage".

Step 11:

1 / 6

Pull the fluffy cover over the arm and add some stuffing to make it look a little more natural. Stitch the bottom shut. Do the same for the door opener.

Later on I decided to make use of the tale and sewed it over the top of the door opener.

Step 12:

1 / 5

Stitch the limb holes shut. Saw a piece of velcro to the animals head and glue the other piece onto the top part of the box.

Attach the bottom part of the plush toys body to the bottom of the box with hot glue.

Step 13: Anti-scratch

1 / 3

Apply a layer of wood glue onto the bottom of the box and attach a sheet of felt. Cut around it.

Step 14: Painting

1 / 3

Cover the animal in cling film to prevent any accidents while painting. Paint the inside of the box with a black acrylic paint.

Step 15: Finishing

1 / 5

Find a few easy to paint pictures online, print them out and transfer them onto the box with a carbon paper.

Colour in with acrylic paint. Start with larger areas and finish with small details. Once the paint has dried spray the box with a lacquer.

Step 16: Final Thoughts

1 / 3

Something I didn't realise before I started is that the power bank that was originally designed for a mobile phone has an overcharging protection circuit. Meaning when I leave the box for a few minutes switched on without pressing the button it will shut itself down completely. I would then have to press the ON/OFF switch to reset the circuit in order to bring the box back to life. Even though this could be a little annoying for my nephew I quite like it. There will be plenty of times when he won't be playing with it and I doubt anybody will remember to turn it off when not in use.

Schematics

Code

useless_machine.ino

//based on https://www.instructables.com/id/How-to-build-another-useless-machine-easy-to-make-/

#include <Servo.h> 
Servo doorServo;
Servo handServo;

int switch_pin = 2;               //set switch on pin 2

//motor variables
int motorThrottle=11;
int motorDirection = 13;
int motorBrake=8;

//Distance Variables
int motionPin = 0;    //motion sensor pin on analog 0
int lastDist = 0;      //to remember last distance
int currentDist = 0;   
int thresh = 100;      //Threshold for Movement


int pos = 0;
int selectedMove = 0;             //move selector
int Testmove = 0;                 //test mode: set to move number to test only one selected move 
                                  //(set to Zero to run normally i.e: roundrobbin on amm moves)



void setup()
{
  Serial.begin(9600);
  pinMode(switch_pin, INPUT);
  doorServo.attach(9);           //set door servo on Pin 9 pwm
  handServo.attach(10);          //set hand servo on Pin 10 pwm
  doorServo.write(80);           //set door to hiding position 
  handServo.write(0);            //set hand to hiding position
  //Setup Channel B, since Channel A is reserved by door and hand servos and can't ber used at same time
  pinMode(motorDirection, OUTPUT); //Initiates Motor Channel B pin
  pinMode(motorBrake, OUTPUT); //Initiates Brake Channel B pin
  
}


void loop()
{
if (Testmove != 0) {
selectedMove = Testmove;
}
  
  //if the switch is on, then move door and hand to switch it off...
  if(digitalRead(switch_pin) == HIGH)
  {
    
  if (selectedMove > 10) { selectedMove = 0; } //when all moves are played, repeat the moves from beginning 
  
  if (selectedMove == 0) { switchoff(); }
  else if (selectedMove == 1) { switchoff(); }   
  else if (selectedMove == 2) { switchoffbitaraddod(); }
  else if (selectedMove == 3) { crazydoor(); }
  else if (selectedMove == 4) { crazyslow(); }
  else if (selectedMove == 5) { m7anika7anika(); }
  else if (selectedMove == 6) { m3alla2(); }
  else if (selectedMove == 7) { switchoff(); }
  else if (selectedMove == 8) { matrix(); }
  else if (selectedMove == 9) { sneak(); }
  else if (selectedMove == 10) { zee7(); }
   
  if (Testmove == 0) {
  selectedMove++;         //swith to next move if not in test mode
  }

}
}



// Library of moves

    // basic move 1
   void switchoff() 
   {    
   //Moving door
    for(pos = 80; pos < 155; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
   
    //Moving hand
    for(pos = 0; pos < 180; pos += 4)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }  
    
    //hiding hand
    for(pos = 180; pos>=0; pos-=4)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    } 
      
    //hiding door
    for(pos = 155; pos>=80; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(25);                      
    } 
   } 

   
   // move 2: open and wait, then move hand and wait, then switch of and hide  
    void switchoffbitaraddod()
   {
     //Moving door
    for(pos = 80; pos < 125; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
  
    //hiding door
    for(pos = 125; pos>=80; pos-=5)     
    {                                
    doorServo.write(pos);              
    delay(15);                      
    } 
   //Moving door
    for(pos = 80; pos < 110; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
  
    //hiding door
    for(pos = 110; pos>=80; pos-=15)     
    {                                
    doorServo.write(pos);              
    delay(15);                      
    } 
    delay(700);
   //Moving door
    for(pos = 80; pos < 125; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
    delay(700);
    //hiding door
    for(pos = 125; pos>=80; pos-=5)     
    {                                
    doorServo.write(pos);              
    delay(15);                      
    } 

    
    //----of switch of----//
  //Moving door
    for(pos = 80; pos < 155; pos += 8)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
   
    //Moving hand
    for(pos = 0; pos < 155; pos += 3)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }  
    
    //hiding hand
    for(pos = 155; pos>=0; pos-=3)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    } 
      
    //hiding door
    for(pos = 155; pos>=80; pos-=8)     
    {                                
    doorServo.write(pos);              
    delay(15);                      
    }    
    
  }   
  
  
  //move 3: open door then close it many times, wait, then quickly reoprn a nd switch off and hide.
  
  void crazydoor()
  {
     //Moving door
    for(pos = 80; pos < 155; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
    delay(800); 
    //Moving hand
    for(pos = 0; pos < 100; pos += 4)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }
    delay(1000); 
    for(pos = 100; pos < 129; pos += 4)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }    
    
    //hiding hand
    for(pos = 129; pos>=0; pos-=4)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    } 
      
    //hiding door
    for(pos = 155; pos>=80; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(25);                 
    } 
   }   
  
  

 // move 4: open door, then move hand very slowly forward and back to hiding very slowly, then quickly close door
 void crazyslow()
 {
 //Moving door
    for(pos = 80; pos < 155; pos += 1)   
    {                                   
    doorServo.write(pos);              
    delay(30);                       
    }
   
    //Moving hand
    for(pos = 0; pos < 120; pos += 1)  
    {                                   
    handServo.write(pos);               
    delay(30);                       
    }  
    
    //hiding hand
    for(pos = 120; pos>=0; pos-=1)      
    {                                
    handServo.write(pos);               
    delay(30);                        
    } 
      
    //hiding door
    for(pos = 155; pos>=125; pos-=1)     
    {                                
    doorServo.write(pos);              
    delay(30);                      
    }
    delay(100);
    for(pos = 125; pos>=80; pos-=4)     
    {                                
    doorServo.write(pos);              
    delay(15);                      
    }     
 }
 
  //move 5:
 void m7anika7anika() 
 {
  //Moving door
    for(pos = 80; pos < 155; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
     
    //Moving hand
    for(pos = 0; pos < 70; pos += 1)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }
    delay(800);
    
    
    //hiding door
    for(pos = 155; pos>=130; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(15); 
    }
    
    //hiding door
    for(pos = 130; pos < 155; pos+=3)     
    {                                
    doorServo.write(pos);              
    delay(15); 
    } 
     //hiding door
    for(pos = 155; pos>=130; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(15); 
    }   
    //hiding door
    for(pos = 130; pos < 155; pos+=3)     
    {                                
    doorServo.write(pos);              
    delay(15); 
    } 
     
    handServo.write(40);
    delay(1000);
      
    //Moving hand
    for(pos = 40; pos < 150; pos += 4)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    } 
    
    //hiding hand
    for(pos = 150; pos>=0; pos-=3)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    } 
    
      
    for(pos = 120; pos>=80; pos -=5)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }  
} 

//move 6:
void m3alla2()
  {
    //Moving door
    for(pos = 80; pos < 155; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
   
    //Moving hand
    for(pos = 0; pos < 120; pos += 4)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }
    //hiding door
    for(pos = 155; pos>=130; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(15);                      
    }   
    delay(2000);
    
    for(pos = 130; pos < 155; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
    
    for(pos = 155; pos>=140; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(15);
    }
    for(pos = 140; pos < 155; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
    delay(500);
    //hiding hand
    for(pos = 120; pos>=0; pos-=4)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    } 
      
    //hiding door
    for(pos = 155; pos>=80; pos-=5)     
    {                                
    doorServo.write(pos);              
    delay(35);                      
    } 
}

//move 8:   
void matrix()
 {
   //Moving door
    for(pos = 80; pos < 155; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
   
    //Moving hand
    for(pos = 0; pos < 80; pos += 4)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }
    
    for(pos = 80; pos < 120; pos += 1)  
    {                                   
    handServo.write(pos);               
    delay(30);                       
    }  
    delay(300);
    
    for(pos = 120; pos>=0; pos-=4)      
    {                                
    handServo.write(pos);               
    delay(10);                        
    } 
      
    //hiding door
    for(pos = 155; pos>=80; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(35);                      
    } 
 }

//move 9:
void sneak() 
 {
  //Moving door
    for(pos = 80; pos < 130; pos += 1)   
    {                                   
    doorServo.write(pos);              
    delay(30);                       
    }
    delay(2000);
    
    //Moving hand
    for(pos = 0; pos < 40; pos += 1)  
    {                                   
    handServo.write(pos);               
    delay(30);                       
    }  
        
    delay(500);
    
    for(pos = 130; pos < 155; pos += 4)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
    delay(100);
    
    for(pos = 40; pos < 90; pos += 4)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }  
    delay(500);
    //hiding hand
    for(pos = 90; pos>=70; pos-=4)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    }
    delay(100);
    for(pos = 70; pos < 90; pos += 4)  
    {                                   

    handServo.write(pos);               
    delay(15);                       
    }
    delay(100);
    for(pos = 90; pos>=70; pos-=4)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    }
    delay(100);
       
    for(pos = 70; pos < 145; pos += 4)  
    {                                   

    handServo.write(pos);               
    delay(15);                       
    }
    
    for(pos = 145; pos>=0; pos-=4)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    }    
    //hiding door
    for(pos = 155; pos>=80; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(30);                      
    } 
 }
   
//move 10:   
void zee7() 
 {
   //Moving door
    for(pos = 80; pos < 155; pos += 3)   
    {                                   
    doorServo.write(pos);              
    delay(15);                       
    }
   delay(2000);
   //forward @ full speed to the left
  digitalWrite(motorDirection, LOW); //Establishes RIGHT direction of Channel A
  digitalWrite(motorBrake, LOW);      //Disengage the Brake for Channel B
  analogWrite(motorThrottle, 100);    //Spins the motor on Channel B at full speed
  delay(300);
  digitalWrite(motorBrake, HIGH); //Eengage the Brake for Channel B
  delay(2000);
  
  //backward @ full speed to the right
  digitalWrite(motorDirection, HIGH); //Establishes LEFT direction of Channel B
  digitalWrite(motorBrake, LOW);   //Disengage the Brake for Channel B
  analogWrite(motorThrottle, 100);   //Spins the motor on Channel B at half speed
  delay(300);
  digitalWrite(motorBrake, HIGH); //Eengage the Brake for Channel B
  delay(1000);
  
    //Moving hand
    for(pos = 0; pos < 175; pos += 4)  
    {                                   
    handServo.write(pos);               
    delay(15);                       
    }  
    
    //hiding hand
    for(pos = 175; pos>=0; pos-=4)      
    {                                
    handServo.write(pos);               
    delay(15);                        
    } 
      
    //hiding door
    for(pos = 155; pos>=80; pos-=3)     
    {                                
    doorServo.write(pos);              
    delay(25);                      
    } 
 }

Credits

nerdyKat

18 projects • 6 followers

My name is Katarina. I'm an IT technician and I like to make stuff ;-)

Useless Box

Story

Step 1: Cutting

Step 2: Lollipop Lollipop . .

Step 3: And More Lollipop

Step 4: Hinges

Step 5: More Gluing and Sanding

Step 6: Servo Time

Step 7: Power

Step 8: Arduino

Step 9: Connecting It All Together

Step 10: Tiger Surgery

Step 11:

Step 12:

Step 13: Anti-scratch

Step 14: Painting

Step 15: Finishing

Step 16: Final Thoughts

Custom parts and enclosures

Useless Machine

Schematics

Useless Machine

Code

useless_machine.ino

Credits

nerdyKat

Comments

Embed the widget on your own site

Useless Box

Useless Box

Story

Step 1: Cutting

Step 2: Lollipop Lollipop . .

Step 3: And More Lollipop

Step 4: Hinges

Step 5: More Gluing and Sanding

Step 6: Servo Time

Step 7: Power

Step 8: Arduino

Step 9: Connecting It All Together

Step 10: Tiger Surgery

Step 11:

Step 12:

Step 13: Anti-scratch

Step 14: Painting

Step 15: Finishing

Step 16: Final Thoughts

Custom parts and enclosures

Useless Machine

Schematics

Useless Machine

Code

useless_machine.ino

Credits

nerdyKat

Comments

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