How to Make HUNGRY ROBOT - EAT EVERYTHING! (3d Printer, Arduino, Sensor, Servo)

About: Hi, I'm Eunchan Park from S.Korea. I have 3 missions Making Happy Things, Sharing How To Make Happy Things, Copying Happy Things Maker for the world's Happiness In order to pursue my mission, I have a big go...

I really love to make use-for-nothing robots such as Drinky (Drinking buddy robot). I want to make a robot for emotional purpose not for functional. This is fun, makes smile and feels good.

This robot is also one of useless robot but, I'd like to make a funny robot! There are many coin-eating robots (Robie). I'm going to make it by using 3d printer and an Arduino. All source code and 3d printing modeling files are opensource. Feel free to make it by yourselves.


Step 2: ‚ÄčInstall Arduino IDE

Step 3: Install CH340 Driver (for Chinese Version)

Step 4: DOWNLOAD - Source Code

Step 5: Select Board / Processor / Com Port

Select Arduino Nano / ATmega328P (Old Bootloader)

Step 6: Plug Your Arduino Nano

Step 7: Find / Select Emerging Com Port

if you plug the Arduino, a new com port will be appeared

Step 8: Hit the Upload Button


Download 3d modeling files from Thingiverse

Step 10: Print All Parts One by One

Brim setting needs at least 1 mm


In this circuit, all parts are connected with Female - Female Dupont Cable. In order to save space in the robot, we need to cut and re-wire manually.

A servo motor uses 3 pins. Vcc and GND is essential. A PWM pin must be allocated with the servo motor. In this project, pin 13 is used.

The sensor is an infrared sensor. The sensor uses 3 wires as well. In order to read distance from an object, the arduino neeeds to read an analog input. In this project, A7 pin is allocated.

Step 12: Prepare F-F Cable and the Sensor

In this circuit, all parts are connected with female-female Dupont cable.

Step 13: Cut the Wire

in order to save space in the robot we need to cut and rewire manually. This sensor is an infrared sensor The sensor uses three wires. in order to read distance from an object, the Arduino needs to read analog signal from this sensor. we are going to use pin A7 for obtaining the sensor value

Step 14: Strip the Cable End by Using a Stripper

Step 15: Twist Wires and Finish With the Tape

Step 16: Wiring the Servo Motor

A servo motor uses three pins. VCC ground and PWM.

A pwm pin from the Arduino must be allocated with the servo motor.

In this project we are going to use pin 13.


Let's assemble hardware part.

Step 18: Making Arms

The black one is a horn from servo motor.

We need to use the screwdriver and screw bolt.

Step 19: Put the Small Part Behind of the Motor

Step 20: Put the Motor Inside of the Body

and fix the motor with the body.

Step 21: Put the Sensor Into the Body and Make Sure the Direction

Step 22: Assemble the Basket Part

Step 23: Put the Part in Front of the Body

Use the cable tie from inside to outside.

Step 24: Put the Cable Tie Through the Hole.

Step 25: Use One More Cable Tie.

cut the rest of cable tie.

it's very simple

you don't need to use bolt anymore.

Step 26: The Head Part

I'm gonna assemble the head part in the same way.

Put the cable tie through the hole and use one more cable tie.

Check the head moves well. Cut the rest of them

Step 27: Assemble the Link Part

This part is most important part.

This is a link and it links from head to body.

Assemble them together in same way. Try some move.

Step 28: Connecting the Wires

Make sure the color, location and pin numbers

Step 29: Connect Them on the Arduino

make sure the colors

Step 30: Put the Arduino in the Body and Plug the USB Cable

And then, assemble the cover

Step 31: Attaching the Eye Balls

used Blu Tack

Step 32: DONE!!!



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