Door Close Bot

So, for a school project we needed to make something for a problem or inconvenient we encounter around the house.

This thing needed to be made with at least two machines we had available at school, i chose to use a 3D-printer and a lasercutter. There also needed to be some electronics involved with it, at least a microcontroller like an arduino and some inputs and outputs.

I decided to make some sort of cart that can be used to close the door when someone leaves it open or the dog walks in.

The controls will be done via bluetooth with an app called Dabble, wich will be easy to integrate with the arduino.

In the attached PDF is a list with the things needed for this project.

All the four parts attached here needs to be 3D printed, i printed mine on a bambulab P1P printer with Esun Matte PLA.

If your printer is any good you should be able to print everything without supports, the bridging with the main body is kinda big but should be possible.

These two attached svg's are the things that need to be lasercut with 4mm plywood.

I spray painted the lasercut parts to look nice but you don't have to of course.

The arm can be glued together once they are cut out.

!!Make sure to have the 4 holes that are the furthest apart on the Bearing side and the holes that are closer together on the servo side!!

In the photo you can see the electronics scheme.

The four motors need to get some 15-20 cm wires soldered to them.

There also need to be wires soldered to the buckconverter.

And make sure the buck converter is set to output 5 volts.

And for the rest if you follow the scheme it should all be good.

I attached the program I made here, you can open that with arduino ide and sent it to the arduino.

But first make sure that you have all the libraries installed that are needed for this project, those are:

Dabble.h, Wire.h, Arduino.h, VL53L0X.h, Servo.h, L298N.h

I'm using the app dabble on an android phone to control this thing.

https://play.google.com/store/apps/details?id=io.dabbleapp&hl=en_US

In the app connect to the arduino with the connect button and use the gamepad mode.

The arrows are for forward, reverse, left and right as you aspect.

The square button is arm 0 degrees, triangle is arm 90 degrees and circle is arm 180 degrees.

If the electronics are working as it should, everything can be installed onto the main body.

First place the motors in their spots, route the cables through the holes and bolt them hand tight.

Than place alle the electronics inside and bolt them on the intended holes.

Slide the breadboard in the slot and the battery holders can also be placed.

Connect everything as seen by the electronics part.

The bearing can than be placed, aswel as the switch.

After that the arm can be prepared with the base, connector, roller and lasercut part.

Then the servo can be mounted.

At least the heat inserts can be placed with an soldering iron and than the cover can be placed.

And now you have one finished Door Close Bot.