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Week 17. Application and Implications/project Development

Assignment:

  • What will it do?

  • Who has done what beforehand?

  • What will you design?

  • What materials and components will be used?

  • Where will they come from?

  • How much will they cost?

  • What parts and systems will be made?

  • What processes will be used?

  • What questions need to be answered?

  • How will it be evaluated?

What will it do?

My proposed project “CHOCOBOT” involves implementing a system where an ultrasonic sensor will detect motion at certain range and welcome speech will be played from the speaker for initially greeting the individual who comes near to the model and emphasizes or encourages the user to be mindful regarding the waste and recycling the materials. My speaker will be attached inside the mouth of a dog mounted on a 3d printed casing. After greeting is done from the speaker, next audio will be played which includes that “If you all throw waste, you all will be rewarded at the end with chocolates. So my main intention of this project is to educate children as much as possible regarding the recycling of waste. In the next stage if the individual agrees to the delivered speech and throws the garbage inside the thrash bin, time of sensor(VL53LX) will be triggered and then again audio will be played through the speaker. Finally servo motor will be triggered and then it will rotate and then chocolate will be dispensed from the chocolate dispensing jar which is made out of 3d print.

Who has done what beforehand?

As of now I didn’t see any one doing the similar kind of project comprising of dog model which can actually dispense the chocolates but there are many other projects mentioned below which had been done by people which includes;

  • Motion sensing

  • Audio playback

  • Candy/chocolate dispensing

  • Cardboard or custom enclosures

What will you design?

For the designing part, I will design the model of dog which is main aspect of my project and in addition to that I will also design the chocolate dispenser module with the barrel followed by that PCB casing to mount my PCB and also speaker mounting casing to mount the speaker. I will even design the nose of the dog where I can mount the ultrasonic sensor.

What materials and components will be used?

  • MCU XIAO ESP32C3

  • Speaker 8 ohm, 0.5 watt

  • 5V USB adapter

  • Female header pins

  • Ultrasonic sensor

  • 3D print PLA

  • 18 mm thick rubber wood

  • DFPlayer Mini

  • Servo motor

  • VL53L1X (Time of flight sensor)

Where will they come from?

In order for me to sucessfully complete my project on time, I used almost all the resources and materials which are already available at the lab (JNWSFL). I was not required to order any materials from outside.

Component Quantity Price ($) Total Price ($) Source
ESP32C3 1 $7.49 $7.49 JNWSFL
Speaker 8 ohm,0.5 watt 1 $4.4 $4.4 JNWSFL
5V usb adapter 1 $2.5 $2.5 JNWSFL
Female header pins 22 $7.99 $7.99 JNWSFL
Ultrasonic sensor 1 $3.95 $3.95 JNWSFL
3D print PLA 1 $2.1 $2.1 JNWSFL
18mm thick rubber wood 1 $5.85 $5.85 JNWSFL
DF player mini 1 $4.99 $4.99 JNWSFL
Servo motor 1 $13.99 $13.99 JNWSFL
VL5L1X 1 $4.48$ $4.48 JNWSFL
Screw terminal 7 $0.60 $0.60 JNWSFL

Total Price: $58.34/- only which is equivalent to Nu.4985.15/- only

What parts and systems will be made?

  • The main dog model will be made from the cardbox using zund machine

  • The chocolate dispensing kit, eyes, nose where ultrasonis sensor is mounted and the pcb casing are 3d printed.

  • The base where the whole model is mounted and the dustbin is machined using shopbot

  • A custom electronics board will be designed and soldered.

  • Programming will be done in Arduino IDE.

What processes will be used?

  • Subtractive manufacturing using shop bot

  • Additive manufacturing using bambu printers

  • Electronic PCB design using KiCad.

  • Electronic PCB production (milled on Roland SRM20).

What questions need to be answered?

  • How can I easily assemble all the parts in the casing?

  • Who will benefit most from my project?

How will it be evaluated?

The project can be evaluated based on the following criteria:

  • Incorporation of subtractive manufacturing for the main base plate and the dust bin.si

  • Additive manufacturing for pcb casing and all other components for the project

  • Custom-made PCB board designed using KiCad and produced.

  • Successful interfacing and programming of the embedded microcontroller.

  • Aesthetically pleasing packaging.