11. Applications and Implications

Defining my project scope

My Final Project idea is a smart coffee cup. It’s a product with industrial production scope and; because it’s an object of daily use, it would have a very good reception in the market.

In the last weeks of the course I discovered Ember, the world’s first temperature control mug. So even if I had the idea by myself, this startup proved that the scope of this product is world-wide.

Project Plan

What will it do?

This cup will be able to detect when your coffee has cooled to turn on its warming system and shoot up your drink to a selectable temperature. It will reconize also when there is no more liquid inside to automatically turn off. It will be made in ceramics or glass with a sophisticated and innovative design.

Who’s done what beforehand?

Massimiliano D’Angelo Molding and casting exercice

FabLab Taipei Project

Ember (Exactly what I want to do)

Ember, the product’s name, is actually a patented technology and it wins almost 6 design prizes.

What will you design?

Here’s the list of things to be designed:

  • Cup made out of ceramics, biopolimer or glass. Designed and printed in 3d. Molding and Casting
  • Case for system integration. Ideally made out the same cup’s material.
  • Electronic board
  • Heatting system

What materials and components will be used?

Materials

  • Ceramics or glass
  • Bamboo or acrylic
  • PLA - 3d printing fillament

Components

Hello Wold’s BOM :

PartValueDevicePackageDescription
C11uFC-EUC1206C1206CAPACITOR, European symbol
IC1ATTINY44-SSUATTINY44-SSUSOIC14
J2FTDI-SMD-HEADERFTDI-SMD-HEADER1X06SMD
R110kR-EU_M1206M1206RESISTOR, European symbol
R2150RES-US1206FABR1206FABResistor (US Symbol)
R310kRES-US1206FABR1206FABResistor (US Symbol)
R40RES-US1206FABR1206FABResistor (US Symbol)
S16MM_SWITCH6MM_SWITCH6MM_SWITCHOMRON SWITCH
U$1LEDFAB1206LEDFAB1206LED1206FABLED
U$2TERM-1X03'-FABLAB'TERM-1X03'-FABLAB'ED555DS-3DS3.5mm terminal block, 3 positions ED555-3DS as found in the fablab inventory.
U$3AVRISPSMDAVRISPSMD2X03SMD
XTAL120MHZRESONATOREFOBM

To find my board’s BOM:

Once that done I could start to design my electronic circuits. First I had to import the components into the work area.

There are some indispensable components in a PCB:

  • Microcontroller
  • capacitor (is like a filter between GND and VCC)
  • oscilator (determines the pulse or the speed )
  • 10k resistor to RST (prevent from reseting the micrcontroller)

Besides theses, all inputs and outputs has to be installed with other components following their datasheet’s indications.

Final project’s BOM

PartValueDevicePackageDescriptionMFMPNOC_FARNELLOC_NEWARKPOPULARITYXTAL
5VREGULATORSOT23SOT23
11.1VPINHD-1X2/901X02/90PIN HEADER24
C21uFCAP-UNPOLARIZEDFABC1206FAB
D1LEDFAB1206LEDFAB1206LED1206FABLED
IC2ATTINY44-SSUATTINY44-SSUSOIC14
LED2LEDRGBOLDP-LCC-4-3OSRAM
LM1PINHD-1X31X03PIN HEADER92
Q1NMOSFETTO252TO252MOS FET
R10RES-US1206FABR1206FABResistor (US Symbol)
R21kRES-US1206FABR1206FABResistor (US Symbol)
R30RES-US1206FABR1206FABResistor (US Symbol)
R40RES-US1206FABR1206FABResistor (US Symbol)
R50RES-US1206FABR1206FABResistor (US Symbol)
R71kRES-US1206FABR1206FABResistor (US Symbol)
R1010kRES-US1206FABR1206FABResistor (US Symbol)
R11499RES-US1206FABR1206FABResistor (US Symbol)
R12499RES-US1206FABR1206FABResistor (US Symbol)
R13499RES-US1206FABR1206FABResistor (US Symbol)
U$3AVRISPSMDAVRISPSMD2X03SMD
U$4WIRELESS-BLUETOOTH-HC-05WIRELESS-BLUETOOTH-HC-05WIRELESS-BLUETOOTH-HC-05Bluetooth Transceiver Module based on HC-05 board
VW237-02PW237-132WAGO SREW CLAMPunknownunknown10
XTAL120mHzRESONATOREFOBM20mHz

REGULATORSOT23 has been replaced by LM7805

Where will come from?

  • Bamboo is a material that grows a lot in our country.
  • Ceramics are also accesible in my city at a potery studio.
  • Components are provided by the lab. If not, there are electronics specialized stores where we can find some.
  • Amazon and Digikey are allways available.

How much will they cost?

  • MOSFET LM7805: ~1 $

  • PINHD-1X2/90:

  • CAP-UNPOLARIZEDFAB: 0.36 $

  • LEDFAB1206: 0.39$

  • ATTINY44-SSU: 3.54 $

  • LEDRGBOLD: 1.8 $

  • LM35: 1.5$

  • RES-US1206FAB: 0.03 $

  • AVRISPSMD: 1.8 $

  • WIRELESS-BLUETOOTH-HC-05: 8$

  • RESONATOR: 1.29 $

  • Regulator 5V: 0.5 $

  • Bamboo board 2400 x 300 x 20mm : 21,49 $ The idea is to join more or less 5 bamboo cylinders (100x100x20mm) cutted and milled in a CNC machine to make the facade of the mug. So the price of this material would be 1.50 $ per piece.

  • Cercamic: 5$ per gallon I calculate I can make more or less 30-40 pieces with a gallon of liquid ceramic so the price would stand between 0.12 and 0.16 $ per piece + 0.60 $ I payed for the potery cooking. So between 0,72 and 0,76$ per piece.

  • 3D Printing: The impression lasted but less an hour and a half.

What parts and systems will be made?

  • The cup
  • The PCB
  • The heating system
  • A smartphone application
  • The case for the product integration
  • The handle

What processes will be used?

  • Molding and casting - cup
  • Computer Controlled Machining - case and facade
  • Electronics design - PCB
  • Electronics production - PCB
  • 3D printing - Handle
  • Embeded programming - PCB Program
  • Interface and application programming - App

What questions need to be answered?

  • What are the min and max temperatures required?
  • How long will the battery last?
  • Where the sensor will be located?
  • Where the coil will be located?
  • What the program will do?

How will it be evaluated?

Verifying if:

  • the heater works
  • the program, inputs and outputs work together
  • the heating system really keeps the liquid warm.
  • the battery last
  • the are not overwarming into the PCB

Learning outcomes

Develop a project plan

  • [x] Have you answered these questions?