13. Applications and implications

This Weeks’ Task

Propose a final project masterpiece that integrates the range of units covered, answering: 1. What will it do? 2. Who’s done what beforehand? 3. What will you design? 4. What materials and components will be used? 5. Where will it come from? 6. How much will they cost? 7. What parts and systems will be made? 8. What processes will be used? 9. What questions need to be answered? 10. How will it be evaluated?

1. What will it do?

The device is to be designed in such a way to allow re-heating of beverages. At first the idea was to design a coaster which has heating elements embedded into it, to aid in the heating process. Then, I thought of upgrading the idea into a whole new level. The device will be created in a shape of a mug where the heating process will take place throughout the device. The device will support mugs of an average height of 15 cm.

2. Who’s done what beforehand?

Thermal mugs have been used currently to maintain the heat of the drinks and bottles, such as puff bottles which are used as a source of heat maintenance for the drinks. However, I have not come across a concept similar to mine so far.

3. What will you design?

The device as a whole will be designed by myself. Starting from the input devices which consists of thermistor, hall effect and potentiometer, and the output device which consists of the heating pad. In addition, the outer case of the whole device will be made by either 3d printing or laser cutting, or a mix of both depending on my final design

4. What materials and components will be used?

Process	Material
3D printing	ABS/PLA
Laser cutting	Acrylic

Input circuit components

1. 20 MHz Resonator
2. 0 ohm Resistor
3. 4 10k ohm Resistor
4. 200 ohm Resistor
5. Thermistor
6. 1uF Capacitor
7. IC1 ATTiny44
8. J2 FTDI
9. J1 AVRISPSMD
10. White LED
11. Hall effect sensor

Output circuit components

1. 20 MHz Resonator
2. 0 ohm Resistor
3. 2 10k ohm Resistor
4. 2 200 ohm Resistor
5. N channel Mosfet
6. 1uF Capacitor
7. IC1 ATTiny44
8. FTDI header
9. AVRISPSMD (2x3)
10. AVRISPSMD (2x2)
11. Heating Pad
12. Red LED
13. Green LED
14. Potentiometer
15. USB mini B

5. Where will it come from?

The materials for 3D printing and laser cutting will be provided by the lab, which is bought from our local shops.The electronic components are mostly ordered online from:

1. Digi-Key
2. Sparkfun

6. How much will they cost?

Qty	Part name	Description	Total Price ($)
2	IC1 ATtiny44	Microcontroller smd	1.48
2	Resonator	20 mhz smd	0.6
2	Capacitor	1uF smd	0.1
2	Resistor	0 ohm smd	0.2
6	Resistor	10k ohm	3.6
4	Resistor	499 ohm	1.4
1	Thermistor	sensor	3.04
1	Hall effect	sensor	0.7
1	Potentiometer	sensor	0.95
1	N channel mosfet	transistor	0.6
2	2x3 pin header	AVRISPSMD	0.3
1	2x2 pin header	AVRISPSMD	0.15
2	1x6 pin header	FTDI header	0.3
1	Heating Pad	5x10 cm	3.95
1	Usb B mini	-	0.99
1	LED	White smd indicator	0.63
1	LED	Green through hole indicator	0.64
1	LED	Red through hole indicator	0.64
2	PCB	Circuit board	1.4

7. What parts and systems will be made?

1. The body of the device will be manufactured using 3D printing and laser cutting.
2. The mug used for testing will be a mug of my own.
3. The heating element will be ordered online which is a heating pad.
4. The electronic parts which consists of the input and output circuits will also be designed.

8. What processes will be used?

1. Laser cutting
2. 3D printing
3. Electronics production and design
4. Network and communication
5. Computer aided design

9. What questions need to be answered?

In my opinion, the main question that needs to be answered is whether the whole purpose of the device is accomplished or not, i.e can it reheat the beverages or not. Also, the temperature range that is to be decided, will it be effective for heating the drink or not?

10. How will it be evaluated?

Mainly if it succeeded in reheating the drinks in less amount of time, and, if it was able to maintain at constant temperature for a long period of time, depending on the user.