WEEK 16: APPLICATIONS & IMPLICATIONS


PROPOSE A FINAL PROJECT MASTERPIECE THAT INTEGRATES THE RANGE OF UNITS COVERED:



WHAT WILL IT DO?

For Final project, I want to make PROPELLER LED PENDULUM CLOCK Persistence of Vision (POV) displays are generally LED displays which ‘show’ images by displaying a section of an image at a given time, in quick rapid succession. The human brain perceives this as display of a continuous image. Basically, I added two options in led pendulum clock "Analog and digital" time display using Arduino IDE programming. POV displays do so by rotating an LED arm at very high speeds, about 1000+ RPMs and by using encoder feedback blink LEDs in a sequence in such a way that a continuous display is shown across the moving axis.

WHO'S DONE WHAT BEFOREHAND?

Idea is not new as many peoples are making POV projects, A few POV displays have been tried before in Fab Academy. Even according to Neil they are very hard to pull off because of so many major variables in play. Among the one's already attempted, I really liked Shaunta Butler's one because of the mechanical complexity she tried to tackle. Shaunta tried to make a POV hat which would be mounted to the head and would create that POV display around someone's face.


An example of the commonly seen Horizontal POV displays- by Cornell ECE Dept.


POV cylinder Display. (locked from both ends) -image from Arduino Project Hubs


WHAT WILL YOU DESIGN?

I planned to design the propeller led pendulum Clock which displays the Analog as well as the Digital time. I also made the IR remote which controls the mode changing from Analog to Digital then Digital to Analog as well as IR remote have options for changing Hour needle, Changing Minute needle and second reset buttons. We can change the clock time according to current time. I will laser cut the 3D CAD design on Acrylic, For remote casing I will use 3D print.


WHAT MATERIALS AND COMPONENTS WILL BE USED?

  • 3mm Black colored Acrylic sheet(1.2x1.2-fts)
  • 3mm white/colored Acrylic sheet(0.5x0.3-fts)
  • PLA for 3D printing
  • 328P based Microcontroller board
  • Led Strip "PCB Designning".
  • 5mm transparent Leds with different coluors.
  • IR transmitter led.
  • IR Receiver module/led.
  • female to female and male to female wires
  • Lipo Battery
  • 12v DC Motor


WHERE WILL COME FROM?

The most of Electronics components (Acrylic and PLA) will be used of the Fab lab. Following are items which I will buy from outside sources.

The 3.7v Lithium ion Battery Hallroad.org
5mm Leds Hallroad.org
The Hall Effect Sensor(Sadar Bazar Karachi) IR Receiver and Transmitter Hallroad.org
The 12v Dc motor(Local Market)



HOW MUCH WILL THEY COST?

Bill of Material?

Components

Number of components * Price of
components(USD)

Total price (USD)

3.7v Lithium Ion Battery

2*1.5

3

12v Dc motor

1*1.4

1.4

Hall Effect Sensor

3*0.33

1

5mm Leds

20*0.032

0.64

IR Transmitter

1*0.06

0.06

IR Receiver Sensor

1*0.7

0.7

1.5*1.5-ft 3mm Black Acrylic Sheet

1*3.3

3.3

Atmega328p

2*2

4

PLA 3D printed pieces

0.021/1g required 82g.

1.722

15.822$


WHAT PARTS AND SYSTEMS WILL BE MADE?

3D printed remote casing.
Laser cutting the Acrylic Sheet for remote and for cad designing.
Vinyl cutting Logo and time indication short keys.
3D printing for Cad Designing.
PCB Atmega 328p Board for led strip.
PCB Atmega 328p Board for IR Remote.



WHAT PROCESSES WILL BE USED?

1. 2D designing: 2D designing of Propeller Led Pendulum Clock frame.
2. CAD designing and Laser Cutting: 3D desinging using Solid Work Softwere and laser cutting using Acrylic Sheet .
3. Electronics desinging: full PCB Designing with SMD components and Microcontroller designing using ATmega 328p.
4. Electronics Production:Generating .rml files from mods, milling using SRM-20 and soldering SMD components.
5. Microcontroller programming: Programming will be done in main ATmega328p based board.
All input output devices will be controlled with main board using manullay Button as well as controlled using IR sensor based board.
6. Interface and Application: Will be decided.
7. Networking: IR remote testing wirelessly.



WHAT QUESTIONS NEED TO BE ANSWERED?

Is system integrated and work properly as required?
Is the Analog and Digital Clock have same time at a time?
Is the IR remote work properly?
Is the LED refresh rate be fast enough for the POV effect


HOW WILL IT BE EVALUATED?

Demo video
Getting the Mechanical Assembly (motor) working
Making the Electronics work together
Sending data to the LEDs
Creating the POV effect






Propeller Led Pendulum Clock by Engr. Rashid Ali is licensed under Attribution-ShareAlike 4.0 International



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