| Name | NetID | Section |
|---|---|---|
| Michael Wang | mjwang6 | ECE 120 |
Jung Ki Lee | jungkil2 | ECE 110 |
Statement of Purpose
The purpose of this project is to develop two identical devices capable of both one-way and two-way communication via Morse code.
Background Research
Morse code is a system of communication that represents numbers and letters using dots, dashes, and spaces. These elements of Morse code can be transmitted in a variety of ways, such as through sound or lights. We intend to use LEDs and photocells to transmit and receive Morse code signals, respectively. The LED and photocell may be connected to a computer, such as a Raspberry Pi, which will then interpret the signals.
Block Diagram / Flow Chart
Below is the diagram for one device. We will be making another identical device to allow for two-way communication.
System Overview
There are five main parts to the device. The keyboard will be used to input either plaintext or Morse code. We will implement a hotkey to toggle between plaintext to Morse code entry. Next, we'll use a computer (Raspberry Pi Pico) to interpret the input and output it to a display. Then, when the user presses the enter key, the computer will transmit the message using the LED. To receive messages, the device will use a photocell to detect flashes of light, which will then be interpreted by the computer, which will output it to the display. Finally, a rechargeable battery will power the computer, which in turn will distribute power to the rest of the system.
Parts
| Part Name | Description | # | Cost | URL | Vendor |
|---|---|---|---|---|---|
| Raspberry Pi Pico | Interpret input and transmit output to hardware and distribute power. Includes headers for pins | 2 | $5.00 | https://www.adafruit.com/product/4883 | Adafruit |
| Laser module | Provide focused source of light to convey signals | 2 | $5.95 | https://www.adafruit.com/product/1054 | Adafruit |
| Photocell | Allow for reception of signals from laser | 2 | $0.95 | https://www.adafruit.com/product/161 | Adafruit |
| Battery | Provide power to system | 1 | -- Wont buy for now. | ||
| Female USB A Cable | Provide a place to plug keyboard in to raspberry pi | 2 | $1.95 | https://www.adafruit.com/product/4449 | Adafruit |
| ABS Filament | For 3-D printing housing | 1 |
Already available | MatterHackers |
Total cost: $27.70
Possible Challenges
- The photocells may not be sensitive enough to distinguish the LEDs we are using from ambient light
- We'll have to find a way to create an enclosure of some sort to house all the components
Final Report and Video Demonstration:
Final Report: https://docs.google.com/document/d/12s8p7if7GN1HFZnK_DEBYBpdXnLSMg9yPmt57hP-N_o/edit?usp=sharing
Video Demonstration:
References
[1]"Morse Code | Invention, History, & Systems", Encyclopedia Britannica, 2021. [Online]. Available: https://www.britannica.com/topic/Morse-Code. [Accessed: 19- Sep- 2021]
Attachments:
MCTECEHonorsLab.drawio.png (image/png)
MCTECEHonorsLab.jpg (image/jpeg)
ASCIICommuncation.py (application/octet-stream)
Comments:
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Seems like a reasonable project 
Posted by elihf2 at Sep 21, 2021 18:32
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Instead of using LED's, you might want to consider using a laser module (https://www.adafruit.com/product/1054) which will provide you with a more focused light source and won't disperse across longer distances. You can also augment this by adding a fiber optic cable instead of simply having the laser travel through air, which would give you better alignment and allow communication without the two devices being within line of sight.
Posted by jamesw10 at Sep 23, 2021 16:30
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Seems like a fun project! I think that you may finish early and have to build upon the existing project but we can address that when the time comes. Keep in mind you need a digital logic gate to fulfill the ECE 120 requirement. I will approve your project and you are group #20
Posted by dbycul2 at Sep 28, 2021 00:34
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