Final Project¶
Bill of Materials (Subject to Change)¶
| Items # | Descriptions | Vendor | Quantity | Cost | Link |
|---|---|---|---|---|---|
| 1 | IR LEDS | Amazon | 1 | 7.99 | Link |
| 2 | CIS Sensor | Amazon | 2 | 45.99 | Link |
| 3 | Flat Cable | Amazon | 2 | 15.99 | Link |
| 4 | Teensy3.X | Amazon | 1 | 24.42 | Link |
| 5 | Raspberry Pi 3 B+ | Amazon | 1 | 44.8 | Link |
| 6 | Plexiglass 8X10 | Amazon | 1 set of 6 | 7.99 | Link |
| 7 | 2-Way Mirror 12X12 | Amazon | 1 | 29.99 | Link |
Tutorials¶
Final Project Idea¶
My final project is a touch screen magic mirror. In my drawing the image on the left is an IR Frame. I had a test idea that I created in Electrical Engineering class. The idea is to use IR recievers and IR leds. The leds send a signal to the other side full of recievers. The four sides togeth create a matrix grid that with calculate where ur finger is and when you press down on the screen, it turns it touch screen. I’m still deciding if i want to use a CIA sensor, the sensor inside a printer, or the recievers. In class I used the recievers and it worked but I don’t know how accurate tat will be.
Then for the screen part, just likeany magic mirror, I will us a PC screen behind a double sided mirror. My goal for this project is to make it touch screen and to be able to listen to music and watch movies. If I have extra time, I would like to be able to connect my phone with bluetooth as well. Since I want to beable to have sound, I will be using speakers.
Finally, I’m going to create a frame to cover up the IR Frame that will be CNC out of wood and then painted to look more pretty and to cover the wires that may be hanging out.
Why CIS Sensor?¶
A CIS sensor, is in most scanner. In those devices, it’s basically a black and white camera which reads only one line of pixels. To scan a color document, a RGB LED blink in the three colors and the CIS reads all of them for every line of the document. Then it can calculate the exact colors depending of the Red Green and Blue reaction.
Using a CIS sensor gives you access to 2700 light sensors on a 20cm line. Most people who take sensors and actuators from an old printer/scanners only take the RGB LED and the light conductor from this part.
For my project, I will be using one CIS sensor with 24 IR LEDs. The object is detected on a surface by a Teensy board. This board turns the IR LED ON, reads the CIS and calculates the exact position of an object. Then it sends the coordinates as a mouse, a keyboard, a Python program or just as Serial on a Raspberry Pi.
Electrical Engineering Capstone Project¶
The link to all the documenting can be found here.
The first step to this was to find a tutorial that would help me. Unfortunetly, the CIS sensor wasn’t coming in time before the sure date, there for I had to improvise. I found IR reviever LEDs and compiled enought reasearch to come to a conclusion that they will act the same. Below is a video of me getting the IR LED and Reciever to work together.
The next step was to create the item that I was going to be comtrolling. I didn’t have a screen yet, there fore I improvided again and did more reasearch. This led me in the direction to use matric and where ever the finger is, that LED turns on. Below is a video of me testing the matrix once I finished soldering.
Then I put the two together and got something that ended up like this video. As you can see, when ever I hacve my LED across the sensors, the LED turns off which is a good sign. I didn’t get ot finish this project but it definitely helped me set up for my fab project.
2D and 3D Modeling¶
For the final project designing, I designed an outline in Fusion360. The wood outside is a wooded frame thats going to be going around the sensors, LED and wires behind those. The inside is the mirror. That is going to be a two way mirror thats going to reflect the screen. The container at the bottom it where I am playing to put my board that I create.
Setting Up Magic Mirror¶
Beofre I could continue with anything else in this project, I needed to set up the magic mirror. This is because I plan on using the doppler radar to turn on the mirror. But I cant have it do that before setting up the mirror. To set up the Magic Mirro the first thing was to set up the rasberry pi.
Setting Up Rasberry Pi¶
For this project I will be using a Rasberry Pi 4 Model B. To set it up I followed this tutorial.
The first step was to download the Rasberry Pi Imager. I used that link to download it and downloaded the newest version of it. It took me through a few different steps and I clicked Ok in everyone.
Then I needed to plug the SD card into my computer and flash it using the imager. To do this I chose my divice first which is the Rasberry Pi 4. Then the next step is the Operating System. There is a recommended one based on the device you chouse. I recommend using that if you aren’t sure but mine was the Rasberry Pi OS(64-BIT). Finally the last section was the storage. I was using a SD card therefore, thats the option that I chose.
Once I finished setting up those I clicked next, and and it brought me to the following page. This is where you set up the wifi for your rasberry pi and the username and password to use it. The user name will be used in the terminal. The SSID is the name of the wifi you are using and the pasword it the password of the wifi. It is also important to set up the time zone and the keyboard layout.
After that I clicked save and then it moved on to the writing. This took a very long to do.
Once the writing was done, then I could remove the SD card from the reader, and then added it into my rasberry pi.
