CS 353 Jan 2025 Syllabus Labs/Projects

Lab Goals Part 0: Software Setup Part 1: LED Part 2:
IR LED Part 3:
IR Detector Part 4:
IR Switch Check-in

Lab 1: Infrared Switch	Goals Wire a circuit. Calculate the required resistor for an IR LED. Program a micro-controller. Read from a sensor and write it to the Serial Port. Build a switch that turns on an off an LED by blocking the path between an Infrared LED and Infrared Detector.
Part 0: Software Install	Arduino Install Instructions on Personal Computer On your personal computer, Download Arduino IDE 2.3.4 for your specific operating system. Click "Just Download" twice. Download Link Arduino Install Instructions on Lab Computers On your personal computer, Download Arduino IDE 2.3.4 Linux AppImage 64 bits. Click "Just Download" twice. Download Link Connect to your Personal Drive on Filer Navigate to `Personal/[colbyusername]/Desktop` Drag and drop the AppImage from your downloads to the `Desktop` folder Login to a Dwarf to make sure the application is on your Desktop.
Part 1: LED	We will be building the LED circuit described in: Ch 5. Electricity and Metering of Learn Electronics with Arduino First, figure out which resistor is the 220-ohm resistor Next, build the circuit Attach one end of a jumper to the 5V pin on the Arduino, and the other end of the jumper to the power bus on your breadboard (that’s the column marked with a red +). Grab another jumper and attach one end to the GND pin on the Arduino, and the other end to the ground bus on your breadboard (that’s the column marked with the green –). Connect a jumper from the power bus to a row of tie points. Connect one lead of a 220-ohm resistor to the same row of tie points. The other end goes in another row of tie points. Connect the anode (long leg) of the LED to the other lead of the resistor. Attach a jumper from the cathode (short leg) of the LED to the ground bus.
Part 2: Infrared LED	Build a circuit to power the Infrared LED The infrared emitter is a light emitting diode (LED) that specifically emits near-infrared light (just below the visible spectrum). Using Ohm's Law, calculate the resistor required for the infrared LED. Remember in a series circuit, the current that flows through each of the components is the same. Use the IR LED datasheet to look up it's maximum Continuous Forward Current and the Typical Forward Voltage associated with the maximum Continuous Forward Current. Replace the red LED with the IR LED, and the 220-ohm resistor with your newly calculated resistor. Equations V_resistor = I_resistor * R_resistor V_power = V_{IR LED} + V_resistor
Part 3: Infrared Detector	Build a circuit to read from an Infrared Detector Given the infrared-sensitive phototransistor, build the circuit below. A phototransistor is a sensor that is able to detect light levels and alter the current flowing between emitter and collector according to the level of light it receives. The component with the red dot on top is the IR Detector. Use a 10k resistor for the IR Detector Circuit. Connect to the Metro Mini Using a micro USB cable, plug your arduino into the computer. Specify the Board as an Adafruit Metro and the USB Port. Read the signal from the Infrared Detector and write Serial There are two built in functions, `setup()` which runs once at the beginning and `loop()` which runs repeatedly. Have the Metro Mini start the Serial Port in the setup function by adding the line `Serial.begin(9600);` Read from the analog input pin in the loop by assigning `analogRead(A0)` to a variable. Print the value to the serial port using `Serial.println(...)` Upload code to the Metro Mini using command-U or ctrl-U. Open the serial port monitor using shift-command-M or shift-ctrl-M. Save your code! Hint: Make sure your IR LED and IR Detector are facing each other (there is a bump on the front).
Part 4: Programming an Infrared Switch	Program an Infrared Switch Write a program that changes the built-in LED state (toggle on/off) when the path between the Infrared LED and Infrared Detector is blocked. When the path is no longer blocked the LED does not change. The Arduino IDE has example code on how to turn on and off the built-in LED. You can find it in `File > Examples > 01.Basics > Blink`
Check-in	Check-in The goal is for you to have the Infrared Switch working by the check-in. It's okay if you don't, just submit a check-in (video&doc) of what you have done so far and you'll receive 75% on the check-in (-2.5% of your project grade). You can only turn in extensions if your check-in is submitted on time and all steps have been completed. Submit your code on Filer Submit your arduino code in a folder titled `[your username]_[your partner's username]_L01` (with your colby username, mine would be `hewolfe_L01`) on filer. Connect to Filer --> Courses Connect to Filer and navigate to `/Courses/CS353J_A_JP/<your username>/Private/`. Create a folder called `Projects`, inside that folder create the folder `[your username]_[your partner's username]_L01` Copy your latest lab code inside `[your username]_[your partner's username]_L01`. Submit a video and Check-in document on Google Classroom Upload a 0.5-2 minute Documentation Video with narration. Show that by blocking the IR Sensor the onboard LED turns on and off. Say what you are doing while you are doing it. Attach a Google Doc Check-in which includes: Photo of circuit: Clear photo of the circuit in which the wiring is clearly visible, wired correctly. Video Description Paragraph: 2-5 sentences describing what is happening in the video. If complete: How does it work? If incomplete: What is the current issue? Where are you stuck? Project Idea: 2-5 sentences describing an idea for a project that incorporates the IR detector and IR LED. What is it? How would you implement it?