This week's assignment required us to create a circuit with two inputs (sensors) and two outputs, then write a text-based code (without using code blocks) and build an enclosure.

While researching, I found a flower-shaped lamp, which inspired me to add a light sensor. I also included an ultrasonic sensor just for fun—to display a sentence on the LCD.

For my project, I chose to use:

• A light sensor to control a 9V lamp

• An ultrasonic sensor to interact with an LCD display

Input Components:

• LDR (Light Sensor): Detects changes in light intensity.

• Ultrasonic Sensor: Measures distance.

Output Components:

• LCD: Displays a message when the ultrasonic sensor detects a specific distance.

Microcontroller:

• Arduino Uno: Controls the entire circuit.

Tinkercad Simulation:

I used Tinkercad to test the circuit before building it physically, ensuring that no components would be damaged.

Steps:

1. Inserting Components:

   • I added the required components, including a breadboard, Arduino Uno, light sensor, 9V lamp, LCD, and ultrasonic sensor.

   • However, I faced an issue:

     • Tinkercad does not have a light sensor module or a relay module.

2. Wiring the Power Connections:

   • Connected VCC (5V) from the Arduino to the positive rail of the breadboard.

   • Connected GND from the Arduino to the negative rail of the breadboard.

3. Ultrasonic Sensor Wiring:

   • VCC → Positive rail

   • GND → Negative rail

   • Trigger Pin → Pin 3 on the Arduino

   • Echo Pin → Pin 4 on the Arduino

4. LCD Wiring (4 Pins):

   • VCC → Positive rail

   • GND → Negative rail

   • SDA → Pin A4 on the Arduino

   • SCL → Pin A5 on the Arduino

5. Light Sensor Wiring:

   • VCC → Positive rail

   • GND → Negative rail

   • Signal Pin → Pin A0 on the Arduino

6. Relay Module Issue:

   • Since Tinkercad does not have a relay module, I replaced the lamp with an LED for simulation purposes.