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It acts as a "best friend" for finding errors by showing real-time data or status messages from the Arduino (e.g., "Sensor running...").
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Check for loose wires or short circuits that might be interrupting the power.
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Flexible wires used to connect different components on a breadboard or to an Arduino.
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It contains metal strips inside the plastic housing that allow electricity to flow between holes in specific rows or rails.
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It is stiff and easy to push into the breadboard holes, unlike stranded wire which can bend or fray.
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A microcontroller is a small computer on a single integrated circuit containing a processor, memory, and input/output peripherals, used to control electronic devices.
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Robotics, home automation, and smart devices (IoT).
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5V and 3.3V.
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It stands for Ground; it completes the electrical circuit allowing current to flow.
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It is the software (like a magic notebook) where you write the instructions (code) for the Arduino board.
Verify and Upload?Answer:
Verify checks the code for mistakes (compiling), while Upload sends the compiled code to the Arduino board to run.
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pinMode(9, OUTPUT);
// mean in Arduino code?Answer:
It marks the start of a comment, which is a note for humans and is ignored by the computer.
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The Trigger pin sends a sound pulse, which hits an object and bounces back. The Echo pin detects the return. The time taken is measured and converted into distance.
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Because the sound travels to the object and back (round trip). We only need the distance one way.
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Red ON (5s) -> Red OFF -> Green ON (5s) -> Green OFF -> Yellow ON (2s) -> Yellow OFF -> Repeat.
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Arduino Uno, 3 LEDs (Red, Yellow, Green), 3 Resistors (220 or 330 ohm), Breadboard, Jumper Wires, and a USB cable.
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Anode is the positive, longer leg of an LED. Cathode is the negative, shorter leg.
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It limits the current flowing through the LED to prevent it from receiving too much power and burning out.
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Size (diameter), brightness, power consumption, and beam angle.
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An Active Buzzer has a built-in oscillator and makes sound with a simple HIGH signal. A Passive Buzzer needs a changing frequency signal to produce sound and can play different tones.
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Tolerance tells you how accurate the resistor's value is. For example, a Gold band means the actual resistance can vary by ±5% from the stated value.
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Anode is the positive, longer leg of an LED. Cathode is the negative, shorter leg.
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It limits the current flowing through the LED to prevent it from receiving too much power and burning out.
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Size (diameter), brightness, power consumption, and beam angle.
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An Active Buzzer has a built-in oscillator and makes sound with a simple HIGH signal. A Passive Buzzer needs a changing frequency signal to produce sound and can play different tones.
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Tolerance tells you how accurate the resistor's value is. For example, a Gold band means the actual resistance can vary by ±5% from the stated value.
No short questions available for this section.