The code consists of 11 functions, one for each digit 0-9 and a reset. Each function has 4 digitalOutput commands with the combination of lights for the digit in binary. They all take 1 integer argument for the delay between the digits.

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🛠️ เจาะลึกเบื้องหลังการทำงาน (Deep Dive / Technical Analysis)

The 7-Segment Display is the building block of digital clocks, fuel pumps, and calculators. It looks like a single component, but it's actually seven individual LEDs arranged in a specific pattern.

How It Works

Each segment is labeled with a letter from A to G.

• The Connection: By turning on specific combinations of pins, the Arduino "draws" numbers. For example, to show the number "1," you light up segments B and C.
• Common Pin: These displays are either Common Anode (all LEDs share a + pin) or Common Cathode (all share a - pin).

Hardware List

• Arduino (any model): To toggle the segments.
• 7-Segment Display (Single Digit): Your numerical output.
• 220-ohm Resistors (x7): It is vital to use a resistor on every segment to prevent burning out the display.
• Breadboard and Jumper Wires.

Software Logic

In the code, you'll learn about Arrays or Switch Statements. Instead of writing 7 lines of code for every number, you can create a single function that knows which pins to turn on for any digit from 0 to 9, making your code clean and efficient.