7-segment display

Goal

Count from 0 to 9 on a segment display.

Why it matters

A digit → segments lookup table is the first digital “font”.

Steps

1. 01Add the 7-segment display.
2. 02Create const byte digits[10] with each digit pattern.
3. 03Write show(n) applying the 7 bits.
4. 04Count from 0 to 9 with a one-second pause.

Next tutorials

• PWM: dimming an LED

  Breathe an LED from 0 to 255 with analogWrite().

• Potentiometer → brightness

  Set LED brightness with the knob (10 bits to 8 bits).

• RGB LED: mixing colours

  Create any colour with three PWM channels.

• Smooth fade (sine curve)

  Make the fade look linear by using a non-linear curve.