3Seven-Segment LED Count Down Timer
In this project we’ll create a simple timer that counts down from 9 to 0. This can be used in any number of useful projects!
PARTS REQUIRED
Arduino board
Breadboard
Jumper wires
Seven-segment, single-digit common-cathode LED
8 220-ohm resistors
HOW IT WORKS
A seven-segment LED display shows a single digit or character using LED segments. Each segment is an individual LED, and by controlling which segments are lit at any time, we can display numeric values. We’re using a single-digit display in this project, shown ...
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