Page 98 - KEC Khaitan C8.2 Flipbook
P. 98
CONTROLLING OUTPUTS CHAPTER
& MANAGING TIMING B2
Learning Outcomes 95%
The student will be able to:
Explain how digital outputs function and why timing is crucial in automated systems.
Construct multi-LED circuits and manage their output using individual pins.
Design a basic Traffic Light Simulation that mimics real-world signal logic.
This lesson builds on your foundation from lesson 1, taking a closer look at controlling electronic
outputs (like LEDs) using Arduino pins. You will also learn the importance of timing for creating
predictable sequences—a core concept in many automated systems, from traffic lights to alarm
buzzers. By the end, you’ll put everything into practice by building your own mini traffic light.
DIGITAL OUTPUTS AND THEIR IMPORTANCE
UNDERSTANDING DIGITAL SIGNALS
Definition: A digital output pin can be in one of two states: HIGH (ON) or LOW (OFF).
Voltage Levels:
○ Arduino Uno uses 5V for HIGH and 0V for LOW.
Applications:
○ Powering indicators like LEDs or enabling signals to other electronic modules.
WHY OUTPUTS & TIMING MATTER
In robotics and automation, you often need to turn devices ON or OFF at specific moments:
LEDs in decorative displays.
Buzzers for alarms or signals.
Traffic Lights that cycle between red, yellow, and green.
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