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Engaging young minds in STEM outreach programs is a rewarding endeavor, whether the engagement involves the simplest or most advanced activities =). One activity that consistently finds its place in almost every UMP STEM Lab module, especially in programming, physical computing and robotics, is the humble LED. Let’s delve into the journey of LEDs in STEM education and how these tiny diodes offer more than meets the eye.
The Simplicity of LED Control – At first glance, controlling an LED appears to be a straightforward task. Playing around with various control statements to manipulate the LED’s output, experimenting with multiple LEDs, different colors, and sequences – it all seems like child’s play. After all, there are only two states for an LED: on or off, making it an ideal starting point for novice learners. Even the introduction of Pulse Width Modulation (PWM) to control the LED’s intensity doesn’t complicate matters too much.
However, a memorable incident served as a turning point in my perspective. A young participant in UMP STEM Lab – back in 2018, yes I remember dates well :p, having completed his assignment, looked at the blinking LED and asked a simple question, “So what? The LED blinks.” This innocent query prompted a deeper reflection on the true potential of LEDs beyond mere on-off cycles.
Beyond blinking lights- One can program LED to convey information. While it’s true that LEDs can blink, their utility extends far beyond this basic function. In reality, LEDs can convey a wealth of information through various patterns, colors, and sequences. Consider the indicator lights in an airplane operation – each different light carries a distinct meaning. From indicating engine status to signaling the readiness for takeoff, LEDs play a crucial role in communication.
This video, beautifully illustrates the significance of lights in conveying information. In an airplane cockpit, the combination of different lights serves as a visual language for the pilot, communicating critical details about the aircraft’s status and operation.
The seemingly simple light (often represented by LEDs) holds the power to convey intricate information, making it a valuable tool in STEM education. Beyond the basics of on-off control, the exploration of LED applications opens doors to a deeper understanding of electronics, programming, and the nuanced language of visual communication. As educators and enthusiasts, let’s continue to unveil the complexity behind the blink and inspire the next generation of problem solvers.
