Arduino – how to do something useful beyond lighting up an LED

After today everyone in my robotics class will have completed their first Arduino circuit: make an LED blink. I don’t like doing things without a purpose so I want to share what you can do with an LED blinking.

A TV remote has an LED – it doesn’t deal with visible light, it uses infrared. The challenge is knowing the sequence. Each TV company uses a certain sequence of on/off. Thankfully there are people who worked out the codes and made them available!

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