What is "charlieplexing"? (a short demo using the Raspberry Pi)

What is "charlieplexing"? (a short demo using the Raspberry Pi)

While I was reading Raspberry Pi Cookbook, I came across a few things that looked interesting to demo. One of them was the concept of “charlieplexing“. On past projects, when I needed multiple LEDs (like in my Simon clone), I just connected each individual LED to its own GPIO pin.

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Connecting an Analog Joystick to the Raspberry Pi (and using it with an RGB LED to simulate a color wheel)

Connecting an Analog Joystick to the Raspberry Pi (and using it with an RGB LED to simulate a color wheel)

One of the coolest things about the Raspberry Pi is its GPIO pins. They’re just sitting there, waiting to be connected to all kinds of useful peripherals so your Pi can interact with the world around it. Power an LED to signal the user. Place a button in the

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Creating a Flickering Candle Using an RGB LED on the Raspberry Pi

Creating a Flickering Candle Using an RGB LED on the Raspberry Pi

After getting PWM (pulse-width modulation) to work with an RGB LED last week, I was trying to think of what else I could do with an LED that demonstrated changes in color as well as intensity. I’m not sure why – maybe it was because we lost power in our

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How to Use an RGB multicolor LED with Pulse Width Modulation (PWM) on the Raspberry Pi

How to Use an RGB multicolor LED with Pulse Width Modulation (PWM) on the Raspberry Pi

If you buy a kit with random LEDs, wires, switches, etc, like this one I purchased from CanaKit, you’re likely to end up with one or two of those funky little LEDs that appears to be white, and has 4 wires instead of 2. I had set mine aside

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How to Create a Raspberry Pi Virtual Machine (VM) in VirtualBox

How to Create a Raspberry Pi Virtual Machine (VM) in VirtualBox

I recently started flipping through The MagPi back-issues, and came across an article where someone talked about setting up a virtual Raspberry Pi environment. At the time he wrote his article, I don’t think the Pi was even really available to the public yet. It got me thinking though.

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