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POV Pixel Globe #piday #raspberrypi @Raspberry_Pi

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From Evan via hackaday.io:

LEDs that spin and turn on and off very fast.

E155 final project @ Harvey Mudd College.

The LEDs are driven by a Raspberry Pi and the motor is driven by a PI control loop written in Verilog for an FPGA.

To my knowledge the first “pixel globe” implementation with APA102 LEDs.

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Featured Adafruit Products!

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Adafruit Perma-Proto Half-sized Breadboard PCB – 3 Pack!: Customers have asked us to carry basic perf-board, but we never liked the look of most basic perf: its always crummy quality, with pads that flake off and no labeling. Then we thought about how people actually prototype – usually starting with a solderless breadboard and then transferring the parts to a more permanent PCB. That’s when we realized what people would really like is a proto board that makes it easy! (read more)


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Adafruit DotStar Digital LED Strip – Black 144 LED/m – 0.5 Meter – BLACK: Move over NeoPixels, there’s a new LED strip in town! These fancy new DotStar LED strips are a great upgrade for people who have loved and used NeoPixel strips for a few years but want something even better. DotStar LEDs use generic 2-wire SPI, so you can push data much faster than with the NeoPixel 800 KHz protocol and there’s no specific timing required. They also have much higher PWM refresh rates, so you can do Persistence-of-Vision (POV) and have less flickering, particularly at low brightness levels. (read more)


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