This is a really cool project from Adafruit customer Graham Perks. Full tutorial here!
For driving an array of LEDs with a Valentine’s message.
Currently this is configured for a 5×5 array of pixels.
I used Adafruit’s RGB Pixels which have a WS2801 driving them.
There’s a class (LEDFader) here which wraps the WS2801 library and provides the ability to animate pixel color changes, which makes for a smoother color flow. Rather than the pixel snapping from color to color, you can specify a duration to setPixelColor over which the pixel’s color will animate.
For the hardware, I followed http://www.instructables.com/id/Yet-Another-Daft-Punk-Coffee-TableDisplay/#step0, though of course I replaced the individual LEDs with the Pixels. I also thickened the box, by 3cm; this added a hidden back area with space for the wiring and arduino.
I ordered a translucent cover from Blick art materials (failed to find anything locally). http://www.dickblick.com/products/grafix-drafting-film/. I found the 2-sided version of this better at hiding the LEDs within, there’s more blurring going on.
Featured Adafruit Products!
12mm Diffused Thin Digital RGB LED Pixels (Strand of 25) – WS2801 – RGB Pixels are digitally-controllable lights you can set to any color, or animate. Each RGB LED and controller chip is molded into a ‘dot’ of silicone. The dots are weatherproof and rugged. There are four flanges molded in so that you can ‘push’ them into a 12mm drill hole in any material up to 1.5mm/0.06″ thick. They’re typically used to make outdoor signs. We also have flat-backed pixels that are essentially the same, but are not as long and thin. Read more.
5V 2A (2000mA) switching power supply – UL Listed – Need a lot of 5V power? This switching supply gives a clean regulated 5V output at up to 2000mA. 110 or 240 input, so it works in any country. The plugs are “US 2-prong” style so you may need a plug adapter, but you can pick one up at any hardware store for a $1 or so.
Happy Valentine’s Day from Adafruit! Today we are highlighting our favorite heart-shaped electronics projects. We have lots of excellent projects to let your loved one know that you care. Be sure to check out our gift guide as well!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
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