41 lines
1.4 KiB
Markdown
41 lines
1.4 KiB
Markdown
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Holiday Lights
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Some twinkling lights for your tree/menorah/office/door/roof/habitrail.
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Materials
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Uses WS2811 lights, available from Adafruit and fine retailers worldwide.
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If you've got more than 100 lights in a string,
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you're probably also going to want an external 5v DC power supply.
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I found a good 10A power supply for about $12 on Amazon.
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You can probably salvage one from some old thing.
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If you have under 80 lights, you can use an Adafruit Trinket.
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I used an Adafruit Pro Trinket for mine, which has 150+ lights.
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(It's an issue of RAM).
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Of course, a standard Arduino will work just fine too!
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Setup
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-------
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Plug your lights into pin 6 (or whatever you set `PIN` to in the code).
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Set `NUM_LEDS` in the code to how many are in your strip.
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Give the strip power and ground.
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If you have more than about 80 LEDs, you might need to provide an external
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5v power supply, since USB can only provide 2 amps.
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You can plug the LED strip into the +5v on the power supply;
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You can power your microcontroller from the beefier power supply, too,
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so you don't have to run USB just to power the microcontroller.
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This was coded to color-correct a specific type of GRB LEDs on wires I got from Amazon.
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It's coded to match the lights we already have, which are biased toward yellow and amber.
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Some of the lights are wired differently and the colors are going to be wrong.
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Play around, commenting out all but one color, to see if it's right.
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