tutorials:products:rgbledpixel:index.html
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
tutorials:products:rgbledpixel:index.html [2011/08/04 02:22] ladyada [Wiring] |
tutorials:products:rgbledpixel:index.html [2012/01/25 19:04] ladyada [Powering] |
||
|---|---|---|---|
| Line 6: | Line 6: | ||
| - | We have two types of RGB pixels, 12mm and 20mm. They have the same controller chip and use the same power but the LED and shape differs. | + | We have **three** types of RGB pixels, 12mm round, 20mm round and 36mm square. They have the same controller chip and use the same power but the LED type, number and shape differs. |
| Line 13: | Line 13: | ||
| - | *20mm or 12mm diameter waterproof pixels | + | *20mm or 12mm diameter round or 36mm square waterproof pixels |
| *Approx 3" apart on 4 pin strand | *Approx 3" apart on 4 pin strand | ||
| - | * 20mm pixels are LPD6803 type only. 12mm may be either WS2801/LPD6803 (we switched to the superior WS2801 pixels mid July 2011) | + | *20mm pixels are LPD6803 type only. 12mm may be either WS2801/LPD6803 (we switched to the superior WS2801 pixels mid July 2011). 36mm square are WS2801 type. |
| *LPD6803 pixels have 15 bit color (5 bits per LED, 3 LEDs per pixel) | *LPD6803 pixels have 15 bit color (5 bits per LED, 3 LEDs per pixel) | ||
| *WS2801 pixels have 24 bit color (8 bits per LED, 3 LEDs per pixel) | *WS2801 pixels have 24 bit color (8 bits per LED, 3 LEDs per pixel) | ||
| - | *5V power, 60mA maximum per pixel (all LEDs on, full white) | + | *Round pixels are **5V** power, 60mA maximum per pixel (all LEDs on, full white) |
| + | *Square pixels are **12V** power, 120mA maximum per pixel (all LEDs on, full white) | ||
| *2-pin SPI-like protocol | *2-pin SPI-like protocol | ||
| *[[http://www.adafruit.com/datasheets/LPD6803.pdf|LPD6803 Datasheet]] and [[http://www.adafruit.com/datasheets/WS2801.pdf|WS2801 Datasheet]] | *[[http://www.adafruit.com/datasheets/LPD6803.pdf|LPD6803 Datasheet]] and [[http://www.adafruit.com/datasheets/WS2801.pdf|WS2801 Datasheet]] | ||
| Line 29: | Line 30: | ||
| {{flickrvid>5262163094}} | {{flickrvid>5262163094}} | ||
| + | Here is a video showing the 36mm square pixels | ||
| + | {{flickrvid>6761457165}} | ||
| ==== 20mm Pixels ==== | ==== 20mm Pixels ==== | ||
| Line 55: | Line 58: | ||
| + | ==== 36mm Square Pixels ==== | ||
| + | {{ :tutorials:products:rgbledpixel:id683_lrg.jpg?500 |}} | ||
| + | |||
| + | |||
| + | The 36mm square pixels are the biggest and brightest. They have 4 LEDs total and come in a flat metal square 'plate' that is flooded with epoxy. They require 12VDC power and can draw up to 120mA per pixel (there are two sets of two RGB LEDs connected in parallel for two 60mA draw from 12VDC). | ||
| ==== Pixel spacing ==== | ==== Pixel spacing ==== | ||
| Line 135: | Line 143: | ||
| - | ==== Powering ==== | + | ==== Powering 12mm/20mm pixels ==== |
| Line 142: | Line 150: | ||
| - | Each RGB LED pixel can draw up to 60mA from a 5V supply. That means a strand of 20 can use up to 1.2 Amps, a strand of 25 can use up to 1.5A. Of course this is assuming all the LEDs are on. If you keep most of the LEDs off (by color swirling or patterns) the power usage can be a 1/3 or less. | + | Each single RGB LED pixel (such as the 12mm or 20mm LED rubber pixels) can draw up to 60mA from a 5V supply. That means a strand of 20 can use up to 1.2 Amps, a strand of 25 can use up to 1.5A. Of course this is assuming all the LEDs are on. If you keep most of the LEDs off (by color swirling or patterns) the power usage can be a 1/3 or less. |
| Line 152: | Line 160: | ||
| As shown below, connect ground to both your supply and logic microcontroller. Then connect the 5V pin to the power supply. A large capacitor (1000uF or so) is a nice addition to keep ripple down. | As shown below, connect ground to both your supply and logic microcontroller. Then connect the 5V pin to the power supply. A large capacitor (1000uF or so) is a nice addition to keep ripple down. | ||
| + | ==== Powering 36mm pixels ==== | ||
| + | |||
| + | |||
| + | The 36mm square pixels are beefier than the 12mm/20mm ones and can draw up to 120mA from a 12V supply. That means a strand of 20 can use up to **2.4** Amps. Of course this is assuming all the LEDs are on. If you keep most of the LEDs off (by color swirling or patterns) the power usage can be a 1/3 or less. | ||
| + | |||
| + | |||
| + | |||
| + | We suggest a nice switching supply for driving LED dots,[[https://www.adafruit.com/products/352| such as this 12V 5Amp switching supply ]] for a strand or two, or [[http://www.instructables.com/pages/search/search.jsp?ie=ISO-8859-1&q=ATX|a slightly modified ATX power supply (you'll need to connect the green power line to ground but you do not need the 'loading' resistor]]) which can provide 10 Amps or more depending on the make. | ||
| + | |||
| + | |||
| + | Since the 36mm pixels are powered by 12V but use 3-5V signalling, you'll want to make sure you don't accidentally connect the 12V to your microcontroller! For that reason, the power lines are separated out. Use something like a [[https://www.adafruit.com/products/368|2.1mm DC terminal block adapter]] so that you can plug a 12VDC adapter directly in. | ||
| + | |||
| + | {{ :tutorials:products:rgbledpixel:36mmpixelterminal.jpg?500 |}} | ||
| + | The wires on the 3-JST SM connector are then connected to your microcontroller: black is ground, yellow is data and green is clock. | ||
| ==== Wiring ==== | ==== Wiring ==== | ||
/home/ladyada/public_html/wiki/data/pages/tutorials/products/rgbledpixel/index.html.txt · Last modified: 2016/01/28 18:05 (external edit)
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
