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LEDS / DOTSTAR / STRIPS / ADAFRUIT DOTSTAR DIGITAL LED STRIP - WHITE 30 LED - PER METER
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Adafruit DotStar Digital
LED Strip - White 30
LED - Per Meter -
WHITE
PRODUCT ID: 2238
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DESCRIPTION
TECHNICAL DETAILS
LEARN
DESCRIPTION
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.
Like NeoPixels, DotStar LEDs are 5050-sized LEDs with an embedded microcontroller inside
the LED. You can set the color/brightness of each LED to 24-bit color (8 bits each red green
and blue). Each LED acts like a shift register, reading incoming color data on the input pins, and
then shifting the previous color data out on the output pin. By sending a long string of data, you
can control an infinite number of LEDs, just tack on more or cut off unwanted LEDs at the end.
The PWM is built into each LED-chip so once you set the color you can stop talking to the strip
and it will continue to PWM all the LEDs for you
However, unlike NeoPixels, these LEDs have 2 wires (input and output) for sending data - one
clock pin and one data pin. That means you need two pins, not one, to control DotStars.
Because the clock and data is seperated, you can use any processor speed or type to
control these strips, and you don't have to worry about being careful with the timing.
Hardware SPI support is handy but not required. This makes them excellent for use with any
microcontroller or microprocessor, including Arduino, Raspberry Pi, BeagleBone, Propeller,
SparkCore, and any 'raw' microcontrollers/microprocessors. It's very easy to port the library,
and you can send data to the pixels at up to 32MHz clock rate!
Another nice thing about DotStars is their high PWM rate. You only have to set the 24-bit color
data for each pixel LED once, and then the LED+built-in-chip will handle the PWMing of the red,
green and blue. On NeoPixels, this PWM rate happens 400 Hz, which works well but is noticably
at lower brightnesses and if the strip is moving in any way. DotStars have a 20 KHz PWM rate,
so even when moving the strip around, you won't see the pixelation, the color blending is very
smooth.
This is the 30 LED-per-meter version of our DotStar strips, on white flex PCB. We have 30
LED/m, 60 LED/m and 144 LED/m on both white and black flex PCB.
The strip is made of flexible PCB material, and comes with a weatherproof sheathing. You can
cut this stuff pretty easily with wire cutters, there are cut-lines every 1.3"/3.4cm (1 LED each).
Solder to the 0.1" copper pads and you're good to go. Of course, you can also connect strips
together to make them longer, just watch how much current you need! We have a 5V/2A supply
that should be able to drive 1 meter, a 5V 4A that can do a couple meters, and a 5V/10A supply
that can drive up to 10 meters (depending on use) You must use a 5V DC power supply to
power these strips, do not use higher than 6V or you can destroy the entire strip
These strips come in 5 meter reels with a 4-pin JST SM connector on each end. These strips are
sold by the meter! If you buy 5 meters at a time, you'll get full reels with two connectors. If you
buy less than 5m, you'll get a single strip, but it will be a cut piece from a reel which may or may
not have a connector on it. If the piece comes from the end of the reel, the connector may be
on the output end of the strip!
To wire up these strips we suggest picking up some JST SM plug and receptacle cables for the
signal wires For the power wires, you will also probably want a 2.1mm DC jack to wire in so you
can connect one of our 5V wall adapters to power it.
We have a tutorial showing wiring, power usage calculations, example code for usage, etc.
Please check it out!
TECHNICAL DETAILS
Revision History:
LEARN
The manufacturer of the APA102C smart LED used in this strip used to be DOTSTAR_GRB
order, and has changed in 2015 to have DOTSTAR_BRG color order and then in 2017 to
DOTSTAR_BGR . This means if you are using our DotStar library, you'll need to change the
initialization to tell it which you are using. Check the tutorial for details on how to do this! The
LED colors are otherwise identical, you just have to pipe the data to it in a slightly different
order.
Technical specs (for the strips):
Width (with weatherstripping): 14mm / 0.55"
Width (w/o weatherstripping): 10mm / 0.4"
Thickness (with weatherstripping): 4mm / 0.16"
30 LEDs per meter
Pixel pitch: 33.3mm / 1.3" between LEDs
Operating temperature: -40°C - 40°C
Storage temperature: -10°C - 50°C
Technical specs (for the LEDs):
SK9822 Datasheet
Light source: Epistar 5050 SMD LEDs
LED Brightness: Red ~600mcd, Green ~500mcd, Blue ~150mcd
Beam angle: ~160°
Max current draw per RGB LED: ~60mA (20mA max per Red, Green & Blue LED)
Note: Strips come with 4 solder points per segment, but the arrangement may vary depending
on the supplier, so please check when soldering/powering!
We have a tutorial showing wiring, power usage calculations, example code for usage, etc.
Please check it out!
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