[Lab] ws2812b LEDs

[Richard Sloan]

At full 255,255,255 they are very bright.... so less is not that bad :-)

R.



On Thu, Jun 5, 2014 at 5:04 PM, Richard Sloan <rsloan at themindfactory.com>
wrote:

> The 2812B will draw 60mA when full RGB (white) is 255,255,255
> Most Audruino can do 100-150mA, some more.... but that is at most 2-3
> leds, so if 2-3 is your goal your fine. If you need more either drive them
> less 128,128,128 and they will draw no more than 30mA 32,32,32 and they
> draw 8mA
> Or just add a seperate 5V supply for them as Janick said
> I think the 1K he mentioned is on the data line, if you put it on the 5V
> line it would limit current to 5ma and you would not get very much
> brightness from them.
>
>
> R.
>
>
> On Thu, Jun 5, 2014 at 3:30 PM, Janick Bergeron <janick at bergeron.com>
> wrote:
>
>> The LEDs should be connected in series so the Arduino will only have to
>> drive one input regardless of the length of the strip. Adafruit recommends
>> putting a 1kOhm resistor in series to limit the current.
>>
>> For the power input, you should use a separate 5V supply, with a common
>> ground with the Arduino. Again, AdaFruit recommends putting a 1mF capacitor
>> across the power supply output to protect the strip.
>>
>>
>> Jun 5, 2014 12:47:17 PM, henri.kuschkowitz at gmail.com wrote:
>> Check the amperage of the arduino you are using and review what the max
>> amperage for each ws2812b is when they’re full power (aka white) that will
>> tell you how many you will be able to run at once.
>> > Henri
>> >
>> >On June 5, 2014 at 12:21:57 PM, Darcy Whyte (darcy at inventorartist.com)
>> wrote:
>>
>> >
>>
>>
>>
>>
>>
>>
>> I should be okay to run few of those LEDs off
>> Arduino's 5V out right? (The arduino is plugged into
>> 9V....
>> >
>>
>>
>> >
>>
>>
>> >
>>
>> --
>> Darcy Whyte
>>
>> >
>> Art+ inventorArtist.com | Aviation rubber-power.com
>> Contact: darcy at inventorArtist.com | 613-563-3634 by
>> appointment (no text)
>>
>>
>>
>> >
>>
>>
>>
>>
>>
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