LED Strip (1138) with Microbit and other question?

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waltad
 
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LED Strip (1138) with Microbit and other question?

Post by waltad »

I have a couple of questions and greatly appreciate any help here! I am starting a project for my kids, and want to build it once completely so I can help teach them. The programming portion is easy, but working with hardware is new for me.

I have a microbit (v2) that I would like to make work with the 1138 1 meter LED strip (https://www.adafruit.com/product/1138?length=1) We've been doing other projects with the microbit and a small led strip (10 led's with neopixel library) but the new project needs (probably) the full meter. Will this controller work? If not natively, is there something cheap/easy I can get to go between the bit and the led? (So I can keep the kids in the MakeCode environment).

Additionally, I tried to hook it up tonight, but all I have is a 12v/2a power supply and will need to order the 5v3a supply (is this correct?) - this is planning for all 60 LED's to be at full brightness and white at some point.

And lastly - can someone confirm the wiring for the strip with the external supply? I have the two pin screw connector terminal.

Black on strip -> microbit ground -> power supply negative -> other black on strip.
White -> power supply positive
Red -> P0 / P1 on the microbit.

Again, thanks for the help.

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dastels
 
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Re: LED Strip (1138) with Microbit and other question?

Post by dastels »

It should work fine.

If you plan to have all 60 NeoPixels at full white you'll need ~3.6A (60mA * 60 NeoPixels), so https://www.adafruit.com/product/1466 will do the job to power the strip. See https://learn.adafruit.com/adafruit-neo ... -neopixels. Powering the strip with 5v, you'll need a level shifter as well. See https://learn.adafruit.com/adafruit-neo ... ogic-level.

For wiring, generally black is ground and red is power positive (5v in this case). But verify with the labeled connection pads at the end of the strip. E.g. https://cdn-shop.adafruit.com/970x728/1138-03.jpg.

Dave

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waltad
 
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Re: LED Strip (1138) with Microbit and other question?

Post by waltad »

Thanks for the reply Dave. I was indeed able to get it working once I got an appropriate power supply and wired it all together.

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