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Mini Skinny NeoPixels - 35 mA or 60 mA?
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Mini Skinny NeoPixels - 35 mA or 60 mA?

by seefar on Fri Aug 02, 2019 4:45 pm

Hi,

I wanted to double check, before ordering -

Articles in the learning center suggest the Mini Skinny NeoPixel strips as a lower power option at 35 mA/pixel -
https://learn.adafruit.com/sipping-powe ... s/insights

But it looks like the product page notes them as being 60 mA/pixel -
https://www.adafruit.com/product/2964#technical-details

Which one is currently correct?

Thanks!

seefar
 
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Re: Mini Skinny NeoPixels - 35 mA or 60 mA?

by adafruit_support_mike on Mon Aug 05, 2019 4:32 pm

Both are estimates.

The 60mA value comes from information in the datasheet for the PWM LED driver, and is a worst-case estimate. The 35mA one comes from an average of measured values from projects using the pixels, and is a nominal-case estimate.

If you’re doing power calculations, especially to select a power supply, it’s best to use the worst-case estimate. Circuits work well when the power source can deliver more current than the circuit needs. A circuit whose power source can’t deliver quite as much current as the load demands can exhibit all sorts of flakiness though.

Estimates are no substitute for taking your own measurements with the pixels running the way you want them to though.

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Re: Mini Skinny NeoPixels - 35 mA or 60 mA?

by seefar on Mon Aug 05, 2019 4:48 pm

Thanks Mike.

So is the worst case estimate for these the same as the standard NeoPixel strands then (they're only for size, not power savings)?

seefar
 
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Re: Mini Skinny NeoPixels - 35 mA or 60 mA?

by adafruit_support_mike on Tue Aug 06, 2019 9:06 pm

Yes.

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Re: Mini Skinny NeoPixels - 35 mA or 60 mA?

by seefar on Wed Aug 07, 2019 12:25 pm

Thanks Mike.

Could someone update this learning article to avoid confusion later, if the current product is 60 mA max?

https://learn.adafruit.com/sipping-powe ... s/insights

I originally purchased the mini version based on the recommendations there.

Thanks again,
Clayton

seefar
 
Posts: 13
Joined: Fri Aug 02, 2019 4:34 pm

Please be positive and constructive with your questions and comments.