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NeoPixel Stick Figure Suit power question
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NeoPixel Stick Figure Suit power question

by mrseemoo on Tue Sep 21, 2021 12:46 am

Hi,

For Halloween, I'm planning on building a NeoPixel Strip Stick figure suit.

I figure about ~5m of 30/m Neopixel strip would work well.

So, using Adafruit's Neopixel power guide, I'm arriving at the following requirement:

5*30 = 150 -> 150 NeoPixels × 20 mA ÷ 1,000 = 3 Amps minimum.

That's the most Neopixels I've used in a wearable project and I could use some guidance.

Would the following battery "Lithium Ion Battery Pack - 3.7V 6600mAh" (https://www.adafruit.com/product/353#technical-details) work to power this?
Also, could I use this charger (https://www.adafruit.com/product/4410) to charge it?
Any better battery suggestions to power this project?

I have a feeling if I only have one power input point, the strip would fade towards the end. To solve this, is the solution to just have multiple attach points to the same battery in different spots of the strip?

Thanks a lot for any advice. Much appreciated.

mrseemoo
 
Posts: 5
Joined: Thu Sep 21, 2017 3:10 am

Re: NeoPixel Stick Figure Suit power question

by adafruit_support_bill on Tue Sep 21, 2021 5:22 am

The 6600mAh battery is capable of up to 3.3A continuous discharge. The Micro-LiPo charger is capable of charging it. But it will take a while since the charge rate for that charger is 100mA (it can be re-configured to 500mA). If charging speed is an issue, you might want to consider something like this which will do up to 1000mA : https://www.adafruit.com/product/280

Also have a look at this guide: https://learn.adafruit.com/sipping-power-with-neopixels
It has a lot of practical information regarding efficiently powering neopixel projects - especially wearable projects.

adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: NeoPixel Stick Figure Suit power question

by mrseemoo on Tue Sep 21, 2021 4:20 pm

Thank you for the quick and very helpful reply.

After you pointing it out, I found the listed 3.3A continuous discharge of the 6600mAh listed in the Specs.

Is there a way to calculate the continuous discharge of a battery where it's not listed? For example (https://www.adafruit.com/product/328)? Thanks again.

mrseemoo
 
Posts: 5
Joined: Thu Sep 21, 2017 3:10 am

Re: NeoPixel Stick Figure Suit power question

by adafruit_support_bill on Tue Sep 21, 2021 8:58 pm

It is listed on line 8 of the spec sheet: 1500mA - https://cdn-shop.adafruit.com/product-f ... 190510.pdf

adafruit_support_bill
 
Posts: 82178
Joined: Sat Feb 07, 2009 10:11 am

Please be positive and constructive with your questions and comments.