How many Neopixels can a Gemma support
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- leafOnTheWind
- Posts: 2
- Joined: Mon Jun 08, 2015 3:32 pm
How many Neopixels can a Gemma support
Hi, I am getting LED's for a project of mine and I was wondering how many NeoPixels a single Gemma can support. From the "Gemma-Powered NeoPixel LED Sound Reactive Drums" guid, it seems as if a single Gemma can support at least a metre of whatever density NeoPixel strip is being used but at the same time, the product description says to be mindful of the memory allocation for how many NeoPixels are being used. My hope is that a single Gemma could support 2 metres of the lowest density NeoPixels. Thanks!
- Franklin97355
- Posts: 23911
- Joined: Mon Apr 21, 2008 2:33 pm
Re: How many Neopixels can a Gemma support
do you mean 60 pixels?2 metres of the lowest density NeoPixels.
- leafOnTheWind
- Posts: 2
- Joined: Mon Jun 08, 2015 3:32 pm
Re: How many Neopixels can a Gemma support
The 30 LED strips:
http://www.adafruit.com/products/1376
http://www.adafruit.com/products/1376
- Franklin97355
- Posts: 23911
- Joined: Mon Apr 21, 2008 2:33 pm
Re: How many Neopixels can a Gemma support
You would want to power the strip directly from 5 volts but for the controls the Gemma should be able to handle it.
- Disciple
- Posts: 852
- Joined: Tue Jan 06, 2015 8:13 pm
Re: How many Neopixels can a Gemma support
I tested a Trinket 5V with a random color wave sketch up to the nearest dozen, and it controlled 108 pixels no problem. Not a Gemma, but close enough? Plenty of available current was a definite must.
@Engineer: Wouldn't 3V or 3.7V power for the NeoPixels be a better match for Gemma's logic?
Hallelujah!
Disciple
@Engineer: Wouldn't 3V or 3.7V power for the NeoPixels be a better match for Gemma's logic?
Hallelujah!
Disciple
Please be positive and constructive with your questions and comments.