Who else is using Neopixels to display frequency bands using FHT?

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(Henry Birdseye Jr.) #1

Who else is using Neopixels to display frequency bands using FHT?

I have this working on a full-sized Arduino, but I want to make a portable version. Would a Flora work too? A Trinket?
http://www.youtube.com/watch?v=R7pWtNaKbVw

(Robert Atkins) #2

Go for a DFrobot Beetle. They’re tiny, Arduino Leonardo spec (32u4, 2.5k RAM), 5V and less than 8 bucks!

(Henry Birdseye Jr.) #3

This little guy?

(Andrew Tuline) #4

@Henry_Birdseye_Jr That looks like a 3rd party reseller making a markup to me.

(Marc Miller) #5

http://www.dfrobot.com/wiki/index.php/Beetle_SKU:DFR0282

http://www.dfrobot.com/index.php?route=product/product&product_id=1075&search=DFR0282&description=true#.Vf75vXPn-v2

They also sell them in a 10 pack.

(Marc Miller) #6

Also, cool, looks like you have that working rather nicely.

(Henry Birdseye Jr.) #7

Yeah, it’s Andrew’s code. I’m messing with it to make the colors blink less.
Thanx.

(Juergen Bruegl) #8

Trouble-free option is Teensy 3.1 or 3.2 (if you need more 3.3V output)
https://www.pjrc.com/teensy/teensy31.html
Also supports FHT
https://www.pjrc.com/teensy/td_libs_Audio.html

(Henry Birdseye Jr.) #9

I think the Teensy if the winner. FHT is processor intensive enough to need the extra memory and crunching power.

I still have a few hurdles to jump. Have to get a meter-long clear tube of some sort and attach it to a handle containing the electronics and battery.

Any suggestions for battery power. Something LiPo for sure.

(Andrew Tuline) #10

Depending on the number of LED’s being powered, I just use a USB power bank along with power managed FastLED code (to limit the maximum current draw).

As a result, I haven’t yet implemented power hungry portable displays.