16x32 LED Matrix

EL Wire/Tape/Panels, LEDs, pixels and strips, LCDs and TFTs, etc products from Adafruit

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robbiew
 
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16x32 LED Matrix

Post by robbiew »

*** EDIT ***

I just resolved the problem below. Turns out I had all the ground wires to a breadboard (per the instruction photo), but didn't actually have a ground wire from the Arduino plugged in to the board. D'oh! Replaced, everything is properly grounded -- lines removed! Works perfectly. Keeping this post in case it helps any other newbies.

----

I've followed the instructions for wiring the 16x32 LED matrix to Arduino here - https://learn.adafruit.com/32x16-32x32- ... x32-matrix -- and everything *appears* to be working, except for this glitch:

There are two horizontal rows/areas of LED that flicker like white lines -- one at the top, the other in the middle. It does this for all the example code. I've triple checked all the wiring, and it appears to be correct. You can sort of see it in this photo.

Any ideas? Thanks!
photo.JPG
photo.JPG (108.91 KiB) Viewed 608 times

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adafruit_support_rick
 
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Re: 16x32 LED Matrix

Post by adafruit_support_rick »

robbiew wrote:Keeping this post in case it helps any other newbies.
Thanks!

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pburgess
 
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Re: 16x32 LED Matrix

Post by pburgess »

Does the testcolors_16x32 example sketch flicker the same way, or is it only the double-buffered animation examples?

If it's only the animated examples: could you try downloading an earlier version of the Arduino IDE (say, 1.0.3) and see if the flickering goes away or is reduced?

http://arduino.cc/en/Main/OldSoftwareReleases

Double-buffered animation uses nearly all the Arduino's RAM, and I've observed that the core Arduino libraries use different amounts with each release; sometimes it's just too much.

thomasqbrady
 
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Re: 16x32 LED Matrix

Post by thomasqbrady »

I ordered two of these boards a couple weeks ago, on 3/26/2014: https://www.adafruit.com/products/420

One of the boards functions perfectly. The other has one quarter of the LEDs (bottom left corner) stuck red, and one quarter (the bottom right) discolored.

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adafruit_support_rick
 
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Re: 16x32 LED Matrix

Post by adafruit_support_rick »

thomasqbrady wrote:One of the boards functions perfectly. The other has one quarter of the LEDs (bottom left corner) stuck red, and one quarter (the bottom right) discolored.
Please email [email protected] with a link to this thread for a replacement matrix

tiltstern
 
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Re: 16x32 LED Matrix

Post by tiltstern »

Yes! This post totally helped this particular noobie! Thank you very much.

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dexies
 
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Re: 16x32 LED Matrix

Post by dexies »

Is it possilble to to run this led panel from a lipo battery

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dexies
 
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Re: 16x32 LED Matrix

Post by dexies »

Is it possible to to run this led panel from a lipo battery and program it using a usb chip? Is this panel readable at a distance of 40 ft or more? I am looking to use this as a banner that can be flown from a quad-copter. I have no experience with electronics other than I use them a lot. If this led panel is not suitable for my needs can someone please recommend an alternative solution? Max weight for the banner and all electronics 1/2 lb. prefer a mesh design to cut down on wind drag.
Last edited by dexies on Thu Aug 07, 2014 6:09 pm, edited 2 times in total.

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adafruit_support_rick
 
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Re: 16x32 LED Matrix

Post by adafruit_support_rick »

No. It requires a 5V 2A supply

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dexies
 
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Re: 16x32 LED Matrix

Post by dexies »

than what kind of led panel would better suit my needs?

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adafruit_support_rick
 
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Re: 16x32 LED Matrix

Post by adafruit_support_rick »

You could try one of these.

https://www.adafruit.com/products/1487

If you need more pixels, you can chain them together. They will run on 3.7V. However, you may need multiple batteries, as each 8x8 panel can draw up 2A

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dexies
 
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Re: 16x32 LED Matrix

Post by dexies »

adafruit_support_rick wrote:You could try one of these.

https://www.adafruit.com/products/1487

If you need more pixels, you can chain them together. They will run on 3.7V. However, you may need multiple batteries, as each 8x8 panel can draw up 2A
will this suit my weight requirements of less than 1/2 lb and be seen from at least 40 ft? and can it be programmed using a memory card?

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dexies
 
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Re: 16x32 LED Matrix

Post by dexies »

adafruit_support_rick wrote:You could try one of these.

https://www.adafruit.com/products/1487

If you need more pixels, you can chain them together. They will run on 3.7V. However, you may need multiple batteries, as each 8x8 panel can draw up 2A
will this suit my weight requirements of less than 1/2 lb and be seen from at least 40 ft? and can it be programmed using a memory card?

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adafruit_support_rick
 
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Re: 16x32 LED Matrix

Post by adafruit_support_rick »

This is not a big display. It is 2.8" square and weighs less than an ounce. But it is much brighter than the 16x32.
If you chained 8 of them to make 16x32, it would be just under 7 ounces.

You use the NeoMatrix library to control the NeoPixel matrix panels:
https://learn.adafruit.com/adafruit-neo ... ix-library


EDIT: actually, I just remembered we have this USB power pack, which would be enough to power the 16x32 matrix you originally asked about:
https://www.adafruit.com/product/1566

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