Arduino micro connected to 8x8 led matrix backpack
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Please be positive and constructive with your questions and comments.
- adafruit_support_rick
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Re: Arduino micro connected to 8x8 led matrix backpack
You don't have to change anything.
- yousefsahebj
- Posts: 26
- Joined: Mon Oct 27, 2014 12:01 am
Re: Arduino micro connected to 8x8 led matrix backpack
I tried using a signal line in ( rca or Aux ) connected ground to ground and positive to A0 , results were strange. How would you go about solving this problem ?
- yousefsahebj
- Posts: 26
- Joined: Mon Oct 27, 2014 12:01 am
Re: Arduino micro connected to 8x8 led matrix backpack
By strange meaning , whenever i touched the speaker wires , i got results . i connected the arduino to the rca signal going into the amplifier , and when i touched the wires coming out of the amplifier , it showed partially random things. Im guessing my hand was some sort of connection between the wires.
- pburgess
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- Joined: Sun Oct 26, 2008 2:29 am
Re: Arduino micro connected to 8x8 led matrix backpack
Line-in is mostly a hardware problem, not software. You'll need some additional components to handle the DC offset difference between the audio source and Arduino.
Found a simple example one here:
https://github.com/fadookie/Triggerboy/wiki/Hardware
Just need a couple changes to apply this to your project:
- Connect to analog pin 0 instead of pin 3 as they show
- Connect to +3.3V instead of +5V
Found a simple example one here:
https://github.com/fadookie/Triggerboy/wiki/Hardware
Just need a couple changes to apply this to your project:
- Connect to analog pin 0 instead of pin 3 as they show
- Connect to +3.3V instead of +5V
- yousefsahebj
- Posts: 26
- Joined: Mon Oct 27, 2014 12:01 am
Re: Arduino micro connected to 8x8 led matrix backpack
Thank you everyone for all the help, i got the parts and i will attempt to assemble. i will let you know how it goes !!
- yousefsahebj
- Posts: 26
- Joined: Mon Oct 27, 2014 12:01 am
Re: Arduino micro connected to 8x8 led matrix backpack
Hello,
No results :( i built the circuit and did not work . any suggestions ? very hard to post pictures that make sense .
hope the pictures help, i tried to draw what i did on one of the pictures
No results :( i built the circuit and did not work . any suggestions ? very hard to post pictures that make sense .
hope the pictures help, i tried to draw what i did on one of the pictures
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- yousefsahebj
- Posts: 26
- Joined: Mon Oct 27, 2014 12:01 am
Re: Arduino micro connected to 8x8 led matrix backpack
UPDATE :
After playing around with it for a while, somehow it worked.
What changed : i connected the lines from the offset ( AUX in) to an amplifier boards channel inputs. Specifically the adafruit 20watt amplifier board. My guess is the signal is some how boosted ? maybe.
Overall i did not touch the DC offset circuit , and tried a lot of different things. Im happy its working however, thanks to all the great people who helped me along the way.
Only thing that is still a tad bit annoying is the fact that the volume has to be fully cranked up for any good visual results. Is there a possible way around that ? maybe change the values in the software or modify the circuit?
After playing around with it for a while, somehow it worked.
What changed : i connected the lines from the offset ( AUX in) to an amplifier boards channel inputs. Specifically the adafruit 20watt amplifier board. My guess is the signal is some how boosted ? maybe.
Overall i did not touch the DC offset circuit , and tried a lot of different things. Im happy its working however, thanks to all the great people who helped me along the way.
Only thing that is still a tad bit annoying is the fact that the volume has to be fully cranked up for any good visual results. Is there a possible way around that ? maybe change the values in the software or modify the circuit?
Please be positive and constructive with your questions and comments.