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256  Using Arduino / LEDs and Multiplexing / Re: Problem when expanding on the ShifOut tutorial for LEDs on: May 01, 2012, 05:24:46 pm
The more you add, the more noise will become an issue, no doubt about that !
257  Using Arduino / Motors, Mechanics, and Power / Re: Call a method during a delay using an if statement on: May 01, 2012, 01:21:53 pm
there are already loads of posts explaining it
258  Using Arduino / LEDs and Multiplexing / Re: Problem when expanding on the ShifOut tutorial for LEDs on: May 01, 2012, 11:07:42 am
Have u tried do what you was advised and connect the MOSI to the forward chips, individually to see if they work? That would definitely help you to first and foremost identify which section is causing the issues in the wiring, it seems.
You need to follow some kind of logic when re-checking all the wiring to troubleshoot.
259  Using Arduino / Motors, Mechanics, and Power / Re: Digital to Analog conversion on: May 01, 2012, 07:29:21 am
Maybe  74HC4067, 16 analogue channels ? Or others smaller like the 74HC4051 (8 channels), etc
260  Using Arduino / Motors, Mechanics, and Power / Re: Call a method during a delay using an if statement on: May 01, 2012, 07:25:14 am
As the delay tutorial explain, u cant really do anything else while the delay is active !
261  Using Arduino / Project Guidance / Re: Sound to guitar amplifier. on: May 01, 2012, 05:50:27 am
If u explain better what you want to do, schematic if you have and code, would hep, as we dont have clairvoyants here !!
262  Using Arduino / LEDs and Multiplexing / Re: Problem with MAX7219 on: May 01, 2012, 05:39:36 am
It is hard to say from the pic, but id guess i can see some cold solders there anyway. Another thing, if the caps were on the schematic, then you should use them. Might work for a couple minutes, but doesnt mean that will not blow something after a while on. wouldnt be the firsst nor the last time.
263  Using Arduino / LEDs and Multiplexing / Re: Problem when expanding on the ShifOut tutorial for LEDs on: May 01, 2012, 05:33:00 am
Remember mine wouldn't work at all until I unplugged the 5V jumper going from the arduino to the breadboard. Once I did that, I finally got life out of it. Maybe that is a clue to some other issue. Other than that, Mine is wired just like yours. How about sending COM commands to turn each one on or off individually? Would that be a simple bit of code?

You cant just chose what you feel like wiring and what not... Things have a reason to be on the schematic, including decoupling caps... Otherwise, its quite normal it wont work properly !!
264  Using Arduino / General Electronics / Re: ground loop issue on: May 01, 2012, 04:48:27 am
Ok lets clear a couple things.
I was right in what i said that depending on the version will vary from 500mA to 900mA.
USB power is quite clean compared to a cheap power adaptor kind we find on the shops built in china ( ill give u an example- same as you built something, all sounded top,  with a wall adapter, noise comes).
As said before you need a good decoupling, the cleanest psu u can get, and preferably a metal enclosure to avoid emf interference ).
Look for hot to filter hum and ground noise, as theres los of tutorials on how to, and decoupling of course !
265  Topics / Education and Teaching / Re: Understanding Arduino UNO on: April 28, 2012, 01:55:25 pm
any commercially available component (uC's or just analog electronic ones) datasheets are available online in many places. just search for it in your search motor of your preference( Google, Yahoo, etc etc). This might not be true if its proprietary  ones, in which case might or might not be available ( example, the full datasheet of the chip used in Raspeberry Pi).
266  Using Arduino / Audio / Re: Noob audio direction needed. on: April 27, 2012, 05:04:17 pm
Unless its a proof of concept kind of thing, its not really the uC for it.
267  Using Arduino / Project Guidance / Re: 24 motorized fader mixer with Arduino on: April 27, 2012, 04:52:34 pm
regarding buying faders, you can buy them from any brand that uses them on their mixers/controllers ?!? depend on what you want !
Behringer probably will be the cheapest.
268  Using Arduino / Project Guidance / Re: Arduino beginner on: April 27, 2012, 04:12:39 pm
If u havent noticed, what they saying is- Sit down, write the code yourself, and if you have problems with parts of it, come back and ask for specific questions for help.
No one else will write the code for you, if thats what you expect. Or, open your pockets and buy a well supported platform, where most of the work is half done... Even then you will need a lot of work.
Or, as someone said before- dont move and then it wont need to avoid things !
Arduino is also Synonym of lots of hard work, lots of research and lots of frustrating times ...
UNLESS YOU ARE THE FIRST TO BUILD A ROBOT THAT BUILDS ROBOTS< SO PEOPLE LIKE YOU NEVER NEED TO , AGAIN !! lol
Dont get me wrong, here, just trying to get you in the right direction.
269  Using Arduino / Programming Questions / Re: Audio Delay on: April 27, 2012, 09:52:06 am
isnt it possible to just use a slower memory type like sd cards (how fast is it actually?) and buffer the samples in the internal memory, so there is more time to save them on the external memory.

I thought that was the theory and best approach  ?!?! Or have i missed summat ?!
270  Using Arduino / Project Guidance / Re: complex project, need advices on: April 27, 2012, 09:31:10 am

This seems to be the perfect base for what you want to do. He has done a rotator but you can easy change it to arpergiate instead and also the rotator as well. Also ability to create patterns so its quite down the line you wanted innit ?
Uses the rugged midi shield http://ruggedcircuits.com/html/flexible_midi_shield.html
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