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46  Using Arduino / General Electronics / Re: best & strongest way to connect arduino for a permanent exhibition on: March 15, 2011, 03:46:05 am
thank a lot for all your informations & experiencies!
I'll probably use a box and that one will be glued on a flat surface and won't move.

about making my own boards, it is a bit too late in the process.

about pull down resistor & termination resistor.
as I'll only use analog connection, do I need them? or are shielded wires enough ?
47  Using Arduino / General Electronics / Re: best & strongest way to connect arduino for a permanent exhibition on: March 14, 2011, 05:10:36 pm
hello and thanks A LOT for your interesting post.

I'll only need too read voltage from IR distance sensor which will be supplied by a special adapter (I need 20 sensors which would be around 2A for the whole)
But those wires could be around 10m (maxi)
This will be only analog signals so... I don't know if I'd need pull up/down resistor or termination ones.
Maybe you could tell me.


About connectors on the arduino side, I thought about glueing them.
I'll probably use a box like that: http://www.smartprj.com/catalog/index.php?main_page=product_info&products_id=9
any ideas about connectors solid & robust ?
48  Using Arduino / General Electronics / best & strongest way to connect arduino for a permanent exhibition on: March 14, 2011, 03:28:16 pm
hello,
working on a permanent exhibition and including arduino UNO boards inside, I'd need to know what would be the best (permanent) connectors or what would be the best way to connect permanently long wires to the board.

I thought about crimp connectors or other ones but I'd probably have to glue them no?

About wires, we'd use long wires and I guess shielded wires would be the best way.

any ideas/experiencies/links would be appreciate.

all the best,
49  Using Arduino / Audio / Re: Designing an open-source synth and looking for the best architecture on: February 27, 2011, 11:51:50 am
hi william,
I'll consider your advices as precious ones!!!

arm9 samsung s3c2440 seems to be a nice & powerful beast.

c++ and lightest libs will be used.
50  Using Arduino / Audio / Re: Designing an open-source synth and looking for the best architecture on: February 27, 2011, 11:22:53 am
yes
I totally agree.
I intend to build/sell that under a CC license as an open-source hardware.

But, really, it will break the line and make the buzz.
51  Using Arduino / Audio / Re: Designing an open-source synth and looking for the best architecture on: February 27, 2011, 11:09:17 am
hello,
thanks a lot
it is very inspiring & interesting.
I almost decided to use a 32bit processor, finally.
If anyone is interested, I'll post everything on designthemedia.com/blog
52  Using Arduino / Sensors / Re: Parallax RFID Read/Write Module 28440 on: February 24, 2011, 06:55:57 am
about the write part?
I'm designing a patch in max/msp to encode bytes on rfid tags.

do you have an example of code to write on rfid tags from arduino?
53  Using Arduino / Audio / Re: Converting WAV to C - not working... on: February 23, 2011, 10:41:36 am
ok smiley
how about using real time sample reading from externa memory?
could it work?
54  Using Arduino / Audio / Re: Designing an open-source synth and looking for the best architecture on: February 23, 2011, 04:28:12 am
hello all,
and I have firstly to thank you a lot for this debate which is very interesting and instructive for me.
I'm at the very beginning of the project, and I cand choose the right route before prototyping anything else.

8 bits wouldn't be a problem for me
I won't make an hifi hardware
It would be consiously cheap & raw.
I love the arduino idea because it is a module I could have for cheap price.
I can also rebuild it on an only one PCB (I have those skills) but I'm not sure it will be the right ratio between time spent / cheapness / reliability (soldering smd is difficult for me) etc.


I'll look at the propeller right now!

About memory, I planned to add memory to this system.


So if I consider 8bits is ok, memory is added, the "only" problem would be the speed.
At the maximum consumption of job time for the processor, there would be:
- MIDI listening (notes come from the computer, the keayboard)
- one waveform playing (monophonic)
- one LFO modulating 1 or 2 parameters
- distorsion fx (hardware probably I guess!)
- delay fx (hardware too ; but it is an option and not sure yet about that)

The sequencer could be only an array read for playing notes... I guess it wouldn't be cpu killing.

Do you think arduino could process that?
The next step would be prototyping it on my ... arduino. I have one.But no DACs, no buffers yet.
55  Using Arduino / Audio / Re: Designing an open-source synth and looking for the best architecture on: February 22, 2011, 10:54:16 am
hello WilliamK,
thanks a lot for your answer.

I planned to make a shield, bigger than arduino itself, where I'll put every other components (filter, DAC, buffers, pots, muxer/demuxer etc)
What would be the platform you'd advice me ?

some people adviced me to build my own.
I could.
But really, I love the idea of modularity and I'd prefer to use the arduino as-it-is.

any advices?
56  Using Arduino / General Electronics / Re: 32bit AVR arduino ? on: February 22, 2011, 10:49:05 am
hello westfw, and thanks a lot for your answer.
I'm just trying to target the best paltform for my open source hardware synth: http://arduino.cc/forum/index.php/topic,53074.msg379063.html#msg379063
57  Using Arduino / Audio / Re: audio buffers ? on: February 22, 2011, 10:48:29 am
hi both mate smiley

thanks a lot
now, it is clear in my head.

if you're interested, I'm currently designing an open-source sound machine: http://arduino.cc/forum/index.php/topic,53074.msg379063.html#msg379063
58  Using Arduino / Audio / audio buffers ? on: February 21, 2011, 05:15:31 pm
hello,
very new to arduino / audio circuits (I'm more in interfacing and protocols til today :p), I'd like to figure out the process from outputs pins to speaker.

is it:
arduino pins output ====> DAC ====> buffer ====> speaker ?

I 'd like to understand why these buffers are required and if I'd need a kind of anti-aliasing filter or not?

all the best,
59  Using Arduino / Audio / Re: Converting WAV to C - not working... on: February 21, 2011, 05:10:53 pm
interested too smiley
did you succeed?
60  Using Arduino / Audio / Re: Audio Input on: February 21, 2011, 03:54:25 pm
interested too.
my project of open-source synth would involve an additional audio input that could be process by the little fx unit smiley
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