Show Posts
Pages: 1 ... 61 62 [63] 64 65 ... 105
931  General Category / General Discussion / EagleCAD: Combining packages with one symbol ... (SOLVED) on: February 19, 2012, 07:01:00 pm
NEVERMIND!  Just had my DUH moment of the day!

I'm trying to consolidate the different packages I have for a Mega328P by using the same symbol and I'm having some issues.  The PDIP package has 28 pins, TQFN has 32, and the MLF technicaly has 33 if you count the pad underneath.  Is it possible to put these all in one library?  I hate having to have separate libraries with specific naming conventions, like Mega328P-PDIP28.lbr, Mega328-TQFN32.lbr, and Mega328-MLF32.lbr ...
932  Using Arduino / LEDs and Multiplexing / Re: Arduiono + MAX7221 trouble... leds not bright? on: February 19, 2012, 03:16:59 am
I would definitely feed the full 5V to the MAX7221, not 3V.
933  Using Arduino / Networking, Protocols, and Devices / Re: Digi XBee versus Nordic RF on: February 17, 2012, 04:45:01 pm
The thing is, while I can scan when it's empty, it will only pick up the WiFi signal.  However, on a performance night, it will be filled with everyone and their grandma, each with a cellular device of sorts.  Some which will connect to the local WiFi and others which will be actively seeking a signal, and those people who will bring in a bluetooth headset.  And while we ask people to shut things off, that never happens.

So, what I see on an empty room will be completely pointless compared to a full performance when it's filled and the sound system is turned on.  And I can't walk around and scan at that time. smiley
934  Using Arduino / LEDs and Multiplexing / Re: Arduiono + MAX7221 trouble... leds not bright? on: February 17, 2012, 01:52:33 pm
CrossRoads, he is, technically, only feeding 20mA to each LED.  The 5050 LEDs are actually 3 separate LEDs in one 6-pin package; 3 cathodes, 3 anodes.  He just bridge two cathodes together and the matching anodes together and using that as a single point connection.  Basically, in simple form, you're looking at 2 LEDs in parallel being fed off of one DIG and one SEG pin on the MAX7221.  Feeding the whole thing 40mA from the MAX7221, so each LED is only receiving 20mA.  They are rated at 20mA typical (some are 30mA).

xl97, do yourself a favor, take ONE brand new LED.  Do NOT bridge any pins on it.  Instead,wire it directly to the 5V and GND pins of your controller (with appropriate series resistor for 15-20mA of course.)  Check the brightness, and remember that.

Now, do the same thing but use the MA.  Enable one DIG and one SEG pin on it, and set the resistor for the appropriate value.  Now manually connect the DIG and SEG pins to a single channel on the LED.  See if that lights up as bright as before.
935  Using Arduino / Networking, Protocols, and Devices / Re: Digi XBee versus Nordic RF on: February 17, 2012, 01:13:56 pm
Yeah, I'm thinking I may just have to build up a test unit and go sit in there and test it from various locations within the auditorium.  I mean, if the computer has to live near the stage, then so be it.  I would rather it doesn't, but one can't have *everything* all the time, right? smiley

Anyway, thanks for the suggestions!
936  Using Arduino / Networking, Protocols, and Devices / Re: Digi XBee versus Nordic RF on: February 16, 2012, 10:49:04 pm
Well, there in lies the problem.  The stage IS surrounded by WiFi antennas.  And it is extremely possible that people will have bluetooth ear pieces and/or their WiFi turned on on their phones while in the auditorium.  And I have to also deal with wireless mics being used.  The whole sound system uses wireless mics.  So it is definitely a concern.  I know I can get XBees in different frequencies, like the 900MHz range.  But, I'm mainly concerned about distance.  Can I have the computer sitting at the top of the auditorium sending signals to the stage, or should that person be sitting close to the stage. 
937  Topics / Product Design / Re: Eagle, logically connecting Pinheaders? on: February 16, 2012, 05:01:54 pm
Most, if not all production houses will not allow you to tile different designs on the same board.  You can tile the same design a few times, but not different ones.  Now, there are exceptions of course, and perhaps your board house will allow you to do that for a cost.  I don't know.

For Seeedstudio and ITeadstudio, both allow tiling of the same design, no more than 5 times (even if you can add more, they won't allow it.)
BatchPCB will allow you to tile it as many times as you want as they charge by the sq inch, not set sizes like the two above.  I suppose it's possible to have completely different designs on a single board if you're going through BatchPCB.  But then why bother, you can submit multiple designs and they fit things for you (again, as opposed to the previous two where you have specific board sizes to work with.)

As for logically checking pin headers, there is no way to do that that I'm aware of.  However, if you're duplicating your board design, then all of them will have the same exact wiring.  You shouldn't have to test the pins because EagleCAD won't magically change pin 2 for pin 6, pin 4 for pin 1 when you copy/paste a board layout

Maybe I'm just not understanding what you're trying to do.
938  Using Arduino / LEDs and Multiplexing / Re: Arduiono + MAX7221 trouble... leds not bright? on: February 16, 2012, 04:53:40 pm
Yeah, the 10K would be correct for that range ... approximately.  They should light up bright based on your description of each individual LED wired to a SEG pin (with all of them having a common ground DIG pin).

(messed up what I meant to say)
939  Using Arduino / LEDs and Multiplexing / Re: Arduiono + MAX7221 trouble... leds not bright? on: February 16, 2012, 04:07:37 pm
Tell me again how you're wiring 8 LEDs?  You're using two channels, so each one would pull 40mA.  Do you have all 8 driving from one DIG and one SEG pin?  Or are they wired as one DIG pin, and 8 SEG pins?
940  Using Arduino / Networking, Protocols, and Devices / Digi XBee versus Nordic RF on: February 16, 2012, 03:45:40 pm
Does anyone have experience with both of these hardware/protocols?  Let's put the cost aside, I'm looking specifically at performance.  I have a project proposal on the table for which I have one year to design a final product.  The short of it is being able to control LED lights on stage, wireless with a computer that's probably going to be used by someone sitting in the audience.  I'm thinking simply commands here, not streams of data.

My main concern is the venue, and the audience itself, specifically the possibility of interference and distance.  I would need things to be reliable, in other words, very little chance of losing data in transmission.  I know there will always be a chance, but the more I can eliminate that, the better.  I suppose I can forgo wireless and use an Ethernet connection to talk to everything on stage, but let's try this first.

So, anyone have a comparison made?  Range primarily, followed by reliability.

Personally I would love to stick to the Nordic modules because I already know how they work, with XBees I'm starting from scratch.  But, I will entertain the notion at least.
941  Using Arduino / LEDs and Multiplexing / Re: Arduiono + MAX7221 trouble... leds not bright? on: February 15, 2012, 02:10:44 pm
In situations like this, I tend to rip everything out, start completely fresh with a clear board and all.  Reconnect everything one by one.  It's possible you have a wire in the wrong hole in the breadboard and you're just not seeing it.  Happened to me.  So I usually rip everything out, start fresh, and I do the same with the code.  I open a new window and start completely new with the most basic of basics.  I won't even go into programming what I want it to do, I just write the most bare bones sketch, just to turn the segments on and off, one by one, and go through the full thing, meaning I start at DIG0 and test each segment.  Then switch to DIG1 and test each segment, etc., etc.

Once I figure out that it works, then I move forward.
942  Using Arduino / LEDs and Multiplexing / Re: Arduiono + MAX7221 trouble... leds not bright? on: February 15, 2012, 12:59:45 pm
I'm not in a location where I can actually sit down and study your pictures and what not.  Actually having to deal with a late bus on a school field trip right now.  However, just out of curiosity, flip one of those LEDs around on the breadboard.  Just humor me.  Turn it around 180 degrees and plug it back in.  If that's not the problem, then it's something else and like I said, at this point I can't do a whole lot.  Later this evening after my meeting perhaps.
943  Using Arduino / Motors, Mechanics, and Power / Re: Help identifying a computer PSU - non-standard HP molex? on: February 15, 2012, 12:08:58 am
That's what he did.  The PSU needs a load to continue running.  A lot of PSUs don't work without a load.
944  General Category / General Discussion / Re: Servo Symbol For Eagle on: February 15, 2012, 12:03:58 am
You can use Eagle for what you're wanting to do, however you have to create all the parts that you're going to use.  You won't find any schematic program that will include all the symbols you need.  Parts that don't belong on a PCB will not be in any schematic software, you will have to create them yourself.
945  Using Arduino / LEDs and Multiplexing / Re: Programming some fading LEDs! on: February 14, 2012, 07:38:31 pm
1) For some reason there seems to be a good deal of flickering on each LED as they fade up. I've only got one LED per pin so I'm not sure why this is happeneing. I really need this to be as smooth as possible (its for an art project). I did a project once using sine waves to allow LEDs to fade on pins that arent PWM and it was very smooth, maybe something like that would be better?

You don't say which code you're running.  When I run mine, I have zero flicker.  It's a smooth transition both ways.

2) All the LEDs fade out at the end but I really need them to stay on.

That's not what you said in your original post:

When the last LED reaches full brightness and stay there for 5 seconds I would like all LEDs to fade off.
Pages: 1 ... 61 62 [63] 64 65 ... 105