Search found 637 matches

by paul
Fri Jul 25, 2008 2:20 pm
Forum: 8x8 LED board
Topic: power to 8x8 LED boards
Replies: 4
Views: 10114

Re: power to 8x8 LED boards

This 6 A model will run everything with room to spare. Very economical too!

http://www.powerstream.com/ac-0560.htm

Check to make sure they have a UL rating, but I'd be really surprised if they didn't.

Paul
by paul
Fri Jul 25, 2008 2:16 pm
Forum: RBBB
Topic: Voltage Regulator?
Replies: 1
Views: 4417

Re: Voltage Regulator?

From the parts list in the instruction manual. RBBBv1.5.revB.pdf 1 L4931CZ50LDO 5V, voltage regulator, optional - I also have in stock a one amp model the 2940 that isn't up on the site yet. Most of my current effort is going into getting a new website up and running. There's a screen capture of the...
by paul
Tue Jul 22, 2008 7:27 pm
Forum: 8x8 LED board
Topic: power to 8x8 LED boards
Replies: 4
Views: 10114

Re: power to 8x8 LED boards

npb, If you really want to be able to light up all the LED's at once, and also want to run them at 20 mA, then you do really need a 5A, 30 watt supply. With high brightness LED's this will be bindingly bright and be visible from many hundreds of feet away. If you find you don't really need all the i...
by paul
Sun Jul 20, 2008 10:58 pm
Forum: Exhibition
Topic: FM Stereo Broadcaster...
Replies: 7
Views: 25530

Re: FM Stereo Broadcaster...

Gilles, I wouldn't worry about frying things with the modulation input, although I haven't looked at schematics of the sparkfun module. I'd worry more about reverse polarity or wrong voltage on the supply of the module. Soldering a diode in reverse polarity across the voltage terminals is a good way...
by paul
Sat Jul 19, 2008 10:39 pm
Forum: Development
Topic: RBBB with ATMega328p ?
Replies: 4
Views: 9522

Re: RBBB with ATMega328p ?

Yes it's the 328P. The datasheet shows a DIP package but no signs of it at Digikey. I don't think this ships until fall. It should just drop into BBB and RBBB as far as I can see, and the price is only .30 more than the 168 chips so it should be an easy upgrade once David Mellis and the hard core pr...
by paul
Fri Jul 18, 2008 4:23 pm
Forum: Development
Topic: RBBB with ATMega328p ?
Replies: 4
Views: 9522

Re: RBBB with ATMega328p ?

I'll look into these chips. I think Lady Ada was talking about the 323 and expected the Arduino IDE to support it. Not shipping till fall though I think.

Paul
by paul
Sun Jul 13, 2008 11:34 pm
Forum: Hardware
Topic: P3 vs P4
Replies: 9
Views: 11454

Re: P3 vs P4

When you say that the capacitor is built-in... does that mean that there is a place to solder the capacitor? There are pads on the board and the kit contains the component. (i don't have the money to get assembled ones, and i'm buying 5 becouse i'll sell some to get a little money back..) Clever wa...
by paul
Sun Jul 13, 2008 2:15 pm
Forum: Hardware
Topic: P3 vs P4
Replies: 9
Views: 11454

Re: P3 vs P4

Cristián, The currently shipping model of the RBBB no longer needs the capacitor hack, as the capacitor is built-in. The P3 is also now mostly obsolete since the RBBB needs the reset line for automatic software reset and download. We supply the Diecimila bootloader now with both the BBB and RBBB boa...
by paul
Sat Jul 12, 2008 1:12 am
Forum: BBB
Topic: Problems with serial communication
Replies: 9
Views: 12655

Re: Problems with serial communication

grinan, This forum topic seems to be going in several directions. Starting new topics for different questions is a good idea in the future. It's hard to say what's going on with your pwm - The Arduino will definitely support 6 channels of PWM. There is a noted bug in pin 5 and 6 pwm which conflicts ...
by paul
Sat Jul 12, 2008 12:57 am
Forum: BBB
Topic: Problems with serial communication
Replies: 9
Views: 12655

Re: Problems with serial communication

dufarb, Give me some details about your platform and OS. If you're using Windows check this Device Manager -> Com Ports -> USB Serial Port -> Port Settings -> Advanced button -> Set RTS On Close The Arduino IDE setting should be Diecimila, as all my current products are provided with Diecimila bootl...
by paul
Thu Jul 03, 2008 9:58 pm
Forum: Hardware
Topic: Atmega168 Serial Speed
Replies: 8
Views: 14320

Re: Atmega168 Serial Speed

Matt, Sorry for the very tardy reply - I'm still getting used to my own forum software. I didn't parse out all your math - not quite getting the data format and color, but if your calculations are correct I actually think that it will work - also if you've got your bases covered on other aspects of ...
by paul
Wed Jul 02, 2008 6:19 am
Forum: BBB
Topic: Schematic or CAD files for rev. D of the BBB?
Replies: 7
Views: 19780

Re: Schematic or CAD files for rev. D of the BBB?

Oops - I guess it really is time to update those docs fully. Rev D just adds a 104 cap in series from the rts line (pin 6 on the cable) to the reset pin on the chip. The reset pin is also brought out on the left of digital headers on the front of the board. There's not much room for confusipn but I'...
by paul
Thu Jun 26, 2008 5:38 am
Forum: Development
Topic: wiring BBB
Replies: 6
Views: 11374

Re: wiring BBB

OK, the customers have spoken. Time to get busy on this one.
Spark Fun also sells the Wiring Board.

Paul
by paul
Thu Jun 26, 2008 5:36 am
Forum: 8x8 LED board
Topic: Data-flow along the panels
Replies: 2
Views: 7486

Re: Data-flow along the panels

Finchnixer, You've got it exactly right - the data flows fifo fashion through all the chips. It's really just one big serial chain. The data for the last panel is sent first, and the panel that the microcontroller is connected to is last. The only complexity is that with multiple panels you need to ...
by paul
Sun Jun 22, 2008 12:09 am
Forum: BBB
Topic: Problems with serial communication
Replies: 9
Views: 12655

Re: Problems with serial communication

Thanks for the post grinan, Is this for a Parallax Ping? There are five or six of thess sonar sensors out there, they all work in a similar fashion but the interface (& coding) details are slightly different. They are optimized in different ways too. The Ping sensor, for example, sees walls well, bu...
by paul
Fri Jun 20, 2008 9:03 pm
Forum: Development
Topic: wiring BBB
Replies: 6
Views: 11374

Re: wiring BBB

Michele,


Not quite sure what you mean. They RBBB's ship with Arduino Diecimila bootloaders.

Is this a reference to the Wiring Board (Atmega128)?

Paul
by paul
Tue Jun 17, 2008 11:06 pm
Forum: BBB
Topic: BBB board and ftdi cable under lInux
Replies: 7
Views: 14153

Re: BBB board and ftdi cable under lInux

Ask and you shall receive. Here's the patch for Linux to make autoreset work with the FTDI cable, courtesy of one of my customers.
I've renamed it LinuxFixArduino.zip and it can be found here http://moderndevice.com/connect.shtml

Enjoy

PB
by paul
Thu Jun 05, 2008 7:35 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 37595

Re: Auto reset problem

OK, the plot thickens in regards to the auto-reset problem. This concerns Linux users, but I'll bet something similar must be going on in certain versions of windows, and the "set RTS on close" is just a correction for the way Arduino IDE handles the serial port (vis a vis DTR / RTS lines). As I sai...
by paul
Thu Jun 05, 2008 7:22 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 37595

Re: Auto reset problem

Users should also check this link in my forum, which is also pointing to the auto-reset issues with the DTR line, and potential fixes. Hopefully David Mellis will be forthcoming in tracking this down, and getting the fix into core. If not I'll just have to post patched copy of the Arduino IDE on my ...
by paul
Thu Jun 05, 2008 7:15 pm
Forum: BBB
Topic: BBB board and ftdi cable under lInux
Replies: 7
Views: 14153

Re: BBB board and ftdi cable under lInux

Thanks for tracking this down Steve - the problem seems to be in how Arduino IDE handles the serial port. Users can check the link above, which also points here: http://www.ladyada.net/forums/viewtopic.php?t=4703 I'm not enough of a hard-core coder to have followed all of the fix, but if Mellis does...