Search found 644 matches

by paul
Mon Aug 04, 2008 10:40 pm
Forum: RBBB
Topic: power issues with a servo and voltage regulator issues
Replies: 2
Views: 4961

Re: power issues with a servo and voltage regulator issues

The LCD "chip" is not really a voltage regulator - just an NPN Darlington transistor. You can't really tell what's in a package without looking up the numbers, but the size does give you an idea about a device's power handing capability. I bought some TO-220 LM2940's I bought but haven't gotten them...
by paul
Fri Aug 01, 2008 8:58 pm
Forum: Exhibition
Topic: Modicon Modbus RTU Slave protocol comes to the Arduino/Freed
Replies: 8
Views: 38298

Re: Modicon Modbus RTU Slave protocol comes to the Arduino/Freed

Thanks for this mdAndy, I'm unfamiliar with the modbus, but it seems like a Programmable Logic Controller protocol from what you say. Parallax seems like they were pretty successful with their BS based programmable logic controller - because lots of people thought PLC programming was arcane and unfr...
by paul
Fri Aug 01, 2008 8:50 pm
Forum: Connecting to BBB, RBBB
Topic: Auto reset problem on BBB
Replies: 3
Views: 6483

Re: Auto reset problem on BBB

Oh Boy! Just when I think this problem is mostly solved. I can, however, upload programs (oops- sketches) the traditional way - by pressing the reset switch first. This is odd because manual reset is not supposed to work under any circumstances with the Diecimila bootloader (maybe if extremely lucky...
by paul
Fri Aug 01, 2008 10:41 am
Forum: Connecting to BBB, RBBB
Topic: Connection Questions
Replies: 10
Views: 17210

Connection Questions

Connecting to BBB's and RBBB's FAQ. Q: My P4 board won't upload to my BBB. A: Here's the problem. Unlike USB cables and the BUB, the P4 has no source for 5 volts, as there is no power available from the COM port. Therefore there needs to be 5V present at the pin header of the BBB for the P4 to work...
by paul
Tue Jul 29, 2008 7:36 am
Forum: BBB
Topic: Extra Pin on BBB Rev D
Replies: 1
Views: 4901

Re: Extra Pin on BBB Rev D

It's just a utility hole for perhaps connecting other power supplies, such as a 9V battery clip. I don't really supply 4 pin headers for that anymore. In the new D2 rev of the board, I added an adjacent ground hole. I've got to redo the docs to show new boards and I'm going to put in a page on vario...
by paul
Fri Jul 25, 2008 2:31 pm
Forum: Development
Topic: RBBB with onboard USB
Replies: 2
Views: 7187

Re: RBBB with onboard USB

I'm trying to do a board swap with the Iduino people to cross represent our products. Either that or I'm going to engineer something similar.

The serial converter to replace the cable is on its way too.

Paul
by paul
Fri Jul 25, 2008 2:27 pm
Forum: BBB
Topic: BBB + P4 + Belkin USB to Serial
Replies: 3
Views: 6436

Re: BBB + P4 + Belkin USB to Serial

I'd bet if you get the drivers installed for the belkin USB converter, all will be fine. Reports welcome here though. There seem to be a number of low-cost USB solutions out there right now, and the issues tend to be drivers - mostly on Mac and Linux. If it will connect with RS232 then the P4 will w...
by paul
Fri Jul 25, 2008 2:20 pm
Forum: 8x8 LED board
Topic: power to 8x8 LED boards
Replies: 4
Views: 10265

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: 4513

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: 10265

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: 25800

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: 9724

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: 9724

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: 11675

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: 11675

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: 12923

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: 12923

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: 14604

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: 20012

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: 11629

Re: wiring BBB

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

Paul