Search found 637 matches

by paul
Wed Aug 27, 2008 11:46 pm
Forum: BBB
Topic: Only 3.6 Vdc on 5Vdc out
Replies: 1
Views: 5227

Re: Only 3.6 Vdc on 5Vdc out

tobias84, Glad you got it figured out. The board was designed with the USB cable running through the regulator to protect the USB line. The 300 mA regulator only shaves off a few mV so it's not a big deal. If you use a larger regulator I'd recommend the LM2940 which I'm going to sell on my website s...
by paul
Tue Aug 26, 2008 10:38 pm
Forum: Hardware
Topic: P3 vs P4
Replies: 9
Views: 11449

Re: P3 vs P4

btw, how do i track track the stuff? you said that "Priority Mail International shipping" is trackable, right? :) They advertise it that way but I haven't had much success doing it. I'll call USPS tomorrow and see what the deal is on this - they advertise as trackable and then don't seem to do anyt...
by paul
Tue Aug 26, 2008 10:34 pm
Forum: Hardware
Topic: P3 vs P4
Replies: 9
Views: 11449

Re: P3 vs P4

The P3 doesn't have the reset line on it. I've given up on it and will take the item down when my new site goes up soon.

My docs are somewhat out of date. I just ship the P4 when people order P3's so the P3 is going away. Don't tell anyone but you could even save a buck ordering the P3 :)
by paul
Tue Aug 26, 2008 10:31 pm
Forum: Development
Topic: arduino.cc... is it dead?
Replies: 2
Views: 7933

Re: arduino.cc... is it dead?

They've outgrown their ISP. LadaAda has been talking about mirroring their site because of reliability issues.

"They're working on the problem". Probably going to be about 3 wks to a month before they get new ISP and transfer things.
Most of the reference should be local with the IDE.

Paul
by paul
Sat Aug 23, 2008 11:33 pm
Forum: 8x8 LED board
Topic: Power Tips
Replies: 3
Views: 8253

Re: Power Tips

Yes that's the tradeoff with the non-multiplexed displays. You get awesome optical power out, but you need an awesome power supply. Here's the math - with 1k Rext resistors the LED's are supposed to draw 20 ma each so, when you light them all up you've got 64 x 20 mA = 1.2 A per panel. Look around f...
by paul
Sun Aug 17, 2008 6:42 am
Forum: Connecting to BBB, RBBB
Topic: Auto reset problem on BBB
Replies: 3
Views: 6323

Re: Auto reset problem on BBB

Cheater,

If you're using Linux see the Linux see the thread in the BBB topic. Patch link below.

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
by paul
Sat Aug 16, 2008 3:24 pm
Forum: 8x8 LED board
Topic: Construction tip
Replies: 1
Views: 5953

Re: Construction tip

Yes, that's in the docs, but you need to mount the LED's first - then test them to make sure that they work and are solid before covering them with the chips. In a pinch if you get stuck, you can mount replacement LED's "surface mount" style on the pads. No one is going to see this from a distance o...
by paul
Tue Aug 12, 2008 9:36 pm
Forum: BBB
Topic: BBB Troubleshooting: voltage / stk500_recv(): not responding
Replies: 5
Views: 15061

Re: BBB Troubleshooting: voltage / stk500_recv(): not responding

brod, You're not going to see more than about 4.8V. This is shaved off by the low-dropout regulator. Other implementations of Diecimila-like boards, generally don't run the USB through the regulator, and use a polyfuse instead. I chose to use a LDO regulator and run the USB voltage through the regul...
by paul
Sun Aug 10, 2008 9:16 am
Forum: Development
Topic: Arduino proto board
Replies: 19
Views: 32944

Re: Arduino proto board

Thanks for the drawing - it's about what I had in mind.

Paul
by paul
Sun Aug 10, 2008 9:14 am
Forum: BBB
Topic: BBB Troubleshooting: voltage / stk500_recv(): not responding
Replies: 5
Views: 15061

Re: BBB Troubleshooting: voltage / stk500_recv(): not responding

Glad you got it going - I'm concerned about pins 7 & 8 though - you should see close to 5V there. The low-dropout regulator will shave 100 mv or so off the 5V USB voltage, so maybe 4.9 V or so on USB and real close to 5 on external. Try reheating those socket pins and any others that look suspicious...
by paul
Thu Aug 07, 2008 10:07 pm
Forum: Development
Topic: Arduino proto board
Replies: 19
Views: 32944

Re: Arduino proto board

Yes, I've thought a lot about this - Instead of the shield idea - just give people the Freeduino functionality on a proto board. Send me a rough sketch of scale and size if you want. I should have hopped on this idea a while ago but there's no time like the present. Or I wish I could make some time ...
by paul
Thu Aug 07, 2008 12:17 pm
Forum: RBBB
Topic: Troubleshooting assistance...
Replies: 2
Views: 4740

Re: Troubleshooting assistance...

Sorry the manuals out of date. I've got most of the changes made and just need to carve out some time to finish it. Maybe this will light a fire under me.

That behavior is all correct for Diecimila bootloader, which we've been shipping with RBBB for six mo's or so.

Paul
by paul
Wed Aug 06, 2008 8:16 pm
Forum: Connecting to BBB, RBBB
Topic: Pin out on the BBB board
Replies: 1
Views: 4396

Re: Pin out on the BBB board

The P4 mates seamlessly with the first five pins on the left end of the digital header RST GND 5V RX TX. It can be rewired to work with the cable headers, if you want to use it that way. Simply cut the traces on the top of the P4 board in between the first and second rows of holes. This is easiest t...
by paul
Mon Aug 04, 2008 10:40 pm
Forum: RBBB
Topic: power issues with a servo and voltage regulator issues
Replies: 2
Views: 4841

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: 37584

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: 6323

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: 16951

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: 4784

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: 6999

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: 6294

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...