Search found 645 matches

by paul
Wed Nov 19, 2008 4:38 pm
Forum: Connecting to BBB, RBBB
Topic: Cannot Download Sketch
Replies: 9
Views: 11374

Re: Cannot Download Sketch

Jim, Don't feel bad about this not all the problems are your fault. First the easy issue I forgot you're not using the cable so just try this. Device Manager -> Com Ports -> COM1 -> Port Settings -> Advanced button -> Set RTS On Close Now for the harder part. If you are using the most conventional, ...
by paul
Wed Nov 19, 2008 11:49 am
Forum: Connecting to BBB, RBBB
Topic: Cannot Download Sketch
Replies: 9
Views: 11374

Re: Cannot Download Sketch

Try this:
A: Change this serial port setting: Device Manager -> Com Ports -> USB Serial Port -> Port Settings -> Advanced button -> Set RTS On Close

Also note that the P4 adapter needs to be jumpered straight across for the pin mapping holes.

Write back if that doesn't get it,

Paul
by paul
Mon Nov 10, 2008 9:53 pm
Forum: Development
Topic: Diecimila Interposer
Replies: 4
Views: 9700

Re: Diecimila Interposer

I hear your pain. I'm working on hooking Lady Ada's Wave shield and having to consult the schematic and board diagram.

I'll post the BBB hookup when I'm done.

Paul
by paul
Mon Nov 10, 2008 9:51 pm
Forum: BBB
Topic: Differences in BBB and RBBB
Replies: 4
Views: 12167

Re: Differences in BBB and RBBB

The 1M resistor on older versions of the BBB is a load resistor for the resonator. It shows up in a lot of schematics but the reality is that most contemporary microcontrollers have this built into the internal crystal oscillator pins. I had to go to some work to track this down and finally got an a...
by paul
Mon Nov 10, 2008 9:31 pm
Forum: Hardware
Topic: Resonator vs Crystal
Replies: 2
Views: 5552

Re: Resonator vs Crystal

The accuracy difference between a regulator and a crystal are on the order of .1% for a resonator vs .01% for a crystal. So in timekeeping - a resonator will be accurate to 10 seconds a day and a crystal might be accurate to 1 or 2 seconds a day. What most people don't understand is that neither the...
by paul
Mon Nov 03, 2008 6:57 am
Forum: RBBB
Topic: i destroyed one of the ceramic capacitors
Replies: 3
Views: 6010

test post

test message
by paul
Sun Nov 02, 2008 3:10 pm
Forum: Development
Topic: Diecimila Interposer
Replies: 4
Views: 9700

Re: Diecimila Interposer

I've thought a lot about the form factor thing and I'm designing the tentatively named freeduino pro, that has a Diecimila form factor, no USB chip but the cable header. But also pins for plugging it into the breadboard and an analog block similar to BBB - That end of the Diecimila is sorely lacking...
by paul
Wed Oct 29, 2008 9:06 pm
Forum: RBBB
Topic: i destroyed one of the ceramic capacitors
Replies: 3
Views: 6010

Re: i destroyed one of the ceramic capacitors

Stick in the .01 and forget about it, you'll never know the difference. It's just a decoupling capacitor made to absorb high frequency noise on the power line. It's in series with a 47 ufd capacitor, and the total capacitance of parallel caps adds. So you might ask yourself 47.1 ufd, what's up with ...
by paul
Thu Oct 23, 2008 6:04 pm
Forum: Connecting to BBB, RBBB
Topic: can only upload sketch first time
Replies: 3
Views: 6490

Re: can only upload sketch first time

"A: Change this serial port setting: Device Manager -> Com Ports -> USB Serial Port -> Port Settings -> Advanced button -> Set RTS On Close" Paul- what about putting a note about this (and "black is ground, yellow is RX") on the "connect" product page? Good idea - I have been procrastinating on this...
by paul
Thu Oct 23, 2008 5:59 pm
Forum: RBBB
Topic: Auto reset problem
Replies: 21
Views: 38271

Re: Auto reset problem

It's supposed to be 100 nanofarad. (.1 ufd - 104) Don't my instructions show that. The idea with the series capacitor is to allow a low going pulse on the DTR line to reset the uC but still have the pullup resistor holding the reset line high so manual reset will work too. It also allows more flexib...
by paul
Thu Oct 23, 2008 5:52 pm
Forum: 8x8 LED board
Topic: Another Power Question from a Newbie
Replies: 7
Views: 12568

Re: Another Power Question from a Newbie

The 7805 is going to get hot if you have all the LED's on for any length of time. If you only light up a few of them at once it might work fine, a better bet might be to use 4 AA, C or D batteries or a 6V lantern battery. The switching regulator will work fine though and is efficient - it's just fin...
by paul
Thu Oct 23, 2008 5:39 pm
Forum: 8x8 LED board
Topic: Some simple demo code?
Replies: 6
Views: 11626

Re: Some simple demo code?

Oops, that code has a problem in the way frames are indexed. Here's the fix I think. I haven't tested either listing so there may be issues... Write back if they don't work. I'll try and stay closer to the forum. I can't seem to find an email reminder in the prefs. Probably something I'll have to in...
by paul
Thu Oct 23, 2008 11:53 am
Forum: 8x8 LED board
Topic: Some simple demo code?
Replies: 6
Views: 11626

Re: Some simple demo code?

Try this for now. I'm trying to find time to get something better together. You've got the basic idea though

Code: Select all

#include <avr/pgmspace.h>

Removed by Paul - use code below

}
by paul
Sun Oct 19, 2008 11:18 pm
Forum: 8x8 LED board
Topic: Some simple demo code?
Replies: 6
Views: 11626

Re: Some simple demo code?

I've thought about doing this and always found something more important. This will spur me on. I'll just set up an array and flip frames in an animation.
Write back if it's not on the site in a couple of days.

Paul
by paul
Sat Oct 18, 2008 3:25 pm
Forum: 8x8 LED board
Topic: LED's in your video
Replies: 4
Views: 9715

Re: LED's in your video

Sorry about the slow response, I've been busy. I need to find the setting that will send me mail when something new show up in the forum. Maybe this will spur me on. the world's full of LED's. I've been trying to just get them at Digikey recently. There are definitely high quality Asian ones out the...
by paul
Sat Oct 18, 2008 3:18 pm
Forum: RBBB
Topic: Some questions from a newbie
Replies: 2
Views: 4655

Re: Some questions from a newbie

Crystals will work fine - but as you say it's a space issue - just hang them over the side and "fagedaboutit" as we say here in RI. You also have to stub in some 22 pf caps too. I've got s.m. caps that fit in between the pins. In fact I've got a whole crystal kit that is ready to go in bags - I just...
by paul
Thu Oct 09, 2008 3:11 pm
Forum: Connecting to BBB, RBBB
Topic: Connection Questions
Replies: 10
Views: 17243

Re: New Forum & Connection FAQ

Actually if you're using the FT232 breakout board you can use the DTR line (that's the line Arduino uses - but it's not on the FTDI cables) and you'll avoid all the "Set RTS on close" hassles.

Paul
by paul
Mon Oct 06, 2008 9:17 pm
Forum: Development
Topic: RSS feed for the forums
Replies: 10
Views: 17757

Re: RSS feed for the forums

Thanks for the link - I'll try and upload it and see if it works. The new site is OS Commerce, which is really just php scripts. Don't know about RSS. I'll ask my web coach about it.

Paul
by paul
Sun Oct 05, 2008 3:44 pm
Forum: Development
Topic: RSS feed for the forums
Replies: 10
Views: 17757

Re: RSS feed for the forums

I know as a tech guy I'm supposed to be more on the ball. C'est la vie. I've got a new site that is languishing in website Pergatory, waiting to go online, with a blog on the front end where I can gossip about the rest of the Arduino universe. The shop is full of stuff waiting to get photographed an...
by paul
Sat Sep 27, 2008 9:15 pm
Forum: 8x8 LED board
Topic: Power Tips
Replies: 3
Views: 8448

Re: Power Tips

Try getting a surplus computer supply - you can find them supplying 20A at 5V for 10 or $15. Try the trash too, or a municipal computer recyling center. At least you know one part that will be recycled from the machines you recycle in reverse. A lot of computer recycling is completely dubious with e...