Go to advanced search

by gbulmer
Wed Nov 30, 2011 1:18 am
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Quote from bradburts on November 29, 2011, 14:11<br/> Thanks. Think that the oven work is a no for me <E>;)</E>.<br/> I am in fact exceptionally lazy. I was looking for something cheap and off the shelf.<br/> The ATmega is nice n cheap but I will have to write some software and program it.<br/> <...
by gbulmer
Tue Nov 29, 2011 1:45 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Quote from bradburts on November 29, 2011, 08:58<br/> Good point.<br/> I used to design in USB to RS232 dongles rather an overpriced PC104 board.<br/> Is that 4 I/O or 2 I and 2 O, RTS, CTS etc?<br/> <br/> What chance would I have soldering one to something like<br/> <URL url="http://www.hobbytro...
by gbulmer
Tue Nov 29, 2011 1:18 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<t>Quote from PiMSE on November 28, 2011, 19:17<br/> At the risk of incurring the wrath of the Internet, I'm going to disclose this right up front: I have not read all 15 pages of posts on this forum. No apologies.<br/> <br/> And now, I'm going to try to introduce what I hope is a new idea (on p16 o...
by gbulmer
Wed Nov 23, 2011 11:38 am
Forum: Other projects
Topic: Portable lab for musicians
Replies: 12
Views: 3146

Re: Portable lab for musicians

<t>Quote from Neil on November 11, 2011, 10:57<br/> Quote from gbulmer on November 9, 2011, 02:56<br/> To put things into context, the Fairlight CMI was a digital sampling synth built in the late 70's and 80's, and used dual 6800 processors, then later 68000 processors. Maybe 1/50th the performance ...
by gbulmer
Mon Nov 21, 2011 9:45 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Quote from abishur on November 21, 2011, 15:17<br/> Quote from gbulmer on November 21, 2011, 13:54<br/> Quote from abishur on November 21, 2011, 13:36<br/> <br/> Interesting... so if we use the GPIO pins to supply 5V, then we need to make sure to include our own voltage protection (since it's com...
by gbulmer
Mon Nov 21, 2011 1:54 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<t>Quote from abishur on November 21, 2011, 13:36<br/> Quote from Gert van Loo on November 21, 2011, 09:13<br/> "input" the incoming PSU side of the fuse, "output" the 5V input passed through the fuse.<br/> According to that definition the GPIO 5V is on the 'output'.<br/> <br/> <br/> Interesting... ...
by gbulmer
Wed Nov 09, 2011 6:59 pm
Forum: Other projects
Topic: Portable lab for musicians
Replies: 12
Views: 3146

Re: Portable lab for musicians

<r>Quote from Pingvinio on November 9, 2011, 09:55<br/> Sooo... as I understand for sampling purposes and midi stuff the Rpi might be OK, but for actual Effect Processing it is NOT enought? Is this right? What if I take an OK sound interface witch ASIO support... will it get me any further?<br/> <br...
by gbulmer
Wed Nov 09, 2011 2:56 am
Forum: Other projects
Topic: Portable lab for musicians
Replies: 12
Views: 3146

Re: Portable lab for musicians

<r>To put things into context, the Fairlight CMI was a digital sampling synth built in the late 70's and 80's, and used dual 6800 processors, then later 68000 processors. Maybe 1/50th the performance of the R-Pi.<br/> <URL url="http://en.wikipedia.org/wiki/F.....rlight_CMI">http://en.wikipedia.org/w...
by gbulmer
Wed Nov 09, 2011 2:41 am
Forum: Other projects
Topic: Portable lab for musicians
Replies: 12
Views: 3146

Re: Portable lab for musicians

<r>What sort of midi keyboard or effects are you interested in?<br/> <br/> There is an open source midi synth, using an ARM processors running at 1/10th the speed of an R-Pi and without hardware floating point at:<br/> <URL url="http://sites.google.com/site/preenfm/">http://sites.google.com/site/pre...
by gbulmer
Wed Nov 09, 2011 1:56 am
Forum: Staffroom, classroom and projects
Topic: Inspirational people in Computer Science
Replies: 99
Views: 13610

Re: Inspirational people in Computer Science

<r>I don't think they are mentioned, so what about the IT Crowd?<br/> <URL url="http://www.channel4.com/progra.....e-it-crowd">http://www.channel4.com/progra.....e-it-crowd</URL><br/> Some of the kids I talk to (I am a STEM ambassador) have seen it, and think its quite funny. At least kids'd know ho...
by gbulmer
Wed Nov 09, 2011 1:34 am
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Quote from Bacan on November 8, 2011, 20:41<br/> Thank you for the book reference.<br/> <br/> Personally, I find Four Steps to the Epiphany by Steven Gary Blank<br/> a more robust exercise and resource in business planning and product development. FYI: for the past ten years I've been aiding earl...
by gbulmer
Tue Nov 08, 2011 5:05 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Bacan - a bit off topic, but let me try ...<br/> <br/> I very strongly recommend you read "Crossing the Chasm", and you can start here:<br/> <URL url="http://en.wikipedia.org/wiki/C.....asm_%28book%29">http://en.wikipedia.org/wiki/C.....asm_(book)</URL><br/> that will give one explanation about "...
by gbulmer
Tue Nov 08, 2011 4:47 pm
Forum: Off topic discussion
Topic: I am having difficulties accessing the forum
Replies: 3
Views: 799

Re: I am having difficulties accessing the forum

For the very first time, I have had errors accessing the forum today.

I get a page containing only the words:
Error establishing a database connection

I've had it about 10 times in under two hours.
Are you suffering an attack?
by gbulmer
Tue Nov 08, 2011 4:39 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Quote from liz on November 8, 2011, 16:13<br/> Just to muddy the waters even more, I should add that we (the Raspberry Pi Foundation) do plan to make some add-on boards ourselves next year. <br/> <br/> liz - I think that is an extremely helpful statement. My interpretation is, the R-Pi *STANDARD*...
by gbulmer
Tue Nov 08, 2011 4:03 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<t>Quote from hippy on November 8, 2011, 14:48<br/> I don't believe any efforts to create R-PI GPIO breakout or expansion boards should necessarily be constrained by needing to be Arduino Shield compatible.<br/> <br/> But I'd also say; if someone wants to create an R-Pi Shield interface which is ful...
by gbulmer
Tue Nov 08, 2011 3:47 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Quote from psergiu on November 8, 2011, 14:08<br/> I believe that a lot of people will want to use the RPi as an Arduino replacement for "blinking lights" and other low-level & low-speed projects.<br/> Yes, that is what I want to enable.<br/> IMHO, the easiest system to use is a plug straight...
by gbulmer
Mon Nov 07, 2011 11:00 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<t>Quote from psergiu on November 7, 2011, 20:28<br/> If anyone will create a add-on board with all the I/O pins exposed, please try to use the Arduino pinout so people can reuse Arduino Shields (3.3V-compatible that don't use the Analog Inputs pins). As the Arduino layout is open-sourced, there's a...
by gbulmer
Sun Oct 16, 2011 9:17 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Quote from bradburts on October 16, 2011, 21:24<br/> Thanks for the detailed answers.<br/> I will support the software development, if its needed.<br/> The reason I am pushing for thoughts on basic hardware protection is to avoid the situation you describe, no software for hardware, no hardware f...
by gbulmer
Sat Oct 15, 2011 9:44 pm
Forum: Staffroom, classroom and projects
Topic: Teaching Youngsters Programming
Replies: 131
Views: 27963

Re: Teaching Youngsters Programming

IMHO, it is worth digging into a second programming language, preferably one that is quite different from the first one. I think learning the second one gives a wider view of what programming is all about.
by gbulmer
Sat Oct 15, 2011 9:22 pm
Forum: Other projects
Topic: An OS for the R-Pi created completely in assembly
Replies: 54
Views: 14269

Re: An OS for the R-Pi created completely in assembly

<r>Quote from Soul_Est on October 10, 2011, 02:56<br/> This is my dream for the R-Pi. Considering how little computing power the ARM11 processor in the device has for working with operating systems and programs created using higher lever languages, I figured, "Why not create an OS for the R-Pi using...
by gbulmer
Sat Oct 15, 2011 6:46 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<t>Quote from WizardOfOZ on October 13, 2011, 13:58<br/> A few comments:<br/> <br/> *) Input protection diodes are not super effective in most cases. If the fault currents are high enough that you need external diodes above and beyond those on the chip, then you are most likely in trouble in any cas...
by gbulmer
Sat Oct 15, 2011 6:29 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<t>Quote from Ben_P on October 15, 2011, 18:15<br/> Quote from gbulmer on October 13, 2011, 00:38<br/> I'm a bit cautious, so I'd look at the datasheet for the SoC, and see how much current a pin could source or sink, and calculate the resistor from Ohms law R = V/I<br/> and that would be a lower bo...
by gbulmer
Wed Oct 12, 2011 11:38 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<r>Quote from bradburts on October 12, 2011, 22:43<br/> The Atmega solution (or whatever micro) will follow from the simple protection breadboard.<br/> What value resistor should we be using?<br/> Plus it would help to have a circuit & suggested inline parts posted so we can get started safely a...
by gbulmer
Wed Oct 12, 2011 4:27 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<t>Quote from bradburts on October 12, 2011, 10:48<br/> That would be the best approach. We won't get far salivating over all the different I/O options we would like to play with!<br/> We discussed series resistor & diodes to each rail. Is there a hardware engineer in the house who can confirm?<...
by gbulmer
Wed Oct 12, 2011 4:04 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 35799

Re: Break out board (GPIO, SPI, I2C, and UART)

<t>Quote from hippy on October 12, 2011, 10:20<br/> Quote from n1ywb on October 12, 2011, 04:01<br/> This is a thread about a carrier board, we're talking about putting a uart on a carrier board, I think.<br/> <br/> My understanding is the original intent was just a breakout board, getting the signa...

Go to advanced search