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by TonyD
Mon Oct 03, 2011 12:43 pm
Forum: Other projects
Topic: Cases for the Raspberry Pi
Replies: 866
Views: 389412

Re: Cases for the Raspberry Pi

Is that a Sinclair QL?

Its keys don't look right (too raised and red keys!) so I'm guessing its a add-on keyboard for the QL.

Now this gives me an idea to dig out my old Speccy add-on keyboards :)
by TonyD
Fri Sep 30, 2011 1:33 pm
Forum: General discussion
Topic: Max data rate over I2C/SPI/UART
Replies: 21
Views: 14336

Re: Max data rate over I2C/SPI/UART

I2C as a bus is 400Kbit/s while SPI is typically 10 - 20Mbits/s or faster
by TonyD
Fri Sep 30, 2011 1:28 pm
Forum: General discussion
Topic: Total Cost of Ownership
Replies: 28
Views: 5051

Re: Total Cost of Ownership

Cheapo shops such as Poundland and Pound Stretcher, as well as Car boot sales and Computer shows are always a good source of cheap keyboards and mice.

I picked up half a dozen PS/2 keyboards at Woolies just before they closed for a £2 each
by TonyD
Thu Sep 29, 2011 2:08 pm
Forum: General discussion
Topic: RS232
Replies: 10
Views: 5184

Re: RS232

<r>It you just want a single RS232 then adding a board with a MAX232 or MAX202 line-driver is the way to do it. A UART function is available on the RPi 16-pin I/O connector(s).<br/> <br/> If you want multiple serial ports then you can use the SPI or I2C interface to add a dual or quad SPI/I2C UART c...
by TonyD
Fri Sep 23, 2011 10:44 am
Forum: Off topic discussion
Topic: HDMI to VGA connector
Replies: 29
Views: 8075

Re: HDMI to VGA connector

@obarthelem-y, thanks for the comprehensive posting, its all makes sense to me now :)
by TonyD
Fri Sep 23, 2011 10:40 am
Forum: Other projects
Topic: Raspberry PI with an arduino...
Replies: 26
Views: 15974

Re: Raspberry PI with an arduino...

<t>Connecting the RPi to Arduino using either a USB or Ethernet interface might be an overkill. I would consider using either a serial/UART, SPI or I2C interface. Both devices have them and they are easier to use than USB or Ethernet.<br/> <br/> Once connected, you could use the Arduino as a cheap d...
by TonyD
Fri Sep 23, 2011 10:34 am
Forum: Gaming
Topic: Self-Contained MAME Machine
Replies: 80
Views: 37504

Re: Self-Contained MAME Machine

wow, another great project. The cool RPi projects are coming thick and fast :)

A custom JAMMA board for the RPi might be the way to do it. Build a JAMMA like board for the RPi to sit on and use the JAMMA connector to mate with the cabinets controls.
by TonyD
Fri Sep 23, 2011 10:28 am
Forum: Other projects
Topic: Media/Emulator player
Replies: 1
Views: 1712

Re: Media/Emulator player

this sounds like a cool project. I'm pretty sure the SoC used in the RPi is already used in a media player so the RPi should be capable of doing what you want.
by TonyD
Fri Sep 23, 2011 10:22 am
Forum: General discussion
Topic: Physical design
Replies: 120
Views: 14618

Re: Physical design

Quote from Jongoleur on September 22, 2011, 18:42
Hey ukscone - how would you pronounce "Cholmondeley"? ( http://www.cpop.co.uk/ )

Hehehehehehehehe...... :-)
Very slowly and carefully :)
by TonyD
Fri Sep 23, 2011 10:20 am
Forum: General discussion
Topic: A small screen for the raspberry pi
Replies: 25
Views: 6324

Re: A small screen for the raspberry pi

<r>Quote from akjssdk on September 22, 2011, 19:14<br/> I have found a very cheap and small screen + touchscreen here: <URL url="http://www.ebay.com/itm/4-5-in.....1203wt_716">http://www.ebay.com/itm/4-5-in.....1203wt_716</URL><br/> <br/> Any chance this could work with Raspberry Pi? I don't have an...
by TonyD
Thu Sep 22, 2011 2:29 pm
Forum: General discussion
Topic: A small screen for the raspberry pi
Replies: 25
Views: 6324

Re: A small screen for the raspberry pi

Quote from Thunder__X on September 20, 2011, 20:41
Like this?
http://www.ebay.com/itm/3-5-TF.....1e62efad5e
I've got one very similar and it only supports composite video.
by TonyD
Thu Sep 22, 2011 2:03 pm
Forum: General discussion
Topic: Long term availability ?
Replies: 5
Views: 1359

Re: Long term availability ?

<r>Quote from crundy on September 22, 2011, 13:31<br/> Presumably when the SoC is EOL'd something else will be out which will be just as cheap and possibly more powerful, leading the way for a model C?<br/> Usually the case. Micros come and go all the time, but you can guarantee that when the SoC is...
by TonyD
Tue Sep 20, 2011 3:35 pm
Forum: Off topic discussion
Topic: Programming Hardware (microcontrollers)
Replies: 19
Views: 5342

Re: Programming Hardware (microcontrollers)

<t>Quote from csm on September 18, 2011, 23:23<br/> You might want to even check out the parallax propeller. It has 8 cogs you can think of a cog kind of like cores to allow parallel Processing. They also have a $25 starter board called the quickstart. <br/> Yes, Parallax have some nice boards as we...
by TonyD
Thu Sep 15, 2011 3:51 pm
Forum: Off topic discussion
Topic: Programming Hardware (microcontrollers)
Replies: 19
Views: 5342

Re: Programming Hardware (microcontrollers)

<t>Integrating a uc such as the AVR found in the Arduino or a Microchip PIC or TI MSP430 with a R-Pi should be easy to do. You could use one of the RS232 or SPI or I2C interfaces to communicate with the uc board. The Arduino is popular and making a Ardunio shield to a take a R-Pi should be easy enou...
by TonyD
Thu Sep 15, 2011 3:39 pm
Forum: Other projects
Topic: Integrating A CheapStat With Raspberry Pi
Replies: 1
Views: 1568

Re: Integrating A CheapStat With Raspberry Pi

Yeap, The R-Pi would make a very good user front end for the CheapStat.

In fact the R-Pi could be used as a front end for many other pieces of monitoring and test equipment. It reminds me of the days when labs used BBC Micros to monitor and/or control their experiments.
by TonyD
Tue Sep 13, 2011 3:12 pm
Forum: General discussion
Topic: Physical design
Replies: 120
Views: 14618

Re: Physical design

<r>Quote from emercer on September 10, 2011, 18:05<br/> +1 on the "Model C" / "Model B Developer version", I can definitely see how much flexibility replacing all the connectors with .1" spaced holes (or header strips) could add to special usage (non-Personal-Computing) cases.<br/> <br/> +1 to devel...
by TonyD
Tue Sep 13, 2011 1:01 pm
Forum: Staffroom, classroom and projects
Topic: Raspberry Pi - The Comic Book
Replies: 6
Views: 1576

Re: Raspberry Pi - The Comic Book

Jody's comic been doing the rounds on the Arduino forums. It's a great read.
by TonyD
Tue Sep 13, 2011 12:57 pm
Forum: Other projects
Topic: Break out board (GPIO, SPI, I2C, and UART)
Replies: 189
Views: 38321

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

<t>After reading the FAQ, it would seem user I/O is coming out to a pair of 1.27mm headers.<br/> <br/> "J11, J14: 1.27mm header providing ~16 GPIOs at 3v3, I2C and SPI interfaces and ARM JTAG"<br/> <br/> For an expansion board I would trace these out to 2.54mm headers to make it breadboard friendly ...
by TonyD
Tue Sep 13, 2011 12:20 pm
Forum: Other projects
Topic: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced
Replies: 225
Views: 236172

Re: Turn Raspberry Pi into a P.L.C (Programable Logic Controller) Advanced

<t>One of the good thing about Modbus protocol is its been around awhile, so there are lots of Modbus software stacks/implemenations available, many of them free.<br/> <br/> I did a small PLC design for the Adruino last year, so once I get my hands on a R-Pi (or just some I/O details) and I'll adapt...
by TonyD
Thu Sep 08, 2011 12:50 pm
Forum: General discussion
Topic: New video demo on the homepage
Replies: 8
Views: 1995

Re: New video demo on the homepage

great video Andy.
by TonyD
Thu Sep 08, 2011 12:09 pm
Forum: Other projects
Topic: PCB Etching Services
Replies: 42
Views: 7661

Re: PCB Etching Services

<r>here's a couple of companies from China I used. There prices very reasonable, with shipping times are what you would expect from China.<br/> <br/> <URL url="http://www.seeedstudio.com/">http://www.seeedstudio.com/</URL><br/> and<br/> <URL url="http://iteadstudio.com">http://iteadstudio.com</URL><...

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