Should there be further models of the Raspberry Pi?

I think there are 1-wire linux drivers so you can directly attach the various 1-wire sensors. I looked loosely at that when thinking about the monitoring system for the thermal store but ended up buying an Embeded Data Systems OW-Server, that does all the hard and software grunt work and presents the information in XML over ethernet.

+1

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Cheers 
Dave.

I'm not. If it works then I want to use it, not throw it out.

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(\__/)  M. 
(='.'=) If a man stands in a forest and no woman is around 
(")_(") is he still wrong?

Ok. Even the 15" LCD monitors that we discarded a year ago and that the local school did not want, did have DVI. Maybe you still use CRT's?

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Ineptocracy 

(in-ep-toc?-ra-cy) ? a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers.

Keep in mind though that an HDMI-to-VGA adapter can be purchased for not a lot of money, and can be reused from one Raspberry Pi to another and indeed from one monitor to another. Just picking one that specifically lists Raspberry Pi compatibility:

Cost: all of UKP 6.27. And you can find less-expensive ones.

The cost to peopel who need that particular level of backwards-ompatibility is not very high; much much less of course than the price for a new monitor. But at the same time, that backwards-compatibility cost is then *not* pushed onto all those who don't want or need it.

// Christian Brunschen

Fair enough, I have loads of old stuff that still works, which might get used for something one day, like my collection of "classic" ISA sound cards, but I don't think it would be a good idea to stick an ISA bus on R-Pi.

I only replace stuff when I need to, or if I can get something better for free. As it happens, I have two monitors that support DVI-D and both of them were given to me for free. An HDMI-DVI-D lead cost me £1 on ebay and works perfectly.

Be careful. You should get an adaptor that uses an external PSU. That one will try to draw too much current from the Pi HDMI 5V line.

the

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The only screen here wit digital in (HDMI) is the telly. The three other screens attached to computers are VGA. None are CRT.

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Cheers 
Dave.

Why not add a vncserver and access the R Pi from a PC, iPad, .... via X-client?

I've prepared a custom version of the standard "image" which loads vnc servers, ssh servers, a web server, and a FTP server for use in schools. You are welcome to a copy. Drop me an Email and I will send you a download link.

The R Pi is great device but the HDMI video is less than ideal for schools, which tend to have rooms full off PCs with VGA monitors. The above project partly came about when a colleague mentioned the time waste in "cable swapping" and plugging in adaptors etc. between lessons. After a chat, it was clear a few other features would be useful and I produced the image as a favour.

Maybe a different market segment than I am normally buying...

Of course, DVI is inherently better than VGA for a flatpanel display because of the straight 1:1 mapping between video ram pixels and display pixels that is always difficult to achieve with VGA.

Indeed it is very sad that many schools seem to be used as bin by companies that want to get rid of old IT stuff and make it a "present" for schools it seems.

I have a simple HDMI to DVI cable (no expensive adapter) and that fits in any even older LCD screen since you would have to really search to find one that does not have neither HDMI nor DVI-D.

Herbert

Herbert zur Nedden German Archimedes Group

You mean like the $45 Beagle Bone Black (BBB) that has *much* more I/O capabilities?

The Pi seems to have reached a critical mass promoted by the publicity from its low price which has resulted in the huge volumes needed to reach a low selling price. It's actually pretty amazing if you think about it.

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Rick

I am sure many will never actually be used to do anything useful at all.

--
Ineptocracy 

(in-ep-toc?-ra-cy) ? a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers.

On Wed, 17 Jul 2013 08:52:48 +0100 (BST), "Dave Liquorice" declaimed the following:

I recall paying $20 in the late 70s for the Intel "kit" that consisted of the printed manual, an 8080A, 1K (maybe 2K) or EPROM (?EEPROM), a similar amount of /static/ RAM (21L02, as I recall), and enough 8-bit buffer chips to handle the multiplexed address and data buses. Note that there is no board, no display device, and no input device. {And the first chip I bought to go with it was the 8228 which replaced all five buffer chips!}

We (college digital electronics 3) never did get systems up and running, though I'd prototyped (if you can say such about hand assembled assembly language) a monitor program to work with a 2-digit 7-segment LED driver, and a 4x4 keyboard driver chip...

Maybe after I graduated the equivalent class could do it -- a semester system would give the time; I was in the days of the trimester.

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	Wulfraed                 Dennis Lee Bieber         AF6VN 
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

On Wed, 17 Jul 2013 18:44:59 +0100 (BST), "Dave Liquorice" declaimed the following:

Hmmm... My old monitor (now in storage, dated at least 8 years old -- a

20" Dell UltraSharp) had four inputs... Composite RCA being the lowest one, and DVI was the highest... VGA, I'm sure was in the middle, but I forget what the other one used. And the CRT that preceded that had DVI and VGA.

My current monitor (a 24" Dell equivalent to the UltraSharp; not cheap to get a monitor with color calibration data for photo editing) has DVI-D, HDMI, DisplayPort, Mini DisplayPort.

Now... At work the cheap monitor that bought to go with the laptop has VGA and DVI... But the laptop had VGA and HDMI... I bought an HDMIDVI converter.

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	Wulfraed                 Dennis Lee Bieber         AF6VN 
    wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

That is always true of any low cost device. I have any number of "free" or nearly free eval boards laying around I've never found the time to use for a project.

The only thing that has put me off the rPi is my lack of experience with Linux. Otherwise I'd likely have a few of them scattered around doing little tasks. Do they still sell the non-Ethernet version for $25 or was the lowest model always $35?

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Rick

The Zilog "kit" would have simply been a Z80 with a couple of 2114 sram chips and a 2K eprom![1] ;-)

I'd imagine you'd have had the same issue with a Zilog "kit".

[1] The Zilog alternative to Intel's 8080 reduced manufacturing costs significantly. It wasn't only the reduced component count, it was also the elimination of a +12v rail, simplifying the power supply to a single +5v rail.

Sinclair couldn't have offered a ready built toy computer based on the Intel kit for as little as the ZX80's selling price of £100- (£80- as a kit if, like me, you were happy enough to solder the bits together and pay yourself the 20 quid difference).

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Regards, J B Good

HDMI and DVI is the same, when you don't consider sound. "an HDMIDVI converter" is just a cable with the appropriate connector at each end.

For HDMI>VGA the story is quite different. Of course special chips exist for the conversion, and today's electronics production in low-wage no-environmental-regulation countries makes it possible to market such converters for the price of a pack of cigarettes, but this is not a simple cable.