while at school i was quite good at soldering so i want i would be happy to put a prottype circiut together for you? if you could send me a circuit/pcb design? I cant help you with the software writng tho, sorry.

...

Not aware of any school friendly robotics or data logging stuff for Linux.

I've been playing around with a design for a low cost one channel datalogging system, which would be ideal for a simple C project.

Outline concept is this...

Sound card is used to generate an AC signal which is conditioned to 0.7 volts (using a diode and resistor) which is then split across a potential divider - one side of which is fixed resistor other side is thermistor / LDR.

Stereo mike input is then used to compare the voltage across the whole PD with the voltage across the thermistor / LDR.

Data logging process is simple - write to a file of fixed maximum size with initial sampling rate. If the file fills the sample rate recursively halves. This program could be as simple or as complex as you want.

Total component cost less than £2 for a basic hard wired system. Maybe take it up to £5 with boxes and variable resistors for a device that will use different sensors.

Anyone fancy doing it with me? I can draw the circuit idea out in a few mins. Some expert can write the code and I'm not good with a solering iron, but could do it...

===== rgds, Richard Rothwell -------------------------------------------------------------------- GNU and Wine are rirds. Rird is recursively defined.

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Sam Deakin and Andrew Nix St Paul's Catholic High School Firbank Road Newall Green Wythenshawe Manchester M23 2YS tel: 0161 4375841, ext. 168 fax: 0161 4982030 tech4766@mecgrid.org.uk

--- s-clarob@st-aidans.cumbria.sch.uk wrote:

Surely for the price of an 8bit A-D and a few other simple components it would be much easier to use the parallel port to sample the data.

Rob

The concept is that a class can produce the sensors in their DT lessons and then do the sensing with kit they have manufactured themselves. Some pupils could look at the code of the logger, etc. I am also looking at a more accurate system using the games controller and a chip - rather like this... http://www.cesko.host.sk/GamePortTemp_eng.htm ===== rgds, Richard Rothwell -------------------------------------------------------------------- GNU and Wine are rirds. Rird is recursively defined. __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer

--- Phil Driscoll wrote: > Brilliant idea Richard!

Why not set up a sourceforge (or similar) project to do it. I'm well connected with D&T advisers in the UK so I will drum up some publicity if you get things going.

I'd be more than happy to contribute to this project... :) -- Thomas Adam ===== Thomas Adam "The Linux Weekend Mechanic" -- www.linuxgazette.com __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer

The project has been given a (temporary?) home on the schoolforge.org.uk wiki - visit it at: http://www.schoolforge.org.uk/wiki/wiki.pl?DataLogging let's move the discussion there where it can be developed. Please edit this, add links and get involed. In particular I would like anyone who has written worksheets for any data logging lessons to post them, as that will let us come up with a requirements list. I will try and draw up my ideas an post them as soon as possible. ===== rgds, Richard Rothwell -------------------------------------------------------------------- GNU and Wine are rirds. Rird is recursively defined. __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer

On Thu, 2003-05-15 at 14:12, Thomas Adam wrote:

--- Richard Rothwell wrote: > The project has been given a (temporary?) home on the

...

schoolforge.org.uk wiki - visit it at:

http://www.schoolforge.org.uk/wiki/wiki.pl?DataLogging

let's move the discussion there where it can be developed. Please edit this, add links and get involed.

In particular I would like anyone who has written worksheets for any data logging lessons to post them, as that will let us come up with a requirements list.

I'll add my self to this list, although it should be pointed out that I am only 20 and at university, although I'm hoping that doesn't matter..

Why should it. Its outcomes that matter not how old you are. The youngest contributor to the Linux kernel is reputed to be 9!

Incidentally, does this application have to MS specific? I'm making the assumption that this is the case?

I hope not. We really need Linux support for data logging and control technology. Its a niche that would be relatively easy to get into and there is no great benefit in meg machines running XP. It also makes the Linux proposition better because we can cover a bigger range of the curriculum. Maybe design links to transfer data straight into OpenOffice.org Calc would help the application be cross platform. Maybe a web based front end for the user.

-- Thomas Adam

===== Thomas Adam

"The Linux Weekend Mechanic" -- www.linuxgazette.com

__________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer -- ian

Super! Keep us all updated. -Kyle. == Kyle Williamson Solent Educational Solent House, Roman Road, Dibden Purlieu, Southampton, Hampshire, SO45 4RQ Tel: (023) 80 843189 Fax: (023) 80 848715 "You know the world is going crazy when the best rapper is a white guy, the best golfer is a black guy, the Swiss hold the America's Cup, France is accusing the US of arrogance, and Germany doesn't want to go to war." -----Original Message----- From: Richard Rothwell [mailto:raroth42@yahoo.co.uk] Sent: 15 May 2003 11:57 To: Suse-linux-uk-schools@suse.com Subject: Re: [suse-linux-uk-schools] Datalogging --- s-clarob@st-aidans.cumbria.sch.uk wrote:

Surely for the price of an 8bit A-D and a few other simple components it would be much easier to use the parallel port to sample the data.

Rob

The concept is that a class can produce the sensors in their DT lessons and then do the sensing with kit they have manufactured themselves. Some pupils could look at the code of the logger, etc. I am also looking at a more accurate system using the games controller and a chip - rather like this... http://www.cesko.host.sk/GamePortTemp_eng.htm ===== rgds, Richard Rothwell -------------------------------------------------------------------- GNU and Wine are rirds. Rird is recursively defined. __________________________________________________ Yahoo! Plus For a better Internet experience http://www.yahoo.co.uk/btoffer -- To unsubscribe, e-mail: suse-linux-uk-schools-unsubscribe@suse.com For additional commands, e-mail: suse-linux-uk-schools-help@suse.com