turkey

looks good that Mike, but from what I can tell the 304 does not log, you need the 309 for that although even the makers site is somewhat light on information unfortunately. I agree it looks a nice bit of kit tho and basically does everything I would want assuming it logs without the pc being present.

thanks for the guidance so far. I suppose I should re cover this oven bit, its a brick built dome which will have wood burnt in it to heat the bricks and then cook in it, it will take a while to heat and then hopefully with all the planned insulation a while to cool, measuring this is my plan. Pretty basic and definitely no nasty microwaves flying around so i would like to take and store (possibly display at a later stage) temp readings from upto 4 sensors, these would first be read over usb I suppose if easier, or stored somewhere for retrieval via usb or on SD card for reading in via the pc. SD would probably be perfect as its safe if power is lost and I assume i will want this to run on batteries eventually. I can then take the values and plot vs time to see the temp curve of the oven. Not mission critical but I think fairly interesting to know if you plan to bake bread in the oven also (I do). given this is a single project and my first and not really a productive one blahh blahh i would ideally like it to be as cheap as possible re the SPI, well any advice here is also well received, from my brief googling it seems that for thermocouples you need and amplifier chip as the voltages returned are so small and they need some reference temp to give accurate readings, thus you can by single chip solutions. I have seen analog and digital versions, checking Sparkfun (I have no idea if they are good or not but stocked both so seemed a good price comparison site) shows the digital version nearly half the price of the analog one, plus the digital Max6675 is rated to 1024 degrees which is as per my application high temp ratings are a bonus. Analog: http://www.sparkfun.com/products/306 Digital: http://www.sparkfun.com/products/307 Like I said I am a total newb with the electronics side so sorry for the totally non technical appraisal of these two options. I am in the UK if that makes any difference to supplier choice / availability etc..