SMT reflow oven (again)... Temperature measurement.

OK, I like the idea. I've found a suitable donor toaster oven (Hinari Tiny Top, 19ukp), all I need now is to develop the control stuff.

Elektor have published an article this month using the Maxim MAX6675 along with a type-K thermocouple for temperature measurement. This seems to be a very convenient device... direct thermocouple to microcontroller (SPI) interface - except, the part isn't currently available here in the UK (Maxim's UK disti quoting 19 weeks delivery)

I know there are other existing (analogue) cold-junction compensated thermocouple interfaces out there, but I like the direct-to-digital approach of the MAX6675.

Are there any other devices out there that would suit?

TCM

"The Cheese Machine" a écrit dans le message de news: snipped-for-privacy@Hotmail.co.uk...

Another article on the same subject, but published one year earlier :

I've seen it thanks, plus the Sparkfun site. I'll probably go the same way, using an AD595 and an analogue input on a PIC.

I used that part for my reflow oven. It works really well. I have been using it to solder BGA parts. Files are on the net at

I couldn't get one here is the US, so I requested samples. Two came in the mail a week later. Maxim has some really nice parts, but can make them quite difficult to buy. Digikey here carries them, but never has anything more complicated than a MAX232 in stock. Maxim does have an online store on their website. I haven't tried that yet, but am hoping it works since the MAX5893 DAC may end up in my next project.

If you can't get one, I may be able to mail you the other sample I got.

Darrell Harmon