Post by dougclay on Jun 6, 2012 21:29:04 GMT
SPI works with master - slave and there can be multiple slaves so the dev board (or any microcontroller that supports SPI) would be master and the Max chips would be slaves. The master rotates around the slaves to grab the data.
This arduino.cc/en/Reference/SPI explains how arduino does this but it is common protocol.
Maybe we can start a new thread on this subject. Do we have an amateur electronics section ;-)
Fired up again today. The dome temperature reached 400C much quicker in less than an hour. I kept it between 430 and 500C for another 1.5 hours just getting my son to throw on the odd log while I fashioned a door from some 3 inch thick bits of pallet.
The last door I made was cut to the shape of the opening. In retrospect I have no idea why I did it that way. This time I cut out a template from a spare bit of chipboard and marked on the opening and took a keyhole saw (old blade) to it... Now the door fits perfectly. The new door is slightly smaller to make room for the damp teatowel and tinfoil that I wrap the door in to give me a good seal round the edges and to stop the door from burning.
After letting the flames burn out the temp of the dome went from around 450C down to around 300C after about 2 hours of pizza/flammenkuchen cooking. The floor surface was at 420 as the flames died but this dropped when I pushed the coals to the sides dropped to about 350C. The temp of the underside of the floor bricks was 280 by this time and this stayed fairly constant. The floor top surface dropped in temperature with every pizza although it bounced back in between pizzas. After cooking I left the oven to cool a little, the dome temp came down and the floor temp went up and they met at around 250C which is when I wedged in the new door. I opened up again a little later to put in a some well marinated topside and about and hour later a nice piece of marinated pork. That's lunch for tomorrow sorted :-)
Just checked the temps and the dome and 3hrs later, the dome is still reading 190C and the floor 182C above and 186C below. Under the under floor insulation is now 18C it never went above 37C while the rest was blazing away.
The doorway and where the chimney meets the inner dome are still the main areas of heat loss.. a lot less than before, but heat loss all the same... I'll have to think on fixing those...
This arduino.cc/en/Reference/SPI explains how arduino does this but it is common protocol.
Maybe we can start a new thread on this subject. Do we have an amateur electronics section ;-)
Fired up again today. The dome temperature reached 400C much quicker in less than an hour. I kept it between 430 and 500C for another 1.5 hours just getting my son to throw on the odd log while I fashioned a door from some 3 inch thick bits of pallet.
The last door I made was cut to the shape of the opening. In retrospect I have no idea why I did it that way. This time I cut out a template from a spare bit of chipboard and marked on the opening and took a keyhole saw (old blade) to it... Now the door fits perfectly. The new door is slightly smaller to make room for the damp teatowel and tinfoil that I wrap the door in to give me a good seal round the edges and to stop the door from burning.
After letting the flames burn out the temp of the dome went from around 450C down to around 300C after about 2 hours of pizza/flammenkuchen cooking. The floor surface was at 420 as the flames died but this dropped when I pushed the coals to the sides dropped to about 350C. The temp of the underside of the floor bricks was 280 by this time and this stayed fairly constant. The floor top surface dropped in temperature with every pizza although it bounced back in between pizzas. After cooking I left the oven to cool a little, the dome temp came down and the floor temp went up and they met at around 250C which is when I wedged in the new door. I opened up again a little later to put in a some well marinated topside and about and hour later a nice piece of marinated pork. That's lunch for tomorrow sorted :-)
Just checked the temps and the dome and 3hrs later, the dome is still reading 190C and the floor 182C above and 186C below. Under the under floor insulation is now 18C it never went above 37C while the rest was blazing away.
The doorway and where the chimney meets the inner dome are still the main areas of heat loss.. a lot less than before, but heat loss all the same... I'll have to think on fixing those...