Pro/Forums - View Single Post

Bruno Facca · 10-10-2002, 08:15 PM

Please take your time to read the whole post, I need help with some issues and I would appreciate any information on these subjects very much.

Thanks for the warning, I tought it was only top and bottom layers.

In the city where I live I can't get any kind of thermal sensors, no thermistors, thermocouples, thermal diodes, nothing! I got a flat thermistor (very thin) from an old slot A motherboard, I couldn't find any specs for it so I did some testing, here is the result:
Temperature in celsius - resistance in Kohms
0 C - 29.1 K
36.5 C (body temp) - 6.95 K
100 C - 1.05 K

If anyone can help me identify/use it or has a schematic for a circuit that reads from this and converts the resistance to temperature (no PICs) it would be great.

I took my processor off and looked at the "inside"of the socket, there is no thermal sensor in there like I see in some other boards, there's just a bunch of surface mount resistors and a couple of very tiny 8 pin ICs, I assumed these were not temp sensing IC's because they're close to the borders of the socket instead of in the middle and the motherboard has more of these than I can count. Does that mean my mother board reads from the internal diode (I don't think so but I can't think of something else to explain the lack of a temp sensor in there)? I have a Soyo Dragon +.

The only idea I have left is getting one of those digital thermometers used to measure fever, take it apart, put a long wire in the thermistor and use it, after all my CPU temp at full load (measured by the mother board diode or whathever the hell there is in there is 37C) is almost the same as body temp . Any other ideas for temp measurement are also welcome.

Now changing subjects, the copper from the blocks didn't "like" the laque at all, it didn't "catch on" so there will be no laque, if you don't touch the block with your bare hands (we have fat and acid in our hands) it should be a long time without getting darker..

I have some pics of the finished blocks and tops, that are now painted, I know there are some dust spots in the painting but as I told you before, this is beta, it was applied 3 layers of base paint, 2 layers of the gray paint and 2 layers of laque to protect the painting. here they are:

There is something I forgot to mention. If you have been following this thread you saw the pictures I of the little "flaws" I posted before, those small metal accumulations were caused by a piece of each mold (some of them) that "broke" because the copper was poured a little too fast. The "broken" pieces of the molds had to go somewhere, most of it went to the bottom of the molds, not affecting the copper block, but in some blocks, some of it didn't have time to go all the way down before the copper got rigid so it stayed trapped in the copper, as I said, it was a really small ammount of molding material so it only affect the looks of the bottom of the block (some black spots), it doesn't affect performance at all because it's too little to do it. I tested all of the blocks, some of them had this some didn't and one of them had more than any other, this is the block oin the bottom left of the picture showing the blockis reflecting the money and they performed the same (at least no difference bigger than 1C, my thermal diode doesn't measure fraction of degrees).
I hope you like the blocks.

@MadDogMe: I would like to have one of those but they're too expensive for me right now, maybe when I start getting some good profit I'll get one.

@Mark_Knecht: I'm glad you liked it

@gmat:I have no international credit card yet, I'll get one as soon as I have the time to get some needed papers, this project is keeping me very busy. Also it would probably take some time before it got here. Temp measurement is tricky stuff

Thanks
Bruno

10-10-2002, 08:15 PM	#92
Bruno Facca Cooling Neophyte Join Date: Jul 2002 Location: Brazil Posts: 70	Please take your time to read the whole post, I need help with some issues and I would appreciate any information on these subjects very much. Thanks for the warning, I tought it was only top and bottom layers. In the city where I live I can't get any kind of thermal sensors, no thermistors, thermocouples, thermal diodes, nothing! I got a flat thermistor (very thin) from an old slot A motherboard, I couldn't find any specs for it so I did some testing, here is the result: Temperature in celsius - resistance in Kohms 0 C - 29.1 K 36.5 C (body temp) - 6.95 K 100 C - 1.05 K If anyone can help me identify/use it or has a schematic for a circuit that reads from this and converts the resistance to temperature (no PICs) it would be great. I took my processor off and looked at the "inside"of the socket, there is no thermal sensor in there like I see in some other boards, there's just a bunch of surface mount resistors and a couple of very tiny 8 pin ICs, I assumed these were not temp sensing IC's because they're close to the borders of the socket instead of in the middle and the motherboard has more of these than I can count. Does that mean my mother board reads from the internal diode (I don't think so but I can't think of something else to explain the lack of a temp sensor in there)? I have a Soyo Dragon +. The only idea I have left is getting one of those digital thermometers used to measure fever, take it apart, put a long wire in the thermistor and use it, after all my CPU temp at full load (measured by the mother board diode or whathever the hell there is in there is 37C) is almost the same as body temp . Any other ideas for temp measurement are also welcome. Now changing subjects, the copper from the blocks didn't "like" the laque at all, it didn't "catch on" so there will be no laque, if you don't touch the block with your bare hands (we have fat and acid in our hands) it should be a long time without getting darker.. I have some pics of the finished blocks and tops, that are now painted, I know there are some dust spots in the painting but as I told you before, this is beta, it was applied 3 layers of base paint, 2 layers of the gray paint and 2 layers of laque to protect the painting. here they are: There is something I forgot to mention. If you have been following this thread you saw the pictures I of the little "flaws" I posted before, those small metal accumulations were caused by a piece of each mold (some of them) that "broke" because the copper was poured a little too fast. The "broken" pieces of the molds had to go somewhere, most of it went to the bottom of the molds, not affecting the copper block, but in some blocks, some of it didn't have time to go all the way down before the copper got rigid so it stayed trapped in the copper, as I said, it was a really small ammount of molding material so it only affect the looks of the bottom of the block (some black spots), it doesn't affect performance at all because it's too little to do it. I tested all of the blocks, some of them had this some didn't and one of them had more than any other, this is the block oin the bottom left of the picture showing the blockis reflecting the money and they performed the same (at least no difference bigger than 1C, my thermal diode doesn't measure fraction of degrees). I hope you like the blocks. @MadDogMe: I would like to have one of those but they're too expensive for me right now, maybe when I start getting some good profit I'll get one. @Mark_Knecht: I'm glad you liked it @gmat:I have no international credit card yet, I'll get one as soon as I have the time to get some needed papers, this project is keeping me very busy. Also it would probably take some time before it got here. Temp measurement is tricky stuff Thanks Bruno