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Onboard IDE connector, adding resistors (if you want to) (modified 0 times) hardware1 Onboard IDE connector, adding resistors (if you want to): R99 and R100 are pull-ups to +5V, so anything between 1K and 20K would be OK for what we are doing. That would translate to "102" up to "203" in little tiny part numbers. The packs can be from about 22 ohm to maybe 100? 33 was a good choice someone suggested, the IO uses 22 on their IDE. The resistors add RFI "protection" and maybe if you plug in the HD backwards with power on it will save you. That translates to "220" up to "101" in little tiny part numbers. You can find these on old dead $1 swapmeet hard drives and boards if you look. That is why I am saying that the values can vary, it's not all that important since the cable run is very short. This is all 5V logic signals. The ones you see are 33 and 1K, but engineers have this stuff laying around. The pic link again: http://linux-hacker.net/websurfer/images/ide-resistors1.jpg 05-01-2000 03:54:53

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) mADmAX well, could you (someone) please post "digi-key" partnumbers for those 33 & 1K ? thanks, mADmAX 05-01-2000 20:24:57

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) spdracer5g I hate to repeat a previous but, it would be great if somebody could post the digi-key, radioshack whoever part numbers so that we can get these resistor networks. 05-03-2000 12:39:49

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) spartan I ordered the following from Digikey, though I haven't installed or tested them yet. Go online and check out the catalog pages before ordering so you won't be mad if they aren't the right thing. Perhaps someone can verify if these are the right form factor, etc. The individual resistors come in several wattages. Don't just order them blindly. Y7330CT-ND RES ARRAY 33 OHM 5% 4 RES SMD http://rocky.digikey.com/USCatalog/V3/395.PDF P1.1KECT-ND RES 1.1K OHM 1/8W 5% 1206 SMD http://rocky.digikey.com/USCatalog/V3/383.PDF I ordered ten of each for < $4 + $5 shipping 05-03-2000 19:42:08

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) spartan I pulled the cover off the Web Surfer and it looks like the SMD mentioned above is too small. Anyone have other suggestions? 05-03-2000 20:14:57

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) GaTBEE Using a micrometer and a 10 power microscope I decided that the other offering on the same chart was correct. The "Y7330CT-ND RES ARRAY 33 OHM 5% 4 RES SMD" that sparton mentioned is 2.0 mm wide, the Y9330CT-ND is 3.2 mm wide. I read 3.2 mm We will see tonight. (hope I am right, there is a $5 surcharge for orders under $20) 05-04-2000 05:22:35

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) Linuxguru The 1206 resistors are too big, and can be soldered there only with extreme difficulty (they completely obscure the pads). Better would 0603 (ideal) or 0805. The resistor networks are also 0603, but they have smaller pads than the discretes. 05-04-2000 11:37:12

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) GaTBEE The Digikey resister packs referred to above are the correct ones. One set is installed. You need a really small tip on the iron, preferably temperature controlled. A good pair of tweezers are needed. I did the first using a straight pin to control the chip. I don't see how you can do it with out a 10 power microscope. Don't take the chips out of the tape until you are ready to use them, one-at-a-time. They are like dust. The 1k ohm singles are even smaller. And what ever you do don't sneeze before you get on lead soldered. With the chip held over the 8 pads take the fine tip to the solder on the pad and sweep it toward and up the side of the chip. With a little practice you get it the first time. I did sharpen the leads on a Fluke multimeter and check continuity from pad to pad on each of the first set of packs. Missed a few. Also checked for solder bridges. Good luck GaTBEE 05-07-2000 12:12:23

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) GaTBEE Any one looking for Surface Mount Resisters will fine this site interesting: www.pcdmag.com/resources/smt for descriptions of sizes 05-12-2000 22:01:33

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) ohm meter 33 ohm 47 ohm 20 ohm 10 ohm you don't care just get them if you can! Buy a electronics book too while you are at it so you don't have to go through life ignorant and always depending on others to do your work for you. 05-19-2000 21:35:14

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) feslog Profile I used the following Digikey parts: Y9330CT-ND RES ARRAY 33 OHM 5% 4 RES SMD P1.00KHCT-ND RES 1.00K OHM 1/16W 1% 0603 SMD Packages are a perfect fit. IDE works fine w/ 1 device, but flakey with 2 (hd & cd-rom)... suggestions? 01-18-2001 14:21:25

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) Linuxguru Profile | Email R99 and R100 are actually 10 ~ 33 ohm series termination resistors, not 1K as originally reported. It so happens that 1K still works on most notebook hard drives with CMOS inputs, but if you're having flakiness (as I did, on some drives) switch to 10 ohms. 01-19-2001 16:19:53

RE:Onboard IDE connector, adding resistors (if you want to) (modified 0 times) Necrosis Profile | Email Ok, here is what I have done so far with the onboard IDE. I have pirated some pins for the IDE connector from an old sound card, and have all of the pins soldered onto the board, they seem to be correct in that they don't touch anything, and there seems to bee a good connection. When I power on my websurfer the hd will not detect... something I was thinking.... do I need to have the resisters or can I just bridge the connections where the resisters are supposed to be with a drop of solder? Do those connections have to be bridged at all for the IDE to work? Thanks Forget the fountain of youth, what this world needs is a fountain of smart! 04-17-2001 14:29:18

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