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| From: | Baratex (Portugal) | (Thu Nov 25 19:08:53 2004) |
| In this pic i can saw 3 resistor's and in your eskeme you said 2 resistor's ??? | ||
| From: | Edwin van Drunen (admin) | (Sat Nov 27 01:11:27 2004) |
| mmm... it actually are 4 resistors! In my schematic I said that we needed a 2,5 ohm resistance to make a 500 mA current limiter (maximum current is calculated by dividing 1,25 by the resistance in ohms). And the resistance needs to be able to dissipate 0,6 watts of power (power is calculated by multiplying 1,25 with the maximum current in Amperes). So you can use one "big 1 Watt" 2,5 ohm resistor or 2x "medium 1/2 watt" 5 ohm resistor or 4x "small 1/4 watt" 10 ohm resistor in parallel. And if you can't make 2,5 ohms then 2,7 or 3 ohms is ok too, the current limiter will just have a bit lower maximum. It's not really an exact science anyway ;-) |
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| From: | Dami0N | (Tue Nov 30 17:42:35 2004) |
| Aint this fix like the romeo2 fix ??Only with different resistors..And was confirmed NOT to work by its designer. | ||
| From: | Edwin van Drunen (admin) | (Tue Nov 30 23:47:26 2004) |
| The regulator component used here is not at all like in the "romeo2 mod". In the romeo2 mod they used a 7805 and two diodes to create a steady, non-current-limited 6.2 volt power supply. I use the LM317 and a 2.5 ohm resistor to create a 500 mA current limiter with a variable output voltage. This fix has been verified to work and to limit coil currents in case of a Mechacon crash, while still maintaining the system's performace. Here's an independent research document proving this: http://www.ripper3.com/v12_DEAD_BEEF_096.pdf |
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| From: | Edwin van Drunen (admin) | (Tue Nov 30 23:48:40 2004) |
| This fix should be combined with a "reset delay" capacitor and a watchdog that will reset or turn off the PSTwo after a Mechacon crash for best results. | ||
| From: | Dami0N | (Wed Dec 1 18:17:28 2004) |
| Y0 edwin.aint it possible to make a pcb like thing. just to make the install easier..this damn pstwo needs to much soldering for all us modders :)....thnx for the inlightment | ||
| From: | Edwin van Drunen (admin) | (Fri Dec 3 01:36:24 2004) |
| Hehe... I already thought of this and I hope to have them finished before christmas and will try to sell them via some well known and trustworthy internet store ;-) | ||
| From: | Femajocri | (Mon Dec 6 13:48:31 2004) |
| What mod Chip dop you recomend? Matrix Inf. or Ripper3? | ||
| From: | Edwin van Drunen (admin) | (Mon Dec 6 13:56:44 2004) |
| I recommend uding DMS4-Lite or DMS4-Pro! Matrix Infinity causes the Mechacon crash during game boot and even during game play. Ripper 3 is a better chip, but they still they used someone else's code (matrix infinity code) they only added the 2-parallel-pin patching method for higher current throughput. The DMS4 modchip is the only mod that doesn't cause the Mechacon crash, has original code, 2-parallel-pin patching AND Dev.olution feature... in the future even a hard-disc boot method directly from the modchip (DMS4-Pro) when ToxicOS is released. |
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| From: | okidokiss | (Wed Dec 8 00:05:52 2004) |
| I've chiped a v12 with dms4 pro, with diodes and PIC (matrix fix) ... the laser was damaged too :( | ||
| From: | josema .spain | (Wed Dec 8 00:24:49 2004) |
| hello my fuse ps11 is FCC32 252 AD.your fuse ps11 is CCP 2E63. With my fuse I have also that to use your method??????????. in my pstwo mainboard This one drawn PS3 PS4 PS11 CCP 2E63 or FCC32 252 AD. thanks and sorry for my horrible inglish. |
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| From: | josema .spain | (Wed Dec 8 00:53:33 2004) |
| ups,I buy my pstwo the last week.the new series of playtwo don΄t have this problem with voltage???? | ||
| From: | josema.spain | (Wed Dec 8 01:42:39 2004) |
| Last question :-) In your mainboard i can see MF-MSM125 or MINI SMDC125. in my mainboar i can see PS3 PS4 PS11 CCP 2E63 or FCC32 252 AD. PS3 PS4 Y PS11????i have 3 fuses??? also need to modify my plate with a regulator lm317???? thak you |
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| From: | viclordbelial | (Wed Dec 8 18:16:04 2004) |
| For the matrix, thay post a news the 1 dec to contradict the ripper theorie. Thay said that actel chip thay use drive more power to each pin. | ||
| From: | andy2001_99@yahoo.co.uk | (Thu Dec 9 13:31:45 2004) |
| Hi there , can you confirm if this solution is as good as yours. Ps good work!!!! http://www.hardstore.com/default.asp?l=2&cmd=getNews&cmdID=2225 |
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| From: | Edwin van Drunen (admin) | (Thu Dec 9 20:14:02 2004) |
| (1) My "fix" can be applied on all V12 motherboards disregarding the type of fuses or other components that are used! (2) Solutions that use only voltage regulators will not work, currents can still get too high. There is a downside to this solution too and that is that when you have to increase the max. current too high (because of cheap motors in the PSTwo) it's also less effective. (3) Whatever the matrix team says about their Actel chips, the output impendance is still much higher than for two pins combined. and finally (4) You should all use this fix as a temporary solution, because the diode fix is useless and the PIC can not yet respond and turn off the console in ALL occasions of a long-term DC voltage on the coils. I'm working on a new solution, the "vanDrunen Fix v2" and more details can be found in another "photo album" in this gallery (soon). | ||
| From: | josema.spain | (Fri Dec 10 02:41:49 2004) |
| thank you | ||
| From: | prripp@hotmail.com | (Fri Dec 10 12:00:53 2004) |
| Hi, congratulations, excellent works. My problem is Mechacon crash (I believe)because ALL the original or copy PS1 games stopped in boot and also some original or copy PS2 (fews). I use your fix with one 2,2 ohm 1W resistor (don't find 2,5 ohm) and a matrix infinity dot blue v. 1.38 chip. My question is: if I use 1,8 ohm 1W resistor the limitation is 700 mA, (less protection but more current for lens), the PS1 cd's not hang?. My play is V12 buyed 3 days ago. Many thanks. |
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| From: | prripp@hotmail.com | (Fri Dec 10 12:03:20 2004) |
| Sorry, another question. Your V2 fix already soon?. You use the same components?. B.R. |
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| From: | Edwin van Drunen (admin) | (Mon Dec 13 00:10:13 2004) |
| My new fix will use code from the Matrix fix combined with some code that can monitor the currents going through the tracking coil and if needed can decrease or stop any current through it. It will use a PIC 12F675 processor, which is reflashable and can be upgraded. I will maybe later recode the new fix to 12C508, if possible. | ||
| From: | Diesel | (Mon Dec 13 04:52:55 2004) |
| Amazing work, Now I am wondering, my system has the DMS4 Lite, and a diode fix, I have the 12C508a PIC with matrix code (so I was told) but it is not installed yet. If/When you recode your newer update, is it possible to use something like a JDM programmer and reprogram this chip with your code? Also will it hurt the system by leaving the diode fix on? (even if it does nothing) So Diode Fix, your current limitor fix, and your new PIC fix, ok ? or should i take out the diodes? Thank you again ! |
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| From: | Diesel | (Mon Dec 13 08:42:50 2004) |
| Ok I understand you are now doing something new, and it would make sense to get rid of the diode fix now. Looking forward to seeing the new stuff, and experimenting on my system :) |
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| From: | Weeb@gawab.com | (Fri Dec 17 18:55:45 2004) |
| Hi, Is there any need for both the vanDrunen_Fix 1 and 2? is one better than the other? or should i apply both? |
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| From: | Mr. Black | (Tue Dec 28 12:30:04 2004) |
| Hi. I got a "Matrix Infinty HB" and i'm waiting for a real working fix for my v12. Can i use the ToxicOS with my Chip too? My chip support HomeBrew softwares. Please make a Final-fix, so i can use my PStwo. Happy new Year @ all |
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| From: | modding | (Sun Jan 2 14:12:49 2005) |
| Great work. I have a question... maybe a silly question ... :) What the hell is the mechacon crash ?? |
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| From: | pete | (Wed Jan 5 09:46:06 2005) |
| hi there wen will the fix be added to a pcb like the matrix fix diode psb thanks. | ||
| From: | pete | (Wed Jan 5 14:34:36 2005) |
| hi there is there any other fix needed with this one thanks. | ||
| From: | henk | (Mon Jan 17 14:37:16 2005) |
| hoi,edwin er is ook een pcb fix van jouw oplossing maar ik weet niet hoe ik deze moet installeren,er zijn geen foto`s van te vinden.james007bont@freemail.nl | ||
| From: | Chris from POLAND | (Sat Apr 16 12:06:05 2005) |
| Mr. vanDrunen. I have a important question for you. I buy a 4 resistors and they have together 2Watt. Can use with resistors with LM317. Does it works. I have not use ps2two. | ||
| From: | jcatena | (Thu Nov 23 02:55:39 2006) |
| I wouldn't use a LM317 because its high dropout and dissipation. There are much better ways described in the following comments: |
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| From: | jcatena | (Thu Nov 23 02:57:14 2006) |
| 1) 500 mA autorecoverable fuse replacing PS11. 2) Drive low the inhibit pin (47) of the driver chip. 3) Mosfet switch (or even bipolar would be much better than LM317) driven by PP comparator sensing the current with rectified positive feedback to keep it latched after the overcurrent. |
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