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Service Forum
support board, PC repair, unlocking solutions
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thesanman112
Nou Venit
Joined: 14 Mar 2006
Posts: 3
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 Posted: Tue Mar 14, 2006 4:38 am Post subject: design of com1 interface? |
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hello, I am trying to figure out hot to build the com1 type interface to make an eeprom reader for thinkpads. I seen in somer pics in this forum it just requires a com1 socket and a few resistors? is this correct? I only wish to retrieve the passwords form thinkpads. Do I need a max232 chip in the itnerface circuit? Is there a link to a proper schematic?
I seen the breadboard diagram wich looks good but there is no designation of the com1 pins??!!
From what I have read in this forum it seems victor is the man! Its amazing what you have accomplished!
Any help would be greatly appreciated. |
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bob
S.F. Moderator
Joined: 07 Mar 2004
Posts: 789
Location: Staff
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| Posted: Thu Mar 16, 2006 8:23 am Post subject: |
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You can find the schematics inside the reader kit.
max232 circuit is better than SIPROG, because SIPROG depends on the COM port current. But SIPROG works and is a fast solution.
If you are a tech and program chips more often, driven circuit is the best choice. |
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