reddyc

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About reddyc

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  1. Hey jaclaz what should be the output voltage at TTL end( 3.3 v or 5v) ...which one shd i get? http://www.embeddedmarket.com/products/USB-to-TTL-Converter-Module/ http://www.embeddedmarket.com/Products/RS232-to-TTL-Converter/ Thanks for your HELP
  2. ohh...thanks for your quick reply... i will now get the RS-232 TTL converter(3.3v). Can you tell me how to test my PCB now ? ... before investing on the new RS-232 TTL converter.. i need to check my PCB as you said i could have fried my PCB i could still feel that my drive is spinning with my PCB... please suggest on what needs to be done from here?
  3. Hi i have tried lowering the baud rate too... but did not see any response from the terminal window... im using this cable http://www.rs232-converters.com/single_usb_to_rs232_converter.htm will this not communicate? please help
  4. Jaclaz I need your help in fixing my laptop drive(seagte momentus 7200.4, 320 GB). i thing my drive is affected with the BSY error( drive is spinning but not detected in BIOS). i bought a USB to RS232 cable to communicate with the drive from hyperterminal. Here is what i have done : 1) Removed the PCB and covered the head contacts with a business card and tightened the PCB back. 2) Identified the RX, TX, GND signals from the serial port of the USB TO RS232 adapter. 3) with the tutorials gone through, assumed the terminals just beside the SATA port of the hard drive are RX, TX , GND ( in the same order) & connected the RX TO TX and TX to RX and GND TO GND. 4) opened the hyperterminal and made the settings to 38400/8/N/1/N and entered into the hyperterminal console. 5) Here ctrl+z does not work at all. i tried typing all the characters but the console keeps dumb. ( i could do the loopback test with RX & TX) am i doing anything wrong? how to diagnose the problem with the hyperterminal and hard drive communication. please help me jaclaz, i have read your posts and you gave brilliant solutions. hoping you would help me too!! Thanks Chandrapal Reddy
  5. Hey jaclaz , i tried lowering the baud rate too, but no use i could check the loopback test with my USB to RS232 adapter, but unable to get the command prompt in the hyperterminal window. also, i just wanted to confirm whether do we need to cover the head contacts or the motor contacts with the plastic card? and also, is there any change in the terminals(RX,TX,GND) of the pcb board for the laptop hard drives? please help in this regard Thanks Reddyc
  6. MY Seagate momentus 7200.4 (ST9320423AS, 320GB) laptop hard drive has BSY problem similar to that of barracuda model 7200.11 ( My drive is not getting detected in BIOS, my drive is spinning fine with no weird noise or ticking sound.i tested my drive in other machines but no use.) . I bought RS232 TTL converter and tried to fix the BSY error. in the hyperterminal window, ctrl+Z seems to be not working at all for my drive. Do i need to change any other settings for this model hard drive ? can anyone please help me on this. your help would be appreciated. Chandrapal Reddy
  7. MY Seagate momentus 7200.4 (ST9320423AS, 320GB) laptop hard drive has BSY problem similar to that of barracuda model 7200.11 ( My drive is not getting detected in BIOS, my drive is spinning fine with no weird noise or ticking sound.i tested my drive in other machines but no use.) . I bought RS232 TTL converter and tried to fix the BSY error. in the hyperterminal window, ctrl+Z seems to be not working at all for my drive. Do i need to change any other settings for this model hard drive ? can anyone please help me on this. your help would be appreciated. Thanks Chandrapal Reddy