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Recent content by andrewkluz

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    Generate Fan RPM Signal W/O Fan

    Glad we did! No not yet. I take pictures in the process (some of the major steps at least) but I didn't build a log. I probably would fit at homeservers.com. @FrankD400: Thank you very much for your input! The current available for each connection has to be at least 3.5A since each fan...
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    Generate Fan RPM Signal W/O Fan

    Mohonri ... Thank you very much!! All I had to do was change the yellow to blue on the simulator I made a week ago and it works perfectly! What a shame ... the standard was perfectly reversed and fooled me. I am sure there will be some one who will come across a DL585 or DL580 fan connector...
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    Generate Fan RPM Signal W/O Fan

    Hello Mohonri Thank you! I was just thinking of that now when I came to read your reply and it just makes sense that the blue must be the tachometer signal. I will test again.
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    Generate Fan RPM Signal W/O Fan

    Thank you!!
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    Generate Fan RPM Signal W/O Fan

    Ok. I didn't get the Oscilloscope from the ad I ended up using the alternative. I used ArduinoScope (https://github.com/iroth/simplearduinoscope) and I have some pictures. First, when the pc is turned on, the fan goes at full rpm and the yellow and blue lines show these images: Blue Yellow...
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    Generate Fan RPM Signal W/O Fan

    I am getting this oscilloscope in Edmonton. http://www.kijiji.ca/v-electronics/edmonton/oscilloscope-cossor-model-cdu110/1069516932?enableSearchNavigationFlag=true#MapLightbox I'm not sure if it is gonna work. Any one knows this brand and make? I never have used oscilloscope before. Thanks
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    Generate Fan RPM Signal W/O Fan

    Thanks Mohonri I must get an oscilloscope and see those wires yes. I just checked the voltage on the blue line and is 2.55V, and on the yellow line it is 0.01V. I need me an oscilloscope. Thanks for the circuit and IC link.
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    Generate Fan RPM Signal W/O Fan

    In the mean time, I am planning to use the system by splitting the yellow tach line to the rest of the fan connections except I read somewhere that there isn't enough power in the tach line and it needs to have a separate circuit to divide it. Do you know how to do this? Any suggestions...
  9. A

    Generate Fan RPM Signal W/O Fan

    In the mean time, I am planning to use the system by splitting the yellow tach line to the rest of the fan connections except I read somewhere that there isn't enough power in the tach line and it needs to have a separate circuit to divide it. Do you know how to do this? Any suggestions? Thanks
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    Generate Fan RPM Signal W/O Fan

    Not quite! I tried that and it didn't work. I am still figuring out what the values of each lines of the fan are
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    Generate Fan RPM Signal W/O Fan

    Thanks Mohonri Your lead led me to: http://homeservershow.com/forums/index.php?/topic/7294-faking-the-fan-signal/ That seems the way to go. If that works, I will make a circuit board to emulate it. Actually, the already made board should suffice. I can't wait to try it. Thanks
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    Generate Fan RPM Signal W/O Fan

    Circuit board on one of the fans. Here is the finless fan!
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    Generate Fan RPM Signal W/O Fan

    I will test the actual fan output with arduino and get some numbers before I proceed. Who knows what is being monitored in these fans.
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    Generate Fan RPM Signal W/O Fan

    Thanks for the reply Mohonri! I will check the link you gave me and see how how I can proceed. I used Arduino to check the rpm of the fake fan I made and I adjusted it to 5300 - 5400 rpm the highest the fan is rated at. Here is the arduino output : RPM = 5400 Hz= 90 RPM = 5400 Hz= 90 RPM =...
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    Generate Fan RPM Signal W/O Fan

    I tried your circuit and made 6 fake fans for the HP DL585 server (apparently I needed only one). I am in the process of converting the server to water cooling and I am at a point of NO RETURN!. It uses six Nidec BETAV VA450DC, Model V34809 fans that according to the specs have a 5300 rpm...
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