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Sunday, March 11

  1. page Automatic fan controller for server racks edited In this post we describe fan controller which we designed for our 9U wall mount server cabinet. Thi…
    In this post we describe fan controller which we designed for our 9U wall mount server cabinet. This fan controller is designed to drive a 12V DC cooler fan with pre-configured intervals or by monitoring the temperature of the server cabinet.
    {https://farm5.staticflickr.com/4781/38933511880_7a892b8310_z_d.jpg} Final version of fan controller with DC brushless fan and 12V - 60W PSU.
    ...
    cooler fan betweenfrom 1-minute and up to 4-hour.
    In this design LM35 temperature sensor is used to activate cooler fan in specified temperature. This sensor stage is useful to drive cooler fan when timer stage is in inactive state.
    To control the cooler fan we use AP9971 dual N-channel power MOSFET transistor. We design this system to drive 12V cooler fans up to 2A of current. To test this controller we use commonly available 120mm × 120mm, 12V - 300mA brushless DC fan. In our server cabinet we mount this fan to push hot air out of the cabinet.
    (view changes)
    4:14 am
  2. page home edited ... Yet another CXA1191 FM radio receiver Network cable tester Automatic fan controller for ser…
    ...
    Yet another CXA1191 FM radio receiver
    Network cable tester
    Automatic fan controller for server racks
    [[include component="tagCloud"]]
    (view changes)
    4:06 am
  3. page Automatic fan controller for server racks edited In this post we describe fan controller which we designed for our 9U wall mount server cabinet. Thi…
    In this post we describe fan controller which we designed for our 9U wall mount server cabinet. This fan controller is designed to drive a 12V DC cooler fan with pre-configured intervals or by monitoring the temperature of the server cabinet.
    {https://farm5.staticflickr.com/4781/38933511880_7a892b8310_z_d.jpg} Final version of fan controller with DC brushless fan and 12V - 60W PSU.
    Core components of this fan controller is CD4060 binary counter, LM35 temperature sensor and LM358 operational amplifier. In this design CD4060 is used as long duration timer and it can configured to trigger cooler fan between 1-minute to 4-hour.
    In this design LM35 temperature sensor is used to activate cooler fan in specified temperature. This sensor stage is useful to drive cooler fan when timer stage is in inactive state.
    (view changes)
    3:57 am
  4. 3:48 am
  5. page Automatic fan controller for server racks edited ... This fan controller is designed to work with 12V - 1A (or higher) power supply. For the testin…
    ...
    This fan controller is designed to work with 12V - 1A (or higher) power supply. For the testing and for the final installation, we use 12V - 60W power supply unit which is commonly used for LED lightning projects.
    Supplied PCB design of this controller is 64mm × 63.5mm and it based on standard through-hole type components.
    Project Related Downloads
    Schematics and PCB design of the server fan controller.
    References
    LM35 - ±0.5°C Temperature sensor with analog output.
    LM358 - Dual operational amplifiers.
    CD4060 - CMOS 14-stage ripple-carry binary counter/divider and oscillator.
    AP9971 - Dual N-channel enhancement mode power MOSFET

    (view changes)
    3:46 am
  6. page Automatic fan controller for server racks edited In this post we describe fan controller which we designed for our 9U wall mount server cabinet. Th…
    In this post we describe fan controller which we designed for our 9U wall mount server cabinet. This fan controller is designed to drive a 12V DC cooler fan with pre-configured intervals or by monitoring the temperature of the server cabinet.
    Core components of this fan controller is CD4060 binary counter, LM35 temperature sensor and LM358 operational amplifier. In this design CD4060 is used as long duration timer and it can configured to trigger cooler fan between 1-minute to 4-hour.
    In this design LM35 temperature sensor is used to activate cooler fan in specified temperature. This sensor stage is useful to drive cooler fan when timer stage is in inactive state.
    To control the cooler fan we use AP9971 dual N-channel power MOSFET transistor. We design this system to drive 12V cooler fans up to 2A of current. To test this controller we use commonly available 120mm × 120mm, 12V - 300mA brushless DC fan. In our server cabinet we mount this fan to push hot air out of the cabinet.
    This fan controller is designed to work with 12V - 1A (or higher) power supply. For the testing and for the final installation, we use 12V - 60W power supply unit which is commonly used for LED lightning projects.
    Supplied PCB design of this controller is 64mm × 63.5mm and it based on standard through-hole type components.

    (view changes)
    3:35 am

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