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Thursday, May 11

  1. page Adjustable constant current source edited ... designing and testing testing, adjustable current The current source introduced in this a…
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    designing and testingtesting, adjustable current
    The current source introduced in this article is capable to handle current up to 6A with maximum input voltage of 50V. This is an operational amplifier based adjustable current source and it uses LM358 in a general voltage follower configuration. To handle large currents we use four 0.1Ω 20W resistors as "load resistor", and those load resistors are drive through pair of 55N06 N-channel MOSFET transistors.
    The power supply unit of this project is build around 9V x 2 (2A) step-down transformer and it is design to get regulated 12V DC voltage. In our design this 12V power source is used to drive LM358 Op-Amp and 12V cooling fan.
    (view changes)
    6:54 am
  2. page Adjustable constant current source edited ... The power supply unit of this project is build around 9V x 2 (2A) step-down transformer and it…
    ...
    The power supply unit of this project is build around 9V x 2 (2A) step-down transformer and it is design to get regulated 12V DC voltage. In our design this 12V power source is used to drive LM358 Op-Amp and 12V cooling fan.
    {https://farm5.staticflickr.com/4163/33749838064_45e25d4fed_z_d.jpg} Internal view of adjustable current source prototype.
    ...
    for both 0.1R0.1Ω load resistors
    Project Related Downloads
    Schematics, PCB designs and wiring diagrams of Adjustable constant current source
    (view changes)
    6:50 am
  3. page home edited ... Modified Heathkit HD-1410 electronic keyer μPC1237 based 2 channel speaker protector Adjust…
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    Modified Heathkit HD-1410 electronic keyer
    μPC1237 based 2 channel speaker protector
    Adjustable constant current source
    [[include component="tagCloud"]]
    (view changes)
    6:40 am
  4. page Adjustable constant current source edited ... The current source introduced in this article is capable to handle current up to 6A with maxim…
    ...
    The current source introduced in this article is capable to handle current up to 6A with maximum input voltage of 50V. This is an operational amplifier based adjustable current source and it uses LM358 in a general voltage follower configuration. To handle large currents we use four 0.1Ω 20W resistors as "load resistor", and those load resistors are drive through pair of 55N06 N-channel MOSFET transistors.
    The power supply unit of this project is build around 9V x 2 (2A) step-down transformer and it is design to get regulated 12V DC voltage. In our design this 12V power source is used to drive LM358 Op-Amp and 12V cooling fan.
    {https://farm5.staticflickr.com/4163/33749838064_45e25d4fed_z_d.jpg} Internal view of adjustable current source prototype.
    In our PCB design we did not include high current paths into PCB track layout. We connect all of of those connections using point-to-point wiring. Large heatsink is recommended for both 0.1R load resistors and for 55N06 MOSFET transistors. In our prototype design we use 250mm x 72mm x 50mm heatsink to mount all of those resistors and transistors. To transfer heat we also attach standard 80mm cooling fan into our enclosure.
    Project Related Downloads
    (view changes)
    6:37 am
  5. page Adjustable constant current source edited ... The power supply unit of this project is build around 9V x 2 (2A) step-down transformer and it…
    ...
    The power supply unit of this project is build around 9V x 2 (2A) step-down transformer and it is design to get regulated 12V DC voltage. In our design this 12V power source is used to drive LM358 Op-Amp and 12V cooling fan.
    In our PCB design we did not include high current paths into PCB track layout. We connect all of of those connections using point-to-point wiring. Large heatsink is recommended for both 0.1R load resistors and for 55N06 MOSFET transistors. In our prototype design we use 250mm x 72mm x 50mm heatsink to mount all of those resistors and transistors. To transfer heat we also attach standard 80mm cooling fan into our enclosure.
    Project Related Downloads
    Schematics, PCB designs and wiring diagrams of Adjustable constant current source
    References
    LM358 - Low-power, dual-operational amplifier
    55N06 - 60V N-Channel MOSFET
    7812 - 3-Terminal 12V 1A positive voltage regulator

    (view changes)
    6:34 am
  6. 6:32 am
  7. page Adjustable constant current source edited When comes to electronic designing and testing adjustable current sources facilitates to simulate …
    When comes to electronic designing and testing adjustable current sources facilitates to simulate "load" on circuit(s). The most common use of "constant current source" is to test performance of power supply units and battery packs.
    The current source introduced in this article is capable to handle current up to 6A with maximum input voltage of 50V. This is an operational amplifier based adjustable current source and it uses LM358 in a general voltage follower configuration. To handle large currents we use four 0.1Ω 20W resistors as "load resistor", and those load resistors are drive through pair of 55N06 N-channel MOSFET transistors.
    The power supply unit of this project is build around 9V x 2 (2A) step-down transformer and it is design to get regulated 12V DC voltage. In our design this 12V power source is used to drive LM358 Op-Amp and 12V cooling fan.
    In our PCB design we did not include high current paths into PCB track layout. We connect all of of those connections using point-to-point wiring. Large heatsink is recommended for both 0.1R load resistors and for 55N06 MOSFET transistors. In our prototype design we use 250mm x 72mm x 50mm heatsink to mount all of those resistors and transistors. To transfer heat we also attach standard 80mm cooling fan into our enclosure.

    (view changes)
    6:24 am

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