Search the Community

Showing results for tags 'power supply'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • News
    • New Users Introduction
    • Announcements
  • Digilent Technical Forums
    • FPGA
    • Digilent Microcontroller Boards
    • Non-Digilent Microcontrollers
    • Add-on Boards
    • Scopes & Instruments
    • LabVIEW
    • Other
  • General Discussion
    • Project Vault
    • Learn
    • Suggestions & Feedback
    • Buy, Sell, Trade
    • Sales Questions
    • Off Topic
    • Educators
    • Technical Based Off-Topic Discussions

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Location


Interests

Found 6 results

  1. Waveforms allows the user to turn the power supplies on and off, and set the voltage for the Analog Discovery 2. How do you do this with the SDK? Also, what is the default setting? I cannot find anything in the documentation. Thanks!
  2. I've been thinking about designing and building my own bench-top power supply for general use. I envision the primary use to be with prototyping low-power analog/digital circuits with the occasional small DC motor and other electro-mechanical devices. The primary reason I'm doing this is to become more familiar with power supply design, and having a useful bench-top supply is an added bonus. Target specs and device goals so far, recommendations/suggestions are welcome: 1. Powered from mains electricity (I live in the US, so I'm targeting ~120VAC@60Hz). 2. Mains isolated. 3. Variable voltage and current output, at least 1A max output current and 12V max output voltage. Preferably I'd like a 15V or 24V max output voltage as well as split supply, though these aren't critical specs. 4. Decent efficiency. I haven't quite spec'd out a target efficiency yet, but I would expect greater than 50% efficiency. I've heard of SMPS supplies going up to ~80-90%, possibly higher. Since this is taken as primarily a learning exercise, I've been seriously considering if I should turn this project into one where I can learn more about using mains electricity directly. I'm hesitant to do so because I understand the very real danger involved with getting something wrong on mains and I could use a wall adapter (either AC-AC or AC-DC) or pre-built constant voltage unit to power my supply to reduce the risk associated with working with mains. I'm curious as to what you guys think about this, as well as any recommended resources I should check out before working with mains directly. If you have any suggestions for projects which would be better suited for a beginner working directly with mains that'd be great, too. If I did choose to go with the direct mains method I think I'd starting out with a basic transformer KY286-53030C(datasheet:http://www.kynix.com/uploadfiles/pdf/53030C.pdf) to provide isolation and reduce the input voltage, then use some circuitry to get adjustable voltage/current. The basic interface with the mains: [/img] The main side is tied across the one side of the transformer, and the powered circuit is tied to the other side. The signal is then rectified through a diode bridge, and the output is filtered using a large capacitor in parallel with the load. If I wanted to, later down-stream I could use circuitry to further regulate the output voltage and current (something similar to what is done here). The voltage across the load should be (assuming a sufficiently small load or large capacitor, as well as a near-ideal transformer): VL=Vmain⋅N2N1−2∗VDVL=Vmain⋅N2N1−2∗VD Where Vmain is the amplitude of mains electricity (~170 V in the US). This is a basic design which works in theory, but what real-world considerations do I have to take into consideration when designing the actual interface with the mains electricity? I know that a highly capacitive or inductive load will result in a poor power-factor, but since this is a general purpose power supply I'm assuming that whatever load gets attached down-stream will be designed to compensate for that rather than try to have the power supply do the compensation. An alternative approach is to use a switched-mode design, but I haven't found many useful resources on how to design/implement one. From what I understand a SMPS uses much higher frequencies so the transformer can be smaller while still providing a semi-stable DC output. What I don't understand is how you're suppose to take the 60Hz signal from the wall and up that to a ~10kHz or even ~1MHz input for the SMPS transformer.
  3. I am trying to control the analog discovery 1 with MatLab commands for the project that i am on. We can control everything except the +-5v power supply. We need it to power an op-amp we have in the circuit. Does anyone know the MatLab command to turn on the Power Supply in the Analog Discovery?
  4. I'm getting a myProto Protoboard in the mail tomorrow, and I can't tell what the connector type is for the external power supply. All I can see is that there is a max of 17VDC. What connector is used here? And is there a supplied external power supply to wall power, or should I be purchasing one? Thanks!
  5. Vadim Lazarev

    Analog Discovery 2 power supply

    Which external power supply is compatible with the Analog Discovery 2 to deliver 700mA of current? There are at least 2 power supplies in the Accessories section, but neither mentions compatibility with the Analog Discovery 2 kit. It would be nice if the webmaster could add this item under the "Related Products" section for the Analog Discovery 2, so it would be easier for people to find it. Thank you for your time.
  6. nickh

    Arty Power supply

    The Arty user's manual says "An external power supply can be used by plugging into Power Jack J12 and installing a jumper in the “REG” position on Header J13. The supply must use a coaxial, center-positive 2.1mm (or 2.5mm) internal-diameter plug, and provide a voltage of 7 to 15 Volts DC. The supply should provide a minimum current of 1 amp. Ideally, the supply should be capable of providing 36 Watts of power (12 Volts DC, 3 amps). A suitable external power supply can be purchased from Digilent. " Where is the "suitable external power supply"? A search of the Digilent site does not show one. The above text does not give a part number. (The text should be amended to include part number). Second question: the center-positive 2.1mm connector allows perfect fit for the 5V power supply that Digilent has used on many other Xilinx kits (Spartan 3x Starter among others), yet 5V does not work. Why was the 2.1mm connector selected when it is normally 5V? Was testing done to insure that when a 2.1mm 5V power supply is connected there is no damage to the circuit as it is out of range but easily connected. More Questions or more detail on the second: Why was Arty designed so that it could not use the available 2.1mm 5V supplies which are very common (I have a least a half dozen and have given at least that many more away) and instead a 7 to 15V 2.1mm supply which I am finding to be uncommon? Why the higher voltage at all? Thank You Nick H