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Found 19 results

  1. nak

    nexys A7 not power on

    The nexys A7 100t board cannot be power on after I try to switch power jumpers. I measured R287 which is not shorted to ground. Any advice on which part I should look into? Thanks.
  2. I purchased a PMOD-BT2 recently and since (according to your documentation) the SPI connector uses the same power as the regular PMOD connector, I though I could just connect it via the SPI header (not supplied), for programming. Strangely enough, the FPGA board (a Nexys4-DDR) would not power up. An investigation reveals a strange fact: according to an ohm-meter the power on the SPI header is reversed compared to your documentation. I would appreciate it if someone from Digilent could confirm this from the PCB schematics and update your documentation ASAP, as well as issue an errata, because c
  3. Hello, I just opened my new basys3 board (novice EE student). As per the documentation I tried to power the board via usb-b (port j4) first through a laptop usb then through a 5v 2A charger making sure the jp2 jumper was set on usb and jp1 to the spi flash test program but the board did not turn on (not even the power good led). Trouble shooting that I performed: 1. Changed cable twice (didn't work) 2. Changed charger and usb ports (didn't work) 3. Powered board from external 5v power supply - the board worked perfectly. My question is could the smd sold
  4. Hi What is the typical power consumption of cmod s7 board ?
  5. we currently have the analogue discovery unit we are trying to set up a data logger to allow us to measure frequency at 3dp eg 50.124hz at 100ms for 35 minutes but the maximum seems to be 18 minutes but we can get round this by writing java script ? we also want to measure an analogue input to convert as a MW value. in the maths function we would like to work out the script to allow us to convert 10v to say 11KV? a binary triger to set the logger to start recording. but where struggling with script who can we chat to on here to assist me w
  6. I am looking to use the JTAG-SMT2 module in a design. After reading the reference manual, I am noticing that there is no spec for power consumption. I need to know the maximum current draw of the device. Can anybody help me figure this out? Thanks!
  7. Hello! I bought PINQ-Z1 and I liked your solution, to use as a power supply chip TPS65400. I decided to use this chip in my solution. Could you explain how you calculated the values of the elements of the compensation scheme for TPS65400 (C167, C168, C172, C173, C179, C180, C184, C185, R252, R255, R262, R265). Thank you!
  8. It appears that the AD2 power supply selection does not automatically switch to external power when plugging it in after it has already been connected via USB. 1. Connect the AD2 via USB cable 2. Start waveforms2015 3. Connect external power supply(5V -3.5A) From time to time a failure appears like DptiIO failed ERC: 0xA. On Linux this issue is made worst by the fact that it appears a lot more often than on Windows even in the middle of operation of the device. This appears even without the external power supply. Something similar appears on Linux saying that the USB p
  9. khiz

    Zybo won't power on

    Hello, I have a zybo board that wont power on. I have tried to power it with an external power supply as well as with a usb cable. i would appreciate if anyone could provide me with some trouble shooting tips. I am a student and need the board for my project. it worked previously but it just wont work now. (PGOOD doesn't turn on)
  10. Hello, I got an Arty board about two months ago and I'd like to use the power supply monitor feature. My main question is: "what's the appropriate sampling rate" Never used a 7 series FPGA before so I started reading through the XADC user guide [UG480] and the Driving the Xilinx Analog-to-Digital Converter [XAPP795] note. From what I understand (correct me if I'm wrong): Both inputs must be set to unipolar The XADC should be operated in simultaneous sampling mode to sample both voltage and current at the same time No auto-calibration in this mode. Calibration is don
  11. Hello, I have a question about the current supply measurement circuit: Why the REF pin of the INA199 is connected to a resistive divider? The REF voltage is obtained dividing the 3.3V with resistors of 6.34K and 100 Ohms. Is it possible to tie REF to GND? Thanks!
  12. Hi, I'm reviewing Waveforms 2015 on Mac. I'm looking at the power supply window and had a few questions. 1. Is it possible to do 3.3V? I see 3V and I see 4V, but not the option to select 3.3V. 2. If I have an external power supply, can the AD2 do more than 5V?
  13. Takeways: 1. Maximize the usage of the Xilinx Zynq 7000 resources 2. Understand the nuances and internal workings of the Xilinx Zynq 7000 3. Trade-off performance vs. energy consumption Complexity of systems implemented using FPGA's are exponentially growing in a rapid pace. As a result of it most of the common design issues that a designer come across with ASIC SoC are becoming relevant with FPGA as well. If we consider Xilinx Zynq 7000 Programmable SoC, there is considerable processing power on the compute side. A simple migration is insufficient to achieve the sam
  14. I am working on a solution to power the ZedBoard's BBRAM with a battery when the 12V supply is unavailable. Looking at page 28 of the HW UG, I only see VCCAUX which leads me to believe that the battery is powered by VCCAUX when the board is plugged in and switched on. On sheet 10 of the schematics I see VCCAUX and VCCBATT_0 both supplying powering the 1.8V rail. What I want to know is the following: If I connect a battery to BBRAM, will power be drawn from the battery at all times or only when the 12V supply is switched off? Please let me know if you need any more information to answer this qu
  15. Hello everyone, and thanks in advance for reading this! On a current project, I’m working with a network of Arduino UNOs R3, each with an AnalogShield installed (to be precise, it’s 4 Arduinos+AnalogShields total, communicating over I2C). I immediately found a problem when I connected all their Vin ports together to a 12V power supply: they sourced too much current (my main power supply was reading more than 1 A!). So I quickly stopped that and tried connecting the 5V ports together to a 5V power supply. At first this was OK, but soon they started to source too much current again.
  16. I have observed, what to me is, unexpected behavior in regards to the power consumption of the ZedBoard (Zynq-7000) when a processing core accesses the on board DDR memory in certain situations. I have performed a number of tests were I monitor the power consumption of either the A9 core with DDR or a softcore Microblaze with DDR. For both setups I have found cases where the power consumption of the board when actively running a program that frequently accesses DDR is lower than when the processor is sitting idle. This does not make sense to me as I would expect the power when active to be
  17. I am a recent fan of Digilent. As a student I would like and recommend to have a fine measurement device like Analog Discovery 2 in combination to any digital/analog development. It provides a great insight into the working of your device, doesn’t matter either it is FPGA, Microcontroller based design, or purely Analog. One important point I would like to raise is that I have right now downloaded the Waveforms software of Analog Discovery 2 in order to see in detail that what it offers. I found that in the section of power supply, there is no option available to get 3.3V out of Analog Dicove
  18. Bought a new laptop with Windows 10 downloading original Waveforms to use with Discovery 1. It failed to recognize the devise. I removed waveform program and deleted any files relating to it and downloaded the new Waveforms 2015. This opened up but I got a message indicating that there was not enough power provided to the Discovery 1 devise. I tried using all USB ports which include USB 2.0 and 3.0 but had no such luck. Is there a fix for this issue?
  19. Greetings, New user to the forum, hope I can contribute some in the not so distant future. I am here by the recommendation of Digilent technical support. I am the new owner of a suspected malfunctioning Dev board (Genesys / Xilinx ) . Perhaps someone out there has some on hands experience with this particular product? I am having difficulty getting a power good indication (LD8) when I apply the required 5V supply. For a short time I have been exploring the Adept interface in an attempt to communicate with the board and when using the Power meter I notice the various voltages along wit