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Found 13 results

  1. What is the max input voltage that the Openscope mz can tolerate on the logic analyzer pins. What about the GPIO pins? In the documentation I noted the Oscilloscope has +/-20V measurement range and +/-40V tolerated range (in some forum). But for the logic analyzer I see only a specific mention of 3.3V. I want to be sure before I connect the logic analyzer to either 5V (some Arduino's) devices or 12V devices (e.g. old DSC832 home security board). Reviewing the PIC32 datasheet, and assuming I am correctly interpreting the Openscope reference manual, I can guess that the DIO[0-9] pins are 5V tolerant. Am I correct? Also, to ensure that the scope is protected I would need to not only have a voltage divider in place, but also a zener diode to ensure the voltages remain within range... what do you suggest/recommend?
  2. Hi, I am new to the Pmod USBUART. I read the reference manual but not sure if the Pmod USBUART can support 5V UART signals. Does any one know? Thank you.
  3. Could someone please tell me whether it is normal for a 4.5Vpp signal to show on the AD2 scope (with daughter board and real probe) as a 4.0Vpp signal when at 2V/div? If not, any advice for troubleshooting? Additional information: The ground clip is grounded properly. It doesn't change the signal when I connect the ground wire to my circuit ground as well. 20Vpp shows as 17.5Vpp at 5V/div.
  4. Power Control

    Data logging

    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 where 60% there
  5. Hi I'm trying to transmit digital signals through a cable. In orther to avoid noise, I am using a differential output (LVDS) to transmit the information from the FPGA to a Cable. At the end of the cable, I'm using a converter to convert the differential signal to a single-end signal (LVDS to Single End converter). For that I need to feed my converter circuit through pin 6 of pmod connector (pin6 = vcc pin = 3.3V). Initially everything was working properly. However the other day, I switched on the board again (Atlys Board) and checked that I no longer have vcc on pin 6 (pin6 = vcc pin = 0V). Can anyone explain what's going on? Is the board damaged?
  6. Hello! Recently I bought a PMOD AD5 board to hook it up with my Arduino DUE in order to measure AC Voltage. In terms of libraries, I tried two - the official AD7193 library and the AD Converter one, from GitHub. The AD Converter one seems like it's based on the official DSP library from your wiki, but adapted to Arduino. With that one, I had a few problems, so I went with the other one. For starters, I have my signal connected to AIN3 and GND connected to AIN4 (both on J2). The SPI is properly connected to my DUE, settings are SPI_MODE3 and SPI_CLOCK_DIV32 (initially it was DIV16, but I decided to try 32 as well, unfortunately to no avail). I am powering up everything from the 3.3V pin on the DUE and my signal is 50 Hz sine wave, with a 1.65V reference. I am measuring it with normal differential type, not the pseudo type (even though I tried that). Originally, with the default library, I could measure the 1.65V, but the sine wave isn't there (because of the 50Hz/60Hz rejection filter). Trying out different things with the mode and configuration registers from the AD7193 datasheet, I tried to set it up the following way: Chop Disabled, SYNC4 (and SYNC3 afterwards), FS=1; which from the datasheet it said that the 50Hz and 60Hz rejection would be disabled. I tried a whole lot of things, but I just couldn't get the filter turned off. Reason I am writing this is that I am hoping someone here can help me with my dilema and give me the means of measuring AC Voltage, because the ADC is great. Here are my register values: Mode - 0x080001 Configuration - 0x000208 I got these register values from the AD719X AFM Simulation Software. Running this configuration there, with 5MHz of the SCLK generates the Frequency diagram exactly as I need it. But for some reason, with the Arduino library, that just doesn't want to work. Thank you a lot for reading and I'm hoping someone can help.
  7. Hi all, I struggled for a while with unexpected DC outcomes from the datalogger. After research I found a DC temperatuur drift error. I think this affects the oscilloscope and voltmeter tool as well. If you watch the attached picture you see a 2 hour record of a 3,3V DC channel (1) and a zero volt (shorted) channel (2). You see a temperature / voltage drift in the range from -38,75 mV by 22 °C to + 2,4 mV by 43,75 °C. The only point where this drift is zero is after 1 hour. For me this DC drift makes the mV range useless and even in the Volt range i have to wait an hour before i have more or less reliable results. The fact that the Range setting in the settings pull down menu is by default on maximum and does not get saved with the workspace, gives always the maximum error for any certain point in time, I made this record with the 10V range in the settings pull down, if it was on the default maximum it was much worse, both channels are in the 100 mV range. Calibrating the device after one hour makes no difference in the temperature dependency. Perhaps this is only the case with my device but that's why we have a forum isn't it? Now my question, where am I wrong? Thanks in advance, Hans.
  8. I know that the scope functionality supports two 12bit channels @2 MHz (6.25 MSample/sec) bandwidth, but couldn't find any reference of what's the max input voltage. Nevertheless, great project and I'm happy to back it.
  9. Greetings, I am having some trouble with measuring 3 phase (U, V , W) line to line voltage with the Analog Discovery 1. Before this I used an oscilloscope and just connected the probe to my inverter's U & V, V & W and U & W output. But as i changed to analog discovery, the line to line voltages were too high and the AD automatically stops and an error message appears. So I tried using a voltage divider. But at a 1:20 ratio of Vout vs Vin, my AD still stops midway and still shows an error. If anyone would be so kind to help me I would be very grateful. I am still just a student, I would not mind you pointing out if I did anything wrong but I am not familiar with all the technical terms.
  10. sajis997

    voltage issue US and Rest of the world

    Hello forum, Are all the products that are found in your store deal with the voltage differences around the world or you are only concentrating to the USA consumers ? I am currently residing inside the Sweden and the voltage frequencies for the outlet is 230 V. I am very keen to go through the works you have outlined in your website and I would like to check some of the practical issues beforehand. Thanks
  11. Dual1ty

    Conflicting Voltages in Bank

    I followed the tutorial on Youtube shown below to 9:33 but my Bitstream generation is unsuccessful. I get the following rule violation: [DRC 23-20] Rule violation (BIVC-1) Bank IO standard Vcc - Conflicting Vcc voltages in bank 14. For example, the following two ports in this bank have conflicting VCCOs: btnD (LVCMOS18, requiring VCCO=1.800) and led[0] (LVCMOS33, requiring VCCO=3.300) Does anybody what I can do to fix it? Thank you very much! Tony
  12. The PS2 Keyboard/Mouse PMOD Connector has incorrect silk screen. The labels for VE and Gnd are backwards. VE is really GND, and GND is really VE. This is the +5V external input to power mice that run off of 5V (which almost all PS/2 mice actually do run off of 5V). Swapping VE and Gnd caused me to burn my mouse. It drew about a half-amp of current and immediately smelled that lovely smell of burning electrical components. I had to purchase a second PS/2 mouse once I found out the problem. If I connect the external power opposite of the silkscreen I am able to communicate with the mouse. Can Digilent do something to make this up to me?
  13. Hi, When I set the jumper on JP9 to 5V0, I get around 3.8V between pins pin 5 and ground instead of 5V. Is this normal or there is something wrong with my board. Regards,