Using BJT as a switch of negative voltage

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• Digital FPGA of entry of the negative voltage

  What is the maximum negative tension that the digital input on the FPGA can take without damaging it? I tried to look in the data sheet for the sRio 9636 and I can't.

  Thank you

  Hi, Berthe.

  The sbRIO-9636 was DIO only on the OID (J502) and connectors MIO (J503). It's a bit different from the other variants sbRIO-96xx that others may have a RMC connector that has additional DIO.

  Connectors IDC 50 pin DIO and MIO are 3.3V pins, but they are 5V tolerant inputs we have protection on the IDC DIO connector. VIL values and HIV are specified in the data sheet:

  

  http://www.NI.com/PDF/manuals/373378d.PDF

  These are the recommended conditions of use. If you need to know the maximum negative voltage to determine if your landing short of the runway is acceptable, this number to an absolute minimum is - 500 mV. I would recommend you choose the appropriate to your driver series termination resistors to minimize landing short of the runway, however. The absolute minimum even applies to the 3.3V RMC DIO as well.

• Hi people. Intend to purchase Apple Watch USA and use it in Europe. Will this be a problem? Can I use only a simple switch of 3rd party? I'm going to hurt same hardware or software?

  Intend to purchase Apple Watch USA and use it in Europe. Will this be a problem? Can I use only a simple switch of 3rd party? I'm going to hurt same hardware or software?

  Hello

  You will be able to use the watch in Europe.

  There is no regional differences in the hardware and the software can be configured to your chosen region. The supplied USB power adapter will have to pine trees located in the United States. A travel adapter will allow you to connect it to the European outlets.

  Alternatively, you can buy an Apple USB power adapter that is located in your country of destination / country.

  For example:

  • 2-pole:
    • http://www.Apple.com/FR/shop/product/MD813ZM/A/Adaptateur-secteur-USB-5-w-Apple? FNODE = 83
  • UK 3-pin:
    • http://www.Apple.com/uk/shop/product/MGRL2B/A/Apple-5W-USB-power-adapter-folding - pins? FNODE = 83

• Use the keyboard to switch to the next tab

  I use ctrl + tab to switch to the next tab.
  But this feature does not work since the first tab, only for all other tabs.

  I have the Menu bar on.
  I use alt + f to open the file menu, and so on for all the menus
  Even this command only works for all tabs except the first.

  I tried the shortcuts that you have provided on my Firefox. They seem to work fine.

  This problem could be due to an extension you installed on Firefox. To see if this is indeed the issue, please try Firefox in Safe Mode.

• How can I close the Client Services for Netware that is me project to use the fast user switching without losing my internet connection

  For NetWeare customer service

  How can I close the Client Services for Netware that is me project to use the fast user switching without losing my internet connection

  Hello

  Your Windows XP question is more complex than what is generally answered in the Microsoft Answers forums. It is better suited for the IT Pro TechNet public. Please post your question in Forum.You IT Pro can follow the link for your question:

  http://social.technet.Microsoft.com/forums/en/category/w7itpro

• What equipment I need another for the purposes of the on/off switch, adapt output voltage/current using labview program

  This is my first time to use labview, I want to use the program to control the DC power for the start/stop it or set the output to program automatically.

  Now I had the (supply) instrument, got a computer with labview. I know that I have to buy a GPIB cable, making a connection between the instrument and the computer. But I do not know what to buy? Cable GPIB or GPIB controller. Confused.

  Thank you

  A GPIB cable, by itself, will do nothing. You need a GPIB controller connected to your pc. With the NI USB-GPIB-HS controller, you can connect directly to a single instrument and no need for a separate cable. If you go with an internal controller to a pc (i.e. PCIe), you need a cable to connect the controller to the instrument.

  You can also check if the power supply has other options such as Ethernet or USB remote control.

• Can I use horizontal scroll to switch between tabs?

  I find it useful to switch between tabs with the side-scrolling my mouse wheel. Can I configure Firefox in this way?

  Apparently FireGestures doesn't support scrolling directly if you can't make it work. I have no local way to test it, because nobody doesn't know I have a mouse with a horizontal scrolling. FireGestures provides alternatives (I use the tab scrolling of line), however, and supports scripts , if you want to try to use the technical information provided by cor - el.

  One avenue would be to use the mouse like Logitech Setpoint or Microsoft Intellipoint software to set the scrolling to run the FF Ctrl + PgUp and Ctrl + PgDown hotkey combo. This would negate native scroll, however.

  You can leave your comments at https://input.mozilla.org/en-GB/feedback/ if you do not want to see this feature implemented. I think you're better of trying to get an add-on to do this though, as horizontal scrolling appears to remain a characteristic very niche.

• Can we average channel error using multiple channels to measure the same voltage?

  I don't know how correlated error terms are between measuring channels max, but it occurred to me that, if they were relatively independent, I might be able to sample the signal even with several channels and increase accuracy.

  For example, rather than measure a voltage with an AI only at 100 kHz, I could connect up to 10 different lines to HAVE the signal, sample to 10 kHz on each line.  This should allow to reach me on average some of the error associated with each channel (, or so I think).

  Can someone speak definitively to this?

  Thank you

  Sean

  Well, if you are using a MULTIPLEXED Board (everything is not specced for simultaneous sampling) then each channel is connected to the ADC even one after the other, best that you would be able to do is extremely, extremely small variations into the paths of each channel of the multiplexer.  This would still be massively overshadowed by the inherent noise from the system and the accuracy of the device.

  Your best bets to reduce the measurement error is to oversample in one way to reduce the effects of noise and to calibrate the unit before starting each test to keep variations of temperature.  In addition, make sure you keep your calibrated Board (most of the boards have a calibration 1 year of the cycle).

  For some applications, you should also consult wiring field and considerations of noise for analog signals, How to eliminate ghosting of my measurements? and Troubleshooting unexpected tensions, floating or crosstalk on Analog Input Channels to better account for ghosting and the issues of the hour.

• Problem using the Keithley 6487 pAmmeter with supply voltage.

  I try to use a Kiethley 6487 to bias a photon detector in my lab and I am new to LabVIEW. So far, I've been able to get current the ammeter readings, but I can't increase the supply voltage. The code I came up with so far is able to start communication over distance with the device but returns an error when you use the vi ramp. Here is the error I get:

  1074135024 error has occurred in KE6485 configure Source Ramp.vi

  Possible reasons:

  Driver status: (Hex 0xBFFA0010) invalid value for the parameter or property.

  I removed the piece of code related to the drafting of my main block diagram and changed my global variables to the constants. Any help on this would be highly appreciated.

  Thank you
  Cameron

  
  

• boolien use of case selection switches

  Hi all

  I want to use the switches of boolien for the selection of cases in triggered mode. I mean I have a 4 switches (like lock mode when you press the trigger) when I pressed and released the button a case corresponding to the switch to be executed, but the structure of the case is able to work only with simple switches and selectors ring (but not with combinations of different States). I tried with Combinatorial logic gates, but it increases the complexity nothing else.

  some body help me to do so.

  You can use the Boolean value like this

• How properly using USB 6251 to measure the DC voltage

  Hi all

  I have a problem as in the http://forums.ni.com/ni/board/message?board.id=170&message.id=404676&query.id=250408section.

  I'm sorry for the repetition of the subject, but I read all your advice and have not yet solved the problem.

  My task very simply: I use USB-6251, differential mode to measure battery voltage Energizer 1.5V. But result shows > 10V? Mean.VI shows greater 4V (see attached photo)

  I do not understand what happed with my task?

  Please help me!

  Thank you very much!

  MC

  Hello

  Please post on the Forums OR!

  How do you have your battery connected? Do you use polarization resistors? This could be a grounding problem and can be fixed if the polarization resistors are used. See table 1 in this document , and the differential configuration for a floating source.

• Cannot use the fast user switching.

  Me and my partner to use a laptop running Windows XP Home Edition. Up until recently, I was always able to use the fast changing users to switch between myself and my partner (the two administrator) accounts. Since installing AGV PC Tune up, WAS not worked and we both close completely to change username. This takes time and obviously becomes a pain in the rear. Anyone got any ideas?

  See if one of these items:

  "How to use the Windows XP Fast User Switching feature"
    <>http://support.Microsoft.com/kb/279765 >

  "A discussion about the availability of the fast user switching feature.
    <>http://support.Microsoft.com/kb/294739 >

  HTH,
  JW

• If you are using windows it suddenly switches to a blank white screen

  Original title: white screen Syndrome

  If you are using windows, that it suddenly switches to a blank white screen, I can't get except if I use ctrl alt delete very annoying is there a set problem here? help help help

  Hi Yaxleybandit,

  Until solve us the problem I need more information on the issue.

  ·        When exactly do you get the white screen of white?

  ·        This occurs when the computer is idle or while working on this subject?

  ·        It happens when you use a particular program or is it random?

  ·        Did you do with the last changes made to your computer before this problem started?

  Also, you can open check and Event Viewer if there is another error important messages/codes related to the question and after return of the error.

  See the link below for more details:

  What are the information contained in the logs of the event (Event Viewer)?

  http://Windows.Microsoft.com/en-us/Windows7/what-information-appears-in-event-logs-Event-Viewer

  Post back with the required information.

  Thank you and best regards,

   

  Srinivas R

  Microsoft technical support.

  Visit our Microsoft answers feedback Forum and let us know what you think.

• Venue Pro 8: use the charger with a little more voltage and current?

  I just bought a Dell came Pro 8 tablet used running Windows 8.1. The seller didn't have the original charger, so he gave me a 12W of Apple loader that had taken out nominal 5.2V and 2. 4A

  Is it okay to use this charger for my Tablet? Any potential problems in the long term?

  Thank you!

  I'm sure that the voltage is OK to 99.9%.  The extent of the current note goes, which is often misunderstood.  The rated current for a charger power or power is the maximum that the charger/power is able to provide. It could be evaluated to a zillion amps, but the equipment to which it will draw only what it requires.

• use robocopy with the switch /MIR safe?

  Hello

  I use Robocopy to copy my phone book c:\users\username on a second hard drive (D :). No problem. But I also want the mirror of this second hard drive on a third drive hard (e). I have been using the /MIR copy/mirror hard drive D: E: switch.
  We know that /MIR deletes several files from the disk of destination files (e: in this case) if they no longer exist on the source (d) drive.

  But I recently saw somewhere on the internet, there are certain risks that /MIR can also remove some of the source files in certain circumstances. Scary!
  Here is the exact quote (unfortunately I did not record the site it comes.)

  Use /MIR with caution - it has the ability to delete a file from the source and destination, under certain conditions.

  This happens usually if a file/folder in the destination has been removed, causing ROBOCOPY to mirror the source to the destination. As a result, the same files in the source folder are also deleted. To avoid this situation, never to delete all the files/folders on the destination - remove from the source and then run the backup to mirror the destination to the source.

  If in doubt, do not use the MIR, but be aware that backups will take more time.

  So I wonder if it's true and/or tailored to my needs.  The explanation above don't make much sense to me. For the moment, I have abandoned the /MIR switch and am just using the Robocopy command to copy the second HD in the third.

  Thanks much for the thoughts or advice or links.

  Jack

  The /MIR switch is NOT a two-way synchronization.  Right of the Microsoft documentation, it tells you/MIR/e + / purge.  It does not remove the source files.  The /MOV option removes the files from the source because you move them from the source to the destination.

  The /mir option is equivalent to /e plus/purge with a small difference options in behavior:

  • With the /e plus/purge option, if the destination directory already exists, the destination directory security settings are not replaced.
  • With the /mir option, if the destination directory already exists, the security settings for destination directory are replaced.