Voltage to frequency converter

In my project I need voltage to frequency converter, can you plz tell me if any IC is available in Multisim 12?

You might get better replies if you posted in the Circuit Design Board. That is specifically for Multisim questions.
Lynn

Similar Messages

I am trying to configure my SCXI-1540 card for excitation voltage and frequency using MAX - but it is not giving me that option when I click on the card and then properties, am I looking in the wrong place?

I am trying to configure my SCXI-1540 w/1315 card for excitation voltage and frequency using MAX - but it is not giving me that option when I click on the card and then properties, am I looking in the wrong place?
I have LabVIEW Express 7.0 Professional - SCXI-1000 Chassiss - along with SCXI-1112, and SCXI 1520/1314 - cable to the PCI-6052E is attached to the 1520 card.
MAX says it recognizes all the cards in the chassiss.

Jeremy, Thanks for the reply.
I tried to set up the system as DAQmx.
I had MAX auto-detect the set-up - and it recognized all the cards - but did not select the 1315 accessory on the 1540 card - I had to do that manually - but in the configuration section I would select the accessory and it would deselect itself. I had to get out of the set-up and then right click on the 1540 card and click on the "Accessories" tab and select the 1315 terminal block that way.
It didn't seem right that the system should behave that way, but I pressed onward.
I then tried to create a new DAQmx Task
When I create new DAQmx task and then click on Analog Input no "Position" Tab appears for me to select, all I get are:
Analog>>Voltage
Analog>>Temperature
Ana
log>>Strain
Analog>>Current
Analog>>Resistance
Analog>>Frequency
Analog>>Custom Voltage with Excitation
Do you think there might be something wrong with either my hardware or perhaps my configuration that is not allowing it to recognize the 1540/1315 in DAQmx?
I had included the system report of what programs I am using, etc. as attached file nireport.txt
After the DAQmx did not work I tried installing everything as Traditional DAQ and it did let me set-up the 1540 Card with Excitation Voltage and Frequency and gain - I then went in to the VI that I had built and tried to use the Express DAQ Assisant to read the channel that I am connected to on the 1315/1540 - when I try to use DAQ Assistant it gives me an error saying that "Device not available in NI-DAQmx. It is possible that the device is being use by traditional NI-DAQ"
Which I guess it is since both configurations are now set-up in MAX.
I would PREFER to use the DAQmx set-up, but I am confused as to WHY it won
't come up with
Analog input>>POSITION>>LVDT
When I try to create a new DAQmx task.
Thanks for the help so far! As you can probably tell I am new at this.
Ryan
Attachments:
nireport.txt ‏2 KB

Voltage and Frequency

Hello everyone,
I intend to use my T400 laptop mostly in Germany where I will be studying for the next couple of years. However, I realized that there is a difference in the type of plugs, voltage and frequency used between the two countries. Is the A/C adapter that came with the laptop do the job. May you kindly advise me how to overcome this problem.
Your quick reply is highly appreciated.
Regards,
Georges

Georges, welcome to the forum,
your location shows as Germany, you don't metion which country the other one of the two countries is.
That said, all ThinkPad AC Adapters are rated with input 100V-240V. This means you can use your own adapter, all you will need is the power cable or a travel adapter for the plug.
Hope this helps.
Andy ______________________________________
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Voltage and Frequency concerns

Hi,
I am planning to buy a Mac Mini in the US. According to specs,
US Mac Mini:
# Line voltage: 100-240V AC
# Frequency: 50Hz to 60Hz, single phase
# Maximum continuous power: 110W
The voltage and frequency in my country is 220-240 volt, at 50 hertz frequency. So, if I were to buy a Mac Mini in the US, and bring it back with me to Asia, will it sill work in my country?
Thank You.

vslum78-
Greetings and welcome to the Apple boards.
You will be fine. Take a look at this discussion thread on the same topic. Some good additional information there.
Luck-
-DaddyPaycheck

Can my macbook pro use 220 voltage without a converter when I travel in Europe

Does anyone know if my Macbook Pro function without a converter when I travel to Europe (220v). Can I use it with just an adapter plug? I also have an older Ibook which I prefer to take when traveling for data security and portability reasons. I can't find info on whether I need a converter or just an adapter plug fo r this either! Am I just not finding this info in/on the computer itself? (very possible, given my Luddite tendencies) Thanks folks

The Apple power supplies are dual voltage (and dual frequency), so all you need is a plug adaptor.

"raw voltage" y "frequency binds"

Tengo un manual que baje de la pagina de National Instruments llamado "LabVIEW Measurements Manual" (de la Edición de Abril de 2003, Part Number 322661B-01 y nombre de archivo: 322661b.pdf) donde hay un par de parrafos que lei y no entendi muy bien al traducirlo. Se trata de las palabras:
- Raw Voltage
- Frequency Binds
La palabra "Raw Voltage" la encontre en la pagina 57 de 159 (pag. 6-2 del manual): "The AI Sample Channel VI acquires a single value, in this case, raw voltage. The scaling value of 20 mph/volt wired to the Multiply function scales the input voltage range of 0 V to 10 V to the wind speed range of 0 mph to 200 mph."
La palabra "Frequency Binds" la encontre en la pagina 90 de 159 (pag. 13-1 del manual): "The number of points you collect determines the number of frequency bins that the data falls into. The size of each bin is the sampling rate divided by te number of points you collect. For example, if you sample at 500 S/s and collect 100 points, you have bins at 5 Hz intervals."
Ojala me puedan ayudar con la traduccion porque segun lo que busque "raw voltage" es como voltaje sin depurar o crudo y "frequency binds", es algo como compartimientos de frecuencia.
Gracias

Jpatagonia buen día,
Gracias por usar los Foros de National Instruments, estuve checando el manual y cuando se refiere a Raw Voltage es debido principalmente a que cuando hace una adquisición de dato lo hace de manera “cruda” o lo que es lo mismo sin ningún tipo de acondicionamiento de señal o procesamiento digital de la señal, sino, la simple adquisición de lo que estas tratando de medir.
Cuando hablamos de frequency bin nos referimos a que cuando haces un muestreo y tenemos la transformada de Fourier los puntos que se generan de esa señal se les llama bin, es decir, cos(w/n) es el primer bin, cos(w2/n) el segundo bin y demás. Podríamos decir como si fuera, el dato de la primera muestra en la frecuencia wa/n, donde a es el bin, el número del bin.
Lo que dice el texto es que el tamaño del bin es una división, por lo que tenemos un bin cada 5 Hz, es decir, como un dato cada 5 Hz
Espero que esta información te ayude y cualquier cosa estamos para servirte.
NorSa
AE LATAM
National Instruments
NorSa
NI Applications Engineer Latin America
Para Soporte entra aquí

Digital frequency converter

Hi,
I have an rotation table which is equipped with an encoder. The encoder is sending about 737 pulses each time the rotation table does one complete turn. If the rotation frequency is, let say, 10 turns/second the encoder will by sending pulses at a frequency of 7370Hz. I need a way to convert this pulse train by another pulse train at lower frequency. For the example at hand here I would like to divide the pulse train frequency by a factor of 7.37.
Also, the rotation frequency may change in realtime but the conversion factor (7.37) will remain the same.
Is there an easy way to do this? I currently have a PCI-6601board, how could I use it for this application?
Thanks

I don't know a simple way to do exactly what you describe with hardware. Here are a couple things you *can* do using 1 or 2 counters (most multifunction boards have 2). Not exactly what you're after, but maybe one or the other will work good enough?
1. You can use 1 counter to divide down a TTL signal by any integer >= 4. You would define your pulse train using units of "Ticks" and then specify the integer #'s of ticks for high time and low time. (The minimum allowed value of ticks is 2.) You would also have to specify the external encoder signal as the counter's "timebase source" signal.
2. You can achieve nearly any fractional division factor by using 2 counters. One will measure the incoming encoder freq, the other will generate an output that is some arbitrary fraction of the other. However, the output won't change instantaneously with the input, nor can it be expected to track every nuance of the input variation. You have to perform software calls to sample, then calculate, and finally update the output freq. Note that the output pulse train can have its freq changed on-the-fly without stopping.
Another tip for option #2: measure your input frequency with continuous sampling. Then you can setup DAQmx Read properties to request that you read the most recent N samples. That way each time you request data, the call will return immediately with the freshest available data. You can then do any needed filtering or averaging on these samples to determine the most representative input freq.
Don't have time to explain all details of terminology above. Search the forums and you'll probably find quite a bit of help. You can include my signature ("Kevin P") in the search because I've been involved in past threads using many of these terms such as "timebase source", "units of Ticks", "on the fly", "most recent samples".
-Kevin P.

Very Low Frequency Converter

Hello
There are numerous devices that transmit audio via very low frequency (VLF). I quote:
"Carrier current devices are a combination of technologies. They are a cross between
wired microphones and subcarrier transmitters. The only difference is that the signal
is not transmitted via radio waves, but rather through a wire pair. A person cannot
accidentally intercept or detect a carrier current signal by simply tapping into a wire
like with wired microphones. A carrier current device works by picking up room audio
through a microphone. The signal from the microphone is then modulated by a low
frequency circuit, which produces a carrier current signal at approximately 100–200
kHz. A common example of carrier current devices are the newer wireless telephones,
intercoms, or baby monitor type devices that plug into the electric socket and use the
pre-existing wiring rather than having wiring run all over the house. A special circuit,
which can demodulate the low frequency signal, is used as the receiver.
Only a sophisticated receiver with a low frequency probe can detect this sort of device."
Can Audition modulate the signal back into an audible range?

At 100kHz, yes it's true - you'd need an audio interface running faster than twice the modulating frequency to demodulate all of the sidebands correctly. Not it's not absolutely impossible to do this, but it's a very expensive way of doing what hardware does very cheaply! To do this in Audition, you'd need initially to get the modulated carrier in (so if it was 100kHz, that would require an interface that runs at 200kHz to satisfy the Nyquist requirement) and all of the currently available crop appear to stop at 192k), and then run the signal through an envelope detector to capture the sideband signals. Problem is that Audition doesn't have the envelope detector, so you're stuffed anyway, even if you used 100Hz. 100Hz would give you all sorts of problems on top of this, because you'd have to use FM and then you'd have to deal with all of the reflected sidebands.
So to state this baldly, Audition is an audio editing program, not a radio receiver!
If you want to read more about this (and I should warn you that this gets complicated) then here are a few links:
Demodulation - Wikipedia, the free encyclopedia
audio-rate frequency modulation
http://www.secretmango.com/jimb/Whitepapers/radio/radio.html

I have an ipod touch 5.1, live in the us and travelling to South Africa. Do I need a voltage converter?

I have an ipod touch. I live in the us and am travelling to South Africa. Do I need a voltage converter?

Many wall charger are universal voltage (110 to 220 VAC) and frequency (50 or 69 Hz). However, you may need a plug adopter to mate with the receptacles in the country.
The charger will have written on it the voltage and frequency.

Display voltage/frequency of a input device beginner question

Hope I'm posting this question to the correct forum. I am creating a small application, that will send a input voltage/frequency of 30Hz. So what my java program should do is to identify the voltage/frequency that was input to my computer and display it.
I am new to this, and i hope i made my question clear here. Basically what i need is to display the inputed voltage/frequency.
I have no clue of how to start. Can some one show me an example code, so i could study it and understand how it hapence.
Edited by: localpott on May 28, 2010 9:12 PM

localpott wrote:
I am new to this, and i hope i made my question clear here. Basically what i need is to display the inputed voltage/frequency.
I have no clue of how to start. Can some one show me an example code...Start with [the tutorials|http://java.sun.com/docs/books/tutorial/]. Chances are, any code we suggest at this stage would be pointless, and wouldn't help you to learn.
One question though: How were you planning on passing in the voltages and frequencies?
Winston

Can I plug my iPad into an outlet in France for recharging, or do I need a converter (besides de adapter...)?

Can I plug my iPad into an outlet in France for recharging, or do I need a converter fo the voltage?

No converter needed, just an adaptor

Will I need a converter/adapter for my Macbook Pro in Japan?

I'm currently set to study abroad in Japan, and I have a few questions about what converters/adapters I'll need. Regrettably, I need to admit I'm not very tech-savvy, making this issue a bit more complicated for me.
Electricity in Japan runs at 100 volts and 50 hertz, and most (if not all) outlets only accept 2-prong plugs, according to the predeparture information I was provided with.
I should note that I lost the "plug" attachment of my Macbook's charger, meaning I have to rely exclusively on the 3-prong extension cord to plug my Macbook in. Needless to say, I should definitely get an adatper to be able to plug the 3-prong charger into Japan's 2-prong outlets.
When it comes to voltage and frequency, though, I'm essentially clueless. What converters and/or adaptors will I need to use my Macbook Pro in Japan? Are there any converters/adapters available that can address both my 3-prong plug and volts/hertz issues in a single product, or will I have to buy a separate product for each of these needs?
Thanks in advance.

You can purchase a wall outlet plug adaptor by purchasing any international travel kit such as Apple's or from AAA. No other device is needed. The power unit for your computer is auto-detecting/switching.

How can I find the frequency of a signal from a turbine flowmeter?

My turbine flow meters output a voltage signal frequency. Is there are way that I can find the frequency in LabVIEW? Right now I have the flow meters wired to my card as analog inputs. Maybe I need to wire them in differently.

Dear moebeth,
To address your question, can you include more information about the flow meters? As far as I know, turbine flow meters can have outputs of analog voltage, analog current, frequency/pulse, or switch.
If the meters are outputting a voltage, then connect it as an analog voltage input and use the analog voltage virtual channel.
If the meters are outputting a frequency or pulse, connect it as a counter input. With the counter input, you would need to program in LabVIEW without using a virtual channel. Instead, you would use the counter VIs. There are shipping examples included with LabVIEW. Measure Frequency (DAQ-STC).vi can be used just by pressing Run if you wire the signal into the source of whichever counter you want to use and th
e ground into DGND.
Let me know if you have any further questions or if this does not resolve your issue.
Thanks again and have a great day!
Chad AE
Applications Engineer - National Instruments
Attachments:
Frequency.zip ‏45 KB

High Bandwidth Voltage Input Isolation

Hello,
I'm using the NI 6025E DAQ board and connect it through the SC2050 conditioning board to an analog I/O board, 5B01. I would like to isolate between the board and an analog signal coming out of of a DUT unit, and I need the isolation unit to be able to handle signals of Mghzs bandwidths.
I realize that I cannot find a 5Bxx unit with such high BW, but what do you recommend I should do instead ?
Michael.

Hello Michael,
I see that you are looking for an isolation module to connect to your 6025E device that has a bandwidth in the MHz range. Unfortunately, I think this type of setup will not work for you since the 6025E has a maximum sampling rate of 200kHz. If you need to be able to sample data in the MHz range you will need to have a device that can sample much faster (i.e. High Speed S-Series or NI-Scope products).
Typically you do not see much signal conditioning for these types of devices since they have such a high bandwidth. For example if you look at our SXCI isolated analog input modules they have a bandwidth of just over 20kHz.
I hope this helps. If you have any additional questions can you please give us a little more information about the signal coming from your DUT (i.e. voltage and frequency range and what type of isolation you are looking for)?
Regards,
Jesse O.
Applications Engineering
NIC
Message Edited by Jesse O on 10-17-2006 10:44 AM
Jesse O. | National Instruments R&D

Apple tv 2 power - voltage

the apple tv 2 description says universal adapter while not indicating if it takes both 110V and 220V as well as a frequency of either 50 or 60 Hz. Can someone please confirm if it will work with any voltage and frequency? Please confirm. Thanks.

Welcome to the Apple Community.
Any voltage, any frequency, it works anywhere.

Voltage to frequency converter

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