I need some guidance on the codes on how to :
1) convert voltage level into graphical display,and
2) Voltage indication with moving needle .
[ Info : I've already input the codes to display the voltage in numeric, but not in graphical display ] =)
Basically, my circuit board is connected to a solar cell and also a power supply(those laboratory DC power supply used in schools) and its connected to the computer via a RS232 Serial cable port. Thru the serial cable port, a voltage level is sensed and is displayed on the "Voltage Level in Volts(V)" -- See attach imageAs for now, i am also needed to display the voltage level into another type form intead of just Dial Voltmeter. Maybe to display the voltage level to a waveform like what we see on the oscilloscope ? I came across a suggestion from someone regarding the oscilloscope, but its in C# instead, and after converting, the codes does not work. Hmm.. ?
>> Therefore, i hope to get some guidance on how to display the voltage level into a waveform as what we see on the oscilloscope.
my circuit board is connected to a power supply(those laboratory DC power supply used in schools) and the circuit is connected to the computer via a RS232 Serial cable port.Through the serial cable port, a voltage level is sensed and is displayed on the "Voltage Level in Volts(V)" i am able to display a Dial Voltmeter with a needle. -- Coding for the dial voltmeter with needle is also attached for reference, just in case if it is needed.But currently, the dial voltmeter's needle does not point according to what is shown on the textbox. Therefore, i need guidance on how to allow the dial voltmeter's needle to point according to what is shown on the textbox. [code]
View 13 RepliesBasically, my circuit board is connected to a power supply(those laboratory DC power supply used in schools) and the circuit is connected to the computer via a RS232 Serial cable port. Thru the serial cable port, a voltage level is sensed and is displayed on the "Voltage Level in Volts(V)" -- See attach image
>> But currently, the dial voltmeter's needle does not point according to what is shown on the textbox.
>> Therefore, i need guidance on how to allow the dial voltmeter's needle to point according to what is shown on the textbox.
[[ Dial Voltmeter with needle ]]
Code:Private Sub PictureBox1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PictureBox1.Paint
[CODE]...
i want to increase the voltage level of the electricity?
View 8 RepliesAs mention in another thread ( if you have came across it --> Getting voltage from RS232 & allow dial voltmeter to point according to voltage level ), my circuit board is connected to solar cell and also a power supply(those laboratory DC power supply used in schools) and its connected to the computer via a RS232 Serial cable port. Thru the serial cable port, a voltage level is sensed and is displayed on the "Voltage Level in Volts(V)" -- See attach imageAs for now, i am also needed to display the voltage level into another type form intead of just Dial Voltmeter.Maybe to display the voltage level to a waveform like what we see on the oscilloscope ? I came across a suggestion from someone regarding the oscilloscope, but its in C# instead, and after converting, the codes does not work.
View 8 Replies1)Send a request to an external hardware by SerialPort1.write.
2)Receive this information in SerialPort1_DataReceived.
3)Set this information (integer from 0 to 31) on UserInterface (like cell phone signal level....)
How to pass level information to this graphical subroutine without receive cross - thread error?
========================
Serial request
========================
Private Sub Timer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer_Livello_Segnale.Tick
SerialPort1.Write("AT+CSQ" & vbCrLf)
[code]....
I have this light sensor circuit that will return positive voltage or negative voltage. I want to plug it into the 9-pin D-Sub port on my computer. I already have a male connector. How do I connect the circuit to the D-Sub connector, and how do I read the value and convert it to a Boolean in a program? How do I set up the cables? It only returns one 1 or 0 value. Is it possible, even?
View 17 RepliesDoes anybody know where to find a component for Visual Basic 2005 or 2008 that allow me to create level indicator, button, display or other special box used on a bridge of a ship? I want to simulate a small bridge of a ship and I need something that allow me to show engine power, rotation speed, level of pressure, compass and so on.
View 1 RepliesI am creating an Excel add-in written in VB.NET. I would like to bind KeyDown and KeyUp events to the spreadsheet to record when the user presses and releases the arrow keys while navigating the spreadsheetIdeally, these events would be built into Excel alongside the native SheetActivate and SheetSelectionChange events, for example. Alas, they are not.
View 1 RepliesIn Visual Basic 2008, there's two different ways that I know of to accomplish the same thing:The Dim on the member level:
Dim counter1 as integer = 0
Dim counter2 as integer = 180
Public Sub SampleSub1()
[code].....
I am working on a project where I have a signature displayed on the screen that is drawn via code based on data that has been transmitted from another device. This is from one of the samples from MS. The signature displays on screen just fine but I need to convert this to a bmp or jpg so I can save it to disk and/or print it on a report.
Code:
PrivateSub DrawSignature(ByVal g As Graphics)
' background
g.Clear(Color.Cornsilk)
' border
g.DrawRectangle(Pens.Gray, 0, 0, pictSignature.Width - 1, pictSignature.Height - 1)
' return if don't have a signature
[Code] .....
I have tried creating a new bitmap from the image property of pictSignature but it is empty even though it has an image displayed on screen. This is the first time I have tried to work with this type of coding and am totally at a loss as to what I need to do to get a bitmap from the data.
So basically, I have this RSS feed in hand. I converted the RSS into XmlDocument by the following:
Public Function GroveHallFromRss() As String
Dim webClient As System.Net.WebClient = New System.Net.WebClient()
Dim ourUrl As String = "http://abc.123.org/RSSSyndicator.aspx?type=N&
[Code]....
So I'm wondering how could I display the converted RSS as any other XML file with the nodes styled. (but not rendered and displayed by browser as RSS, but only styled XML)
I was wondering if will it be possible to do the following :1) When a specific voltage is sense and is displayed on the textbox, is there any codes to allow the audio announcement of the voltage ?(a) As voltage levels will usually be in decimal, like for example, (1.23 V) it may be difficult to allow the audio announcement of exact voltages
View 12 Repliesget sample code by using NI-6009 to measure voltage(Vrms) and Curent (Irms) . Before this i'm trying to make code with using example in National Instrument VB2010.But i still can't display the right values of voltage(Vrms) and Current (Irms) from waveform that I used.The data comes from data acquisition grid in source array i used to plot sinus waveform.But the problem is I don't know how to measure voltage(Vrms) and Curent (Irms) from that waveform. I am also don't know how to start programming between NI-6009 DAQ Card and Visual Basic 2010 Express.
View 1 RepliesI need some guidance again =)Its regarding the conversion of voltage level to equivalent LUX.As mentioned in prev. few threads, if you have seen it, basically, my circuit board is connected to a solar panel and is connected to a power supply (those laboratory DC power supply used in schools).The whole thing is connected to the computer via a RS232 Serial cable port. Thru the serial cable port, a voltage level is sensed from the Solar Panel and is displayed on the "Voltage Level in Volts(V)" See attach image
Currently, i need guidance on how to convert the Voltage Level into equivalent LUX.I googled and found from this website >> [URL]../324003.page and it states that Lux = 1333 * Vo , so does it mean that i just type:TextBoxLux.text = TextBoxVoltage.Text * 1333 I'm not sure if this is the correct method to convert voltage level from the solar panel into equivalent LUX. If this method is wrong, please correct me.
[Defination of LUX: The lux (symbol: lx) is the SI unit of illuminance and luminous emittance. It is used in photometry as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface]
I'm making a hangman game right now, and the way it works is: It takes ten words from a text file and puts them in an array.It's supposed to take one of those words randomly and change all the letters to asterisks and display it in a text box for the user to start playing.I'm currently having trouble with converting the whole word into the right amount of asterisks to display.As you can see, I've already started trying something with a for next loop to go through the word and replace each letter with asterisks.But I'm not sure of the exact 'wording' of it.
View 1 RepliesI am writing a VB.Net program. In my Main form, I ask the user if he has an old file that he wants me to convert first. If he says "yes", I start converting the file, loading the records into an Access database. I want to update a line on the form, showing my progress. But the form doesn't display until AFTER the entire file is converted (and loaded into the database). That means the user has to look at a form for 2-3 minutes without knowing if the program is actually processing, or is hanging up (looping).
I don't understand what is going on, and so I don't know what to do about it. I'm sure SOMEONE with experience has come across this situation before.
I have created a simple program which uses a two tier structure of SQL Tables.At the top level, one record holds the date of the activities and linked to it using its primary key as a foreign key, three subordinate tables hold time stamped records.The issue I have been unable to solve is that before adding any of the lower level records for a given date, a newly added top level record must be saved to the database.Doing this manually is simple - but can I rely on my users to remember to do this before they start plugging in the lower level data?I thought not, so I am looking to save the top level automatically.I've failed miserably but I refuse to believe that it's not possible.
View 14 RepliesI have been trying to come up with a code to send voltage signals to a serial port using Visual Studio 2010, I found many codes online but since i am not familiar with visual basic, I do not understand any of them.
View 8 RepliesI'm trying to develop a module that calculates voltages in a circuit based on setting for certain components. Is a module available to handle circuit calculations including parallel paths.
View 1 RepliesI am totally new to the graphical representation of the data. I want to make a progress report of students, based on marks achieved each year.For example, in year 2005 marks were 750. in 2006 780 in 2007 800
View 15 Replieswant to make my program look nicer , but i dont exactly know how should i make it's visual for example making a menu or else
View 2 RepliesI have multiple level of For Each and in each level, i have a Linq that is the 'In' criteria as in:
[Code]....
It will go inside each for (because the value is not nothing), however, it will only loop (next) in the very inner 'For Each t In tFor'. After it is finish inner loops, the outer Fors' or Next will not execute... even thought there are more than one values in that 'In'... like 'sFor' or 'fFor'. i've noticed while debuging, while break at the for (for example 'sFor', before stepping in), i get the error message:
"Enumeration yielded no results" when i expand the result for that variable and it will not step into it. but if i do not expand the result, it will step in. It seem that some how, once an element is accessed for that 'In' collection, it breaks (meaning does not loop for the rest of the elements) the next for that collection is this a bug or am i missing something in Linq? BTW: i believe it has something to do with the SqlDataReader in the Linq. I'm working with IAsyncResult.
I'm wondering how I could monitor a serial port for a voltage change or contact closure and have an event triggered when there is a detection.
View 1 RepliesI have a file from the client which is a text file. I have to decode the file to a graphical representation. Is there any way I can do it?
View 16 RepliesI want program to do Graphical Representation of array Sorting in vb.net with bars/shapes.
View 1 RepliesWhat is the best way to write a GUI for C++?
View 1 Repliesi want the user interface to be kinda similar to the jQuery UI. This means themed buttons and windows(preferabely the ones form jQuery UI) Also, i'm looking for nice sliding and morphing windows.
View 3 RepliesHow do I access SqlCommand object graphically. I couldn't find SqlCommand tool in the ToolBox under Data group to drag it into my form
View 2 Replies