How To Control Power To A USB Port
Jul 12, 2009I have a simple USB fan that just runs on the power from the USB port. I want to be able to turn of and on the fan from a simple application.
View 1 RepliesI have a simple USB fan that just runs on the power from the USB port. I want to be able to turn of and on the fan from a simple application.
View 1 RepliesHow do I use DeviceIoControl Win32 API and the IOCTL in VB oder C#/C+/C++ to power down a USB port?
View 1 RepliesIm coding an application that needs to list all computers inside my LAN, and get the status of the machines ex. Power On, Power Off.. in order to Wake On Lan, or Turn it Off.. im using Visual Basic .Net.I all ready listed all machines, now i need to get the status of them..
View 5 RepliesDo someone know if there is a\\ USB control for the USB port communication? like the SerialPort control for the COM port.
View 2 RepliesI'm trying to make a USB strobe light type thing. I have a cut USB cord with an led attached to the black and red wires. Now I'm trying to write a script to make the light flash on and off really fast. I've tried several different apis but none are doing it.
View 2 RepliesI am looking to create a VB 2008 Express programme which converts a data stream from a picoscope muscle sensor into a power output board which controls a mechanism.In simple terms when the Muscle sensor reaches a value of 0.8 V or higher I want the programme to send a text file to the power output control programme, and likewise when the sensor is below 0.2 V I want the power to be zero.
So 0.8 V > = send text file (0O=100%)
0.2 V < = send text file (0O=0%)
so when muscles being senced move the device turns on and off.I think I am successfully getting the data stream from the Picoscope which is plugged in the usb. I am using codes and examples that the programming guide for the device provided.here is a quick snap shot of the code (ps2000 is the driver used for the device)
ps2000_open_unit()
ps2000_set_channel(ps2000_handle, 0, 0, 0, 1)
ps2000_run_streaming(ps2000_handle, 250, 1000, 0)[code].....
how to get the data to be displayed or how to tell the programme to do something with the data.The device also came with an example of how it can record data to an excel sheet if anyone needs the code to gain a better understanding.
I'm writing some VB2008 code to control four 7-seg LEDs I bought from Velleman. They came with some example code in VB 5.0, and with instructions telling me to input 5 bytes at a time in the format Chr$() & Chr$() & etc. for the rest of the 5 bytes. When I try to do this using VB2008, it rejects the $ sign, so I've tried it using the Chr() format, which VB2008 allows. However, it doesn't work. Is Chr() the new version of Chr$() or are they different entities? In sending data to the LEDs, I'm using LiveComPort.WriteLine() as my command. (My serial port is called LiveComPort) I also tried it with LiveComPort.Write() asthe command. I know that my serial port and the LEDs are working, because they respond to the demo program provided by Velleman.
View 7 RepliesHow to control LCD 2X16 or 4X20 by the LPT port?
I have these two LCDs, I wired them and connected them to the LPT port and used free programs from the net. they work fine. I would like to learn how to do that in VB.NET. Maby program a form to show time and date and display the contenant of TextBox.
i trying to make a control for serial port to send a string "1" to serial port , but i don't want to use a form. I want to be able to save as .ost file or be able to input it into outlook 2003 macro to use as a script. can someone get me started on how to name, open, set, write to a serial port without using a form? just to use as a macro?
View 2 Repliesim new around here and also to VB.NET infact any aspect of programming, im hoping to be able to some useful stuff but at the momment im a little stuck i only have basic knoweldge so anyway here goes im programming in VB.NET 2008 Express edition, im also using inpout32.dll which is running ok and also controlling the parallel port fine.the problem i have is as follows the program so far is controlling the 8 outputs at the momment, i can turn each individual one on but when i try to turn multiple outputs on it will only turn on one and the other that was turned on goes off i understand its controlled in a 255 bit array but how to decode it is a little tough
View 5 Repliesi want to control pc parallel port using vb.net/vb6 , i need timer coding .
View 1 Repliescurrently doing a college project called Home Appliances System by using Voice Command.I have done the voice command part and now it comes to the interfacing between PC and relay board part. Currently I'm considering using USB port to send data(to trigger the home application). Does anyone know how to do it with VB.net?
View 9 RepliesAll these days i used to program in Vb6.0. Now since from last 15 days I have been using Vb2008. In Vb6.0 I used MSCOMM for serial communications. Here in Vb2008 I found Serial port control equivalent to it. I somehow managed to learn how to send data using serial port control and set parameters like baudrate , stopbits , etc. But I' not getting how to get the received data. In VB 6.0 we used to use comEvReceive in OnComm event and used MSCOM1.Input to get the received data. But I'm not getting how to do the same in vb2008.
View 2 RepliesI have written a programm with visual basic 2008 express edition and I'd like to use the parallel port to communicate with my self-made circuit. I want to controll 120 LEDs with the parallel port but I don't get it how. I know how to activate the databus but not how to activate the control lines of the parallel port.
View 3 RepliesI just need to write data to serial port to control a toy car
Moving left, right, forward, back.
Can someone tell me if the functionallity to control a parallel port in MS VB 2010 Expess exists? I was expecting to have to add a reference such as the microsoft comm control 6.0. However this reference does not appear in the list. Everything I search for references .net 2005/2008.
View 4 RepliesI am trying to send a control string from VB.NET to a serial port. I am using a pololu trex jr. on the receiving end of the serial port. I have attached a copy of my current code which compiles without errors, but fails to send data. I can tell that it is not sending data because I have a light on the control board connected to the port and it normally blinks when data is received. The program that came with the board drives it perfectly but does not serve the purpose I need it to. I am open to any suggestions as I eventually plan to write a class to contain the control routines.
View 12 RepliesI have created a laser that can be controlled via the serial port. I've written the code to switch it on/off and it works fine. How do i make it strobe? Here's the code to switch it on, to switch it off is similar (don't ask why it is like this...i think it's the transistor from the circuit board that switches the signal):
[Code]...
In my windows application I am using Mscomm32.ocx control for serial communication.
I set the control properties like below in the Form1_Load event.
AxMSComm1.CommPort = 1
AxMSComm1.Settings = "9600,N,8,1"
AxMSComm1.InputLen = 0
[Code]....
I'm working on a project where I need to trigger an event when a switch is closed. It is my understanding that it is possible to use the control lines on a serial port and read whether the switch is closed or not. I've found a schematic of how to connect the switches to the pins, but I have not been able to find any example code on how you can read the state of the switches.
View 2 RepliesI am getting scale values from a comm port into a richtextbox control, now as long as the connections and the scale is working great scale readings continuously flow into the control all the time, however when the connections or the scale is turned of the label that displays the weight will give a message saying error.
After 5 seconds I want to be able to give the operator the choice to take scale readings manually. This is my code so far.
Private Sub tmScaleTimer_Tick(sender As System.Object, e As System.EventArgs) Handles tmScaleTimer.Tick
If rtbDisplay.Text.Length = i Then
[Code].....
how do I restart the timer if the interval has elapsed
In my application I am using MSComm32.ocx control for the purpose of serial port communication.
when i am using it I am getting a following error while writing data to the port.
"AxMSComm1.Output {"Exception from HRESULT: 0x800A018A (CTL_E_GETNOTSUPPORTED)"} Object "
I am writing the output to the port like below. AxMSComm1.Output ="Hello"
I mention the properties of the ocx control in the form load like below. AxMSComm1.CommPort = 1
AxMSComm1.Settings ="9600,N,8,1"
AxMSComm1.InputLen = 0
AxMSComm1.PortOpen =True
I searched for this error in the net.But I am not found any information for this issue.
can anybody explain why I am getting that error and how to resolve it???
here is my code
Public
Class
Form1
[code].....
I'm mohammed from Oman ,I'm visual studio.net programmer How I can Read the Data From Barcode Weight scales By Serial port and TcpIp port
View 7 RepliesI have a Windows form.in windows form have a combo box that give me a list of available port serial with it code (Dim ports As String() =SerialPort.GetPortNames())for example( Com1,Com8,Com15,...).but I want to give me fullname of serial port in device manager for example in dvice manager is these (Comunication Port(COM1) - Printer Port(LPT1) And USB Serial Port(COM8)).how to Get it?
View 2 RepliesI would like to detect the Address and Port number of the Parallel Port in computer.
View 4 RepliesIf I uninstall the COM1 and reboot, it works. If I shut down (power off) and restart, I get the message below. If I uninstall then click on Scan for Hardware Changes,The given port name does not start with COM/com or does not resolve to a valid serial port. Parameter name:portName
View 8 Repliesi got a program i ran that says unable to install bla bla microsoft.visualbasic.powerpacks.vs version 9.0.0.0 be installed in the global assembly cache (GAC)first
View 2 Repliescomponent id for Visual Basic Power Pack 3.0.I need to determine if or not it is installed on my system for my setup.
View 3 RepliesI am looking to record information about the computers power consumption over time, is there any way I could do this using vb, I can get the current voltage from the processor but do not know the current therefore can not work out the wattage. I know of application which do have power consumption recorders but I would like to create my own.
View 1 Replies