vb based relay control using usb port....

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jit_singh_tara

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Dear friends ,
I am new to pc side programming , I need to design something like this:

An application in vb which uses usb port of pc ,to connect to a hardware consisting of pic microcontroller (with usb support) to control 4 relays .

Please suggest me how to begin , what all i need to do on both:

1.PC side vb application
2.Microcontroller side usb interface, if i plan to use a usb controller of pic , then do i need to implement usb framework on it using microchip library.

Please sugggest..
thanks and regards.....
 


Instead of USB. use the RS232 interface. So, you can connect it using a USB-RS232 converter to Laptop or directly to PC via RS232 cable. Because of RS232 interface it is very easy to design the PC side application in VB
 
I did something similar to this a long time ago. I created a module "porting.vb"

Code: 
Module porting
    Public Declare Sub Out Lib "inpout32.dll" _
       Alias "Out32" (ByVal PortAddress As Integer, ByVal Value As Integer)
End Module

Then you can just make simple calls to it:
Code: 
 porting.Out(888, 0)

This was for serial though, but it might help.
 

Hi,

Here is simple VB NET software for control USB Relay incl. source code

**broken link removed**

**broken link removed**

Source code:
**broken link removed**
 

libusb is good and works very well...

also u can use FT232 (usb to rs232 converter) if u wanna design it easily!
 

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