please help me,

i want design 1 electronic interface by USB, but i don't know how to start? please if someone were known about it, please help me.

 

Read "USB Complete" by Jan Axelson.

Robert Scott
Real-Time Specialties

 

If you want to connect to a PLC using USB, the Fatek FBs PLC has a USB port as its primary programming port. This PLC has up to 5 communications ports (RS232,RS485,Ethernet,USB) and can talk Modbus RTU (Master/Slave) and Modbus TCP/IP Slave.

 

If you want to control a process with USB, check out http://www.labjack.com they have a USB device (U12) that has 8 analog inputs, 2 analog outputs and 20 digitals that can be configured as inputs or outputs. They also have some accesories for temperature, etc. The device is $119, and includes drivers, sample software, excel addin and VB code...

John

 

first, i thank you very much.
but, i can't buy it, because i don't have money.

 

Visit
http://www.usb.org
http://www.beyondlogic.org/usbnutshell/usb1.htm

The site below is by Jan Alexon, author of "USB Complete"
http://www.lvr.com/usb.htm

Hope you will find it useful...