samltd Posted July 8, 2006 Report Share Posted July 8, 2006 Hi everyoneDoes anybody know how to get this working:The circuitry is an RS232 Optical Isolation which connect on Serial COM port. How can I make an adapter to get this circuitry to work on USB?Thanks Quote Link to comment Share on other sites More sharing options...
MP Posted July 9, 2006 Report Share Posted July 9, 2006 There seems to be a misconception that serial to USB conversion is just an added circuit to the comm port. You need to completely change the signal and add drivers to the PC to make a virtual comm port for the new signal to run on.Here is a link that will help get you going. You will find the dedicated chip and the license free software that is needed.http://www.ftdichip.com/Products/FT232BM.htmMP Quote Link to comment Share on other sites More sharing options...
samltd Posted July 9, 2006 Author Report Share Posted July 9, 2006 Thanks, I tried to make this shematic from the datasheet of FT232.But it is possible to use a mobile phone data cable instead of FT232? It also creates a virtual com port, but has only 3.3V (most of them). the optocoupler needs 5V. How can I get the optocoupler work on a GSM data cable?Thanks Quote Link to comment Share on other sites More sharing options...
MP Posted July 9, 2006 Report Share Posted July 9, 2006 Your usb port is most likely part of the mobile phone circuitry. I doubt that the cable will be much more than two data lines and voltage + and -.Is there circuitry in your cable? Without a pinout of the cable or more information on the phone, I can only make a guess.MP Quote Link to comment Share on other sites More sharing options...
login
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.