FTDI DB9-USB-D5-F connection to Basic Stamp

dchapma1

Hi All,

New here but have been using stamps for several years. I came across this FTDI part: DB9-USB-D5-F which is a self contained USB to Serial converted housed in a standard DB-9 connector that mounts right on a PCB.

I just tried this on a known working project of mine. I loaded the USB virtual port driver from the FTDI website and when I plug this into the laptop I get nothing.

Has anyone used this part on a basic stamp project? Any insight on circuit changes that may be required?

Thanks much,
Don

bsnut

Welcome to the forums Don.

I loaded the USB virtual port driver from the FTDI website and when I plug this into the laptop I get nothing

Are you trying to program the Basic Stamp with the USB to Serial? I have been programming the Basic Stamps 1 and 2 with USB to Serial for years without any problems.

dchapma1

Yes - but I cannot even see the Stamp when I run "Identify" and Windows does not identify a new USB device when I connect the module via a USB cable. If I use the Parallax # 28030 USB to Serial mini PCB it works fine.

What I have is a custom circuit board with the BS2-PX stamp on it. The board design was originally laid out with the same RS-232 connections as depicted in the schematic for the board of education. Basically just 3 caps connected out to a DB9. This works fine using a Serial cable. I wanted to change the design to USB as many laptops are now coming with no serial port and my guys in the Field would be better served with a USB. So I stumbled upon these FTDI Modules.

I am using the Female 5Volt version, part number DB9-USB-D5-F soldered right to the PCB in place of the old Serial DB-9. But It does not see nor communicate with the laptop or Stamp.

Thanks
Don

davejames

Hello Don,

These look like a neat product...and one I could use on the BS2 OEM board.

Should you find a resolve, please post it?

Franklin

Sounds like your drivers are not installing correctly. If the drivers were correct plugging ith usb cable into your adapter should find a device even if the adapter was not connected to anything. Try removing all usb drivers and downloading a fresh set.