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Author Topic: USB to TTL and RS232 to TTL converter project  (Read 9906 times)
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Dillon
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« on: March 26, 2011, 06:58:09 18:58 »

Good Afternoon all:
  I am currently working on laying out project 8 & 9 from sparkfun with Eagle Cad.  This is from their training files section and is a good tutor on how Eagle works.  This project is for a USB to TTL converter using a $3 FTDI chip and will be used with windows programs to program Ham radio and Commercial transceivers.

I have also layed out an RS232 to TTL interface.  This interface will be used for DOS based programs that are required by some software packages. It also programs Ham radio and Commercial transceivers. 

I would be happy to make these available if they would be of use to others.  Please post here.


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DarkClover
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« Reply #1 on: April 13, 2011, 11:12:49 23:12 »

As far as I know there is a chip from FTDI which is a stand alone USB to TTL converter.
It's the FT245R. You can chose the IO-lines by pin either for 3,3V or 5V.

And RS232 to TTL can easily be done by MAX232.

There are a lot of designs out the there but if yours is something
special please feel free to post it Smiley
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puta
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« Reply #2 on: April 14, 2011, 11:08:51 11:08 »

For USB to TTL Converter Module using PL2303 STC:

Please look at:-    
***p://cgi.ebay.com/USB-TTL-Converter-Module-PL2303-STC-/150585010005?pt=LH_DefaultDomain_0&hash=item230f90e755
DO NOT CODE LINKS your link should look like this
http://cgi.ebay.com/USB-TTL-Converter-Module-PL2303-STC-/150585010005?pt=LH_DefaultDomain_0&hash=item230f90e755
« Last Edit: April 15, 2011, 11:09:26 23:09 by pickit2 » Logged
Dillon
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« Reply #3 on: April 15, 2011, 09:48:48 21:48 »

Well I was going to use the FT232R which gives TTL and RS232 outputs.  Also in response to Puta  I tend to not purchase something I can build myself.  Partly because I dont have a lot of money but mostly because I love to build projects... even to the point of designing and etching my own PCBoards.  So I just thought it was a natural to offer it to others. 

Like some here I dont have the resourses to post a lot of books and stuff so I try to add to the bottom line where I can. 

Dillon
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ZASto
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« Reply #4 on: April 18, 2011, 12:48:37 00:48 »

Quick mistreating on google gave this link: http://diy.elektroda.eu/konwerter-3w1-usb-do-rs232-rs485-uart/?lang=en

HTH
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nbb3i
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« Reply #5 on: April 18, 2011, 09:34:34 09:34 »

I've finished my project: USB - UART (TTL) with PL2303HX
Schematic, PCB layout and Driver can be downloaded with the link in description below video.
Watch and get it yourself. Good luck!
http://www.youtube.com/watch?v=ZUO4mkaiduM
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DarkClover
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« Reply #6 on: April 19, 2011, 01:06:02 01:06 »

I've finished my project: USB - UART (TTL) with PL2303HX
Schematic, PCB layout and Driver can be downloaded with the link in description below video.
Watch and get it yourself. Good luck!
http://www.youtube.com/watch?v=ZUO4mkaiduM
Wow your PCB looks great. Do you make the final PCB by yourself or by a company ?
What are the main advantages of the PL2303 compareds to the other standard chips?
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darck_khronos
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« Reply #7 on: April 19, 2011, 03:31:18 03:31 »

Hello, i use MCP2200 the Microchip 2.2 dls xD
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chinninitin
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« Reply #8 on: May 13, 2011, 06:07:46 18:07 »

CP2102 or 03 is good, and also full documentation with gerber available  on SiLiconLabs site

www.silabs.com
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Kombinator
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« Reply #9 on: May 14, 2011, 05:58:45 17:58 »

I never use PL2303 .... i have one and under SP3 stop work
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Prolific does not manufacture or sell any end-user products (particularly cables or enclosures) and does not provide support or email to end-users.
For end-users purchasing some no brand products that may only refer to our website for driver support, please note that Prolific does not manufacture these products.

« Last Edit: May 14, 2011, 06:09:42 18:09 by Kombinator » Logged
sadman
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« Reply #10 on: May 19, 2011, 09:01:00 09:01 »

I've finished my project: USB - UART (TTL) with PL2303HX
Schematic, PCB layout and Driver can be downloaded with the link in description below video.
Watch and get it yourself. Good luck!
http://www.youtube.com/watch?v=ZUO4mkaiduM

i don't have software in which schematic and PCB is made can you please share in PDF format

regards
sadman
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ALLPIC
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« Reply #11 on: May 20, 2011, 06:29:12 06:29 »

http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en546923
and
demo board
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1406&dDocName=en547372

I build this by my own and this work perfectly no issue
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BharatSujanani
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« Reply #12 on: May 20, 2011, 06:37:29 06:37 »

i don't have software in which schematic and PCB is made can you please share in PDF format

regards
sadman

Dear Sadman
I have used cp2102 and mcp2200 for usb to usart. I have attched both schenmtics in pdf format. And net names Rx and Tx are for the controller side Rx-Tx. If you have any query please feel free to ask.

regards
Bharat Sujanani
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chinninitin
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« Reply #13 on: May 28, 2011, 07:40:47 19:40 »

CP2102/3  Datasheet/Schematics/Gerber available at Silabs site

http://www.silabs.com/products/interface/usbtouart/Pages/usb-to-uart-bridge.aspx
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rajarduino
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« Reply #14 on: July 06, 2011, 01:27:17 13:27 »

Also, Eagle schematics and files for FT232-chip (which I typically use) for interfacing to microcontroller are available at the following links:
http://www.sparkfun.com/datasheets/DevTools/Arduino/FTDI%20Basic-v21-3.3V.pdf
http://www.sparkfun.com/datasheets/DevTools/Arduino/FTDI%20Basic-v21-3.3V.zip
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