usb to serial convertor

• Dec 6, 2006

• #1

J

jayavardhan

Full Member level 2

Joined

Sep 1, 2006

Messages

124

Helped

3

Reputation

6

Reaction score

0

Trophy points

1,296

Location

India

Activity points

1,840

how to connect ft2232d to the computer

hi all,

i want to build a usb to serial convertor in low cost what components do i need to choose. Please any body help me.

 

• Dec 6, 2006

• #2

pisoiu

Advanced Member level 3

Joined

Dec 31, 2002

Messages

750

Helped

43

Reputation

86

Reaction score

21

Trophy points

1,298

Location

Romania

Activity points

7,883

cp2102 or ftdi 232bm max232

FT232BM, look for it at www.ftdichip.com . There are many discussion on this forum about it, use the search function.

/pisoiu

 

• Dec 6, 2006

• #3

blueroomelectronics

Advanced Member level 5

Joined

Sep 17, 2006

Messages

1,681

Helped

180

Reputation

358

Reaction score

77

Trophy points

1,328

Location

Toronto, Canada

Activity points

8,696

cp2101 + max232

They are so cheap to buy. $13 from Tiger. You can't build them for that and why would you want to.

 

• Dec 6, 2006

• #4

G

Giuss

Member level 1

Joined

Oct 16, 2006

Messages

38

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,286

Activity points

1,446

serial converter ttl 3.3v toronto

You can use the new FT232R, it works very good

 

• Dec 7, 2006

• #5

P

phruchya_2498

Newbie level 4

Joined

Dec 1, 2006

Messages

6

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Activity points

1,311

cp2102 usb rapidshare

let me find the smatic first as sonn as posible i not make sure i have or not

 

• Dec 7, 2006

• #6

N

narbeh_rob

Junior Member level 1

Joined

Jun 16, 2006

Messages

15

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,281

Location

Tehran

Activity points

1,408

check this file

 

• Dec 7, 2006

• #7

S

shetoos_asu_65

Junior Member level 1

Joined

Oct 3, 2005

Messages

19

Helped

2

Reputation

4

Reaction score

0

Trophy points

1,281

Activity points

1,417

hii
here is a circuit diagram... but to be honest i get it from a topic somwhere on this site...but i decided to help..
thanx

 

Attachments

• 
  usb-rs232-converter_2921.gif

  21.5 KB · Views: 780

• Dec 8, 2006

• #8

T

txdx2005

Member level 1

Joined

Jul 15, 2006

Messages

37

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,286

Activity points

1,610

you can use cp2103 or use mcu simulate usb

 

• Dec 8, 2006

• #9

S

siongboon

Advanced Member level 1

Joined

Jan 24, 2006

Messages

423

Helped

45

Reputation

88

Reaction score

10

Trophy points

1,298

Location

Singapore

Activity points

4,075

Use FT232.
Quite easy to implement.

**broken link removed**

 

• Dec 8, 2006

• #10

O

omidgold

Member level 2

Joined

Jun 5, 2006

Messages

48

Helped

4

Reputation

8

Reaction score

1

Trophy points

1,288

Activity points

1,521

of cource i think it is possible with some microcontroller they are very chip

 

• Dec 15, 2006

• #11

G

Giuss

Member level 1

Joined

Oct 16, 2006

Messages

38

Helped

0

Reputation

0

Reaction score

0

Trophy points

1,286

Activity points

1,446

If you use the FT232R you don't need the eeprom, the crystal and some other components

 

• Dec 18, 2006

• #12

narccizzo

Full Member level 3

Joined

Jan 20, 2006

Messages

173

Helped

16

Reputation

32

Reaction score

11

Trophy points

1,298

Location

PATZCUARO,MICHOACAN,MEXICO

Activity points

2,819

This one is pretty good CP2101 from Sillicon Labs, you onli need to feed it.
Regards.

Added after 2 minutes:

Even better, just connec it!

 

• Dec 19, 2006

• #13

J

jayavardhan

Full Member level 2

Joined

Sep 1, 2006

Messages

124

Helped

3

Reputation

6

Reaction score

0

Trophy points

1,296

Location

India

Activity points

1,840

i'm having a laptop usb port and a kit which is having serial port. for the kit the powersupply is provided from a adaptor.


for serial communication i need this usb to serial convertor.

for this purpose which one will suite?

plz give me suggestions on this.

thanks in advance.

 

• Dec 19, 2006

• #14

narccizzo

Full Member level 3

Joined

Jan 20, 2006

Messages

173

Helped

16

Reputation

32

Reaction score

11

Trophy points

1,298

Location

PATZCUARO,MICHOACAN,MEXICO

Activity points

2,819

You can use any of the above, you only need to know if the kit is TTL or (RS-232 if the kit is designed to connect it directly to the serial port of the PC) you will need a transceiver (the yellow square in the CP2101 diagram) like the well known MAX232. and the full circuit (CP2101 and MAX232) can be feeded with the USB port.
You should take a look wich pins are used by your kit, almost all times only are needed the 2, 3 and 5 (rx, tx and gnd) and for this case most USB-SERIAL converters works fine, but it is difficult to say wich converter will work with you specific kit, maybe you can tell us what kit are you trying to connect and perhaps somebody already did it.

Regards

 

• Dec 19, 2006

• #15

A

are

Advanced Member level 4

Joined

Nov 16, 2004

Messages

109

Helped

17

Reputation

34

Reaction score

11

Trophy points

1,298

Location

Balen (Belgie)

Activity points

644

for a PIC usb-rs232
look at

http://www.epemag.wimborne.co.uk/projects2005.html

**broken link removed**

 

• Dec 20, 2006

• #16

J

jayavardhan

Full Member level 2

Joined

Sep 1, 2006

Messages

124

Helped

3

Reputation

6

Reaction score

0

Trophy points

1,296

Location

India

Activity points

1,840

the kit is my personal kit and i'm using R8C/11 microcontroller in it and max 232 and the db9 is given to 2,3, and 5 pins.

 

• Dec 20, 2006

• #17

E

ericmar

Full Member level 5

Joined

Apr 14, 2004

Messages

278

Helped

3

Reputation

6

Reaction score

4

Trophy points

1,298

Location

Singapore

Activity points

2,928

I tried both FT232BM (for my thesis project) and the CP2102 (for company project).

I would recommend the CP2102 as it is really easy to implement as u dont need to add other components.

 

• Dec 20, 2006

• #18

X

xwcwc1234

Full Member level 5

Joined

Jul 21, 2001

Messages

284

Helped

7

Reputation

14

Reaction score

1

Trophy points

1,298

Activity points

1,753

Hwo to use CP2102 ? Should I program it ?

 

• Dec 20, 2006

• #19

narccizzo

Full Member level 3

Joined

Jan 20, 2006

Messages

173

Helped

16

Reputation

32

Reaction score

11

Trophy points

1,298

Location

PATZCUARO,MICHOACAN,MEXICO

Activity points

2,819

[/quote]Hwo to use CP2102 ? Should I program it ?

Just connect it, it does not need program.

Click to expand...

 

• Dec 21, 2006

• #20

E

ericmar

Full Member level 5

Joined

Apr 14, 2004

Messages

278

Helped

3

Reputation

6

Reaction score

4

Trophy points

1,298

Location

Singapore

Activity points

2,928

xwcwc1234 said:

Hwo to use CP2102 ? Should I program it ?

Click to expand...

No need programming. Just follow the connection of its datasheet. There is an example circuit. Also, it is possible to request for unique PID (Product ID) from Silabs for making ur device unique. U will only need to program the CP2102 for changing the default PID to a unique PID using their software if needed. And this can only be done after u hv successfully made the circuit. Upon successfully implemented, u will need to install 2 drivers in the computer when u plug in. One driver is for virtual COM port, another is for USB device driver.

There r some application notes in their website which u can refer to!

Hope this helps!


Regards,
Eric Mar