R232 interface - Techwatch Support Forums: Digital & Satellite TV, FTA, Cable, Computers, Mobile Phones, Apple and General Tech Forums

stuuyh · 16-02-09, 10:29 PM

Helo all...just finished building my r232, i cant opst links or pics but i have used the following pins from the chip to the 4 pin connector..

pin 16 |---VCC
pin 15 |---GND
pin 12 |---RX
pin 11 |---TX

now my problem is i dont know where these relate to on the 250....anyone have a pic with the 4 pins labelled up on the modem end so i can make the lead up...thanks in advance..

ste0ey · 16-02-09, 11:06 PM

use the first 4 pins nearest the ethernet port
pin 16 |---VCC - pin 1
pin 15 |---GND - pin 2
pin 12 |---RX - pin 3
pin 11 |---TX - pin 4

stuuyh · 16-02-09, 11:16 PM

aahhh im confused now...jus found on another forum this

Starting nearest the ethernet port (the blue port at the rear of the modem.
GND
Tx
Vcc (3.3v)
Rx

anyone??

ste0ey · 16-02-09, 11:24 PM

to be honest the way i done mine was different from the one i read in the giude, and i have seen it done a couple of ways, just try them see one works in the end.

lee-ds · 16-02-09, 11:27 PM

Smurf · 17-02-09, 03:13 AM

Where u get the max232 chips from and how much are they. I want to build one what capacitors should be used?

lee-ds · 17-02-09, 09:39 AM

look here

Code:

http://sodoityourself.com/max232-serial-level-converter/

Bad_Ad84 · 17-02-09, 09:43 AM

https://shop.maxim-ic.com/storefront/searchsample.do

search for chip you want, max232 or max233 and request 10 free samples.

16-02-09, 10:29 PM	#1 (permalink)
stuuyh Junior Member Join Date: Feb 2009 Posts: 25 Thanks: 1 Thanked 0 Times in 0 Posts	R232 interface Helo all...just finished building my r232, i cant opst links or pics but i have used the following pins from the chip to the 4 pin connector.. pin 16 \|---VCC pin 15 \|---GND pin 12 \|---RX pin 11 \|---TX now my problem is i dont know where these relate to on the 250....anyone have a pic with the 4 pins labelled up on the modem end so i can make the lead up...thanks in advance..

16-02-09, 11:06 PM	#2 (permalink)
ste0ey Senior Member Join Date: Nov 2008 Posts: 141 Thanks: 12 Thanked 29 Times in 27 Posts	Re: R232 interface use the first 4 pins nearest the ethernet port pin 16 \|---VCC - pin 1 pin 15 \|---GND - pin 2 pin 12 \|---RX - pin 3 pin 11 \|---TX - pin 4

16-02-09, 11:16 PM	#3 (permalink)
stuuyh Junior Member Join Date: Feb 2009 Posts: 25 Thanks: 1 Thanked 0 Times in 0 Posts	Re: R232 interface aahhh im confused now...jus found on another forum this Starting nearest the ethernet port (the blue port at the rear of the modem. GND Tx Vcc (3.3v) Rx anyone??

16-02-09, 11:24 PM	#4 (permalink)
ste0ey Senior Member Join Date: Nov 2008 Posts: 141 Thanks: 12 Thanked 29 Times in 27 Posts	Re: R232 interface to be honest the way i done mine was different from the one i read in the giude, and i have seen it done a couple of ways, just try them see one works in the end.

16-02-09, 11:27 PM	#5 (permalink)
lee-ds Cable Animal Join Date: Dec 2008 Location: The Capital Of Yorkshire Posts: 1,673 Thanks: 163 Thanked 451 Times in 350 Posts	Re: R232 interface __________________ If at first you don't succeed.......flash and flash again!

17-02-09, 03:13 AM	#6 (permalink)
Smurf Senior Member Join Date: May 2008 Location: Midlands Posts: 1,220 Thanks: 131 Thanked 179 Times in 164 Posts	Re: R232 interface Where u get the max232 chips from and how much are they. I want to build one what capacitors should be used?

17-02-09, 09:39 AM	#7 (permalink)
lee-ds Cable Animal Join Date: Dec 2008 Location: The Capital Of Yorkshire Posts: 1,673 Thanks: 163 Thanked 451 Times in 350 Posts	Re: R232 interface look here Code: http://sodoityourself.com/max232-serial-level-converter/ __________________ If at first you don't succeed.......flash and flash again!

17-02-09, 09:43 AM	#8 (permalink)
Bad_Ad84 Technology Forums Join Date: Dec 2008 Location: sbhacker.net Posts: 974 Thanks: 2 Thanked 251 Times in 173 Posts	Re: R232 interface https://shop.maxim-ic.com/storefront/searchsample.do search for chip you want, max232 or max233 and request 10 free samples.

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