Searching \ for ' Simple RS232 hardware' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/io/serials.htm?key=rs232
Search entire site for: 'Simple RS232 hardware'.

No exact or substring matches. trying for part
PICList Thread
'[PICLIST] Simple RS232 hardware'
2001\09\08@055909 by Andy Shaw

flavicon
face
Hi Folks,
I'm sure this must have been covered before but a search of piclist.com
failed to find anything... Anyway what would you recommend as the
simplest/minimal hardware RS232 interface for use between a PIC and a modern
PC? This is *not* for a production product I would just like to be able to
include a very cheap interface on a home project for occasional
diagnostic/config use. Can I get away without using a MAX* converter? What
are the pros/cons? What would be your suggested circuit?

Thanks

Andy

--
http://www.piclist.com hint: To leave the PICList
spam_OUTpiclist-unsubscribe-requestTakeThisOuTspammitvma.mit.edu


2001\09\08@061552 by Kathy Quinlan

flavicon
face
First do not forget the tag although I am sure you got the automated message
like I do when I forget ;o)

Ok forget any idea of not using a max* or equivalent. they save time and
money, all the commercial designs I do use them, all my home designs use
them. I could just make a 10 pin header and plug a max* converter board on
them to save money, but what the heck, it works this way, no power down just
to get the rs 232 comms working :o)

Regards,

Kat.

____________________________________________________________________________
The information contained in this email and any files transmitted with it
are confidential and intended solely for the use of the individual or entity
to whom they are addressed. If you have received this email in error please
promptly notify the sender by reply email and then delete the email and
destroy any printed copy. If you have received this email in error, you must
not disclose or use this information in any way.
____________________________________________________________________________


{Original Message removed}

2001\09\08@074442 by Andy N1YEW

picon face
As to my previous post the diode is a 1N4148(1N914 or something like) and the
resistors are both the same value(I used 10K).

ciao
andy

--
http://www.piclist.com hint: To leave the PICList
.....piclist-unsubscribe-requestKILLspamspam@spam@mitvma.mit.edu


2001\09\08@152248 by Byron A Jeff

face picon face
On Sat, Sep 08, 2001 at 10:57:21AM +0100, Andy Shaw wrote:
> Hi Folks,
> I'm sure this must have been covered before but a search of piclist.com
> failed to find anything... Anyway what would you recommend as the
> simplest/minimal hardware RS232 interface for use between a PIC and a modern
> PC? This is *not* for a production product I would just like to be able to
> include a very cheap interface on a home project for occasional
> diagnostic/config use. Can I get away without using a MAX* converter? What
> are the pros/cons? What would be your suggested circuit?

The pros of the MAX232 is simple: It works with the EIA-232 standard voltages,
it only requires 5V power, and it's easy to hook up.

It's really not worth discussing with discretes because if you're using the
standard UART you'll have to invert the signals anyway...

BAJ

--
http://www.piclist.com hint: To leave the PICList
piclist-unsubscribe-requestspamKILLspammitvma.mit.edu


2001\09\08@170122 by Bob Barr

picon face
Byron A Jeff wrote:
>
>The pros of the MAX232 is simple: It works with the EIA-232 standard
>voltages,
>it only requires 5V power, and it's easy to hook up.
>
>It's really not worth discussing with discretes because if you're using the
>standard UART you'll have to invert the signals anyway...
>

If you happen to have + and - supplies in the range of 9 to 15 volts, an
alternative is the 75155 from TI. One transmitter, one receiver, 8 pin
package. Pretty slick chip, don't know about pricing or availability.

Regards, Bob


_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp

--
http://www.piclist.com hint: To leave the PICList
.....piclist-unsubscribe-requestKILLspamspam.....mitvma.mit.edu


2001\09\09@020519 by Al Williams

flavicon
face
> all the commercial designs I do use them, all my home designs use
> them. I could just make a 10 pin header and plug a max* converter board on
> them to save money, but what the heck, it works this way, no power down
just
> to get the rs 232 comms working :o)

Have a look at http://www.al-williams.com/awce/rs1.htm for just that board
(well, 6 pins, not 10). Plugs into a breadboard nicely.

Regards,

Al Williams
AWC

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\09\09@083421 by Kathy Quinlan

flavicon
face
Hey Al,

Very nice little module indeed, if they did a uart (or bit bang / spi /
parallel / memory mapped ...) to  USB I would be in heaven. Love the net
port board, if I had a credit card I would buy one... HMMMM might get a
customer to buy one for a project I am working on for them :o)

The only reason I said 10 was I prefer double row headers for stability esp
when the header is the mechanical mount point, and AFAIK 6 is not a
standard, but 10 is :o)

Regards,

Kat.

____________________________________________________________________________
The information contained in this email and any files transmitted with it
are confidential and intended solely for the use of the individual or entity
to whom they are addressed. If you have received this email in error please
promptly notify the sender by reply email and then delete the email and
destroy any printed copy. If you have received this email in error, you must
not disclose or use this information in any way.
____________________________________________________________________________


{Original Message removed}

2001\09\09@190349 by Amaury Jacquot

flavicon
face
On Sat, 2001-09-08 at 21:21, Byron A Jeff wrote:
> On Sat, Sep 08, 2001 at 10:57:21AM +0100, Andy Shaw wrote:

[SNIP]

> The pros of the MAX232 is simple: It works with the EIA-232 standard voltages,
> it only requires 5V power, and it's easy to hook up.
>
> It's really not worth discussing with discretes because if you're using the
> standard UART you'll have to invert the signals anyway...

I personally prefer to use a MAX 233, which does not need any external
capacitors when the device needs to be small.

Sincerely
Amaury


>
> BAJ
>
> --
> http://www.piclist.com hint: To leave the PICList
> EraseMEpiclist-unsubscribe-requestspam_OUTspamTakeThisOuTmitvma.mit.edu
>

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


More... (looser matching)
- Last day of these posts
- In 2001 , 2002 only
- Today
- New search...