I agree that it is best to keep the level converter separate and use it only
when needed. There are many TTL level "RS232" applications. E.g. stuff
connected to a BASIC Stamp, or another microcontroller. Why add the circuit
(and it's noise, power draw, etc...) when you don't always need it?

Just keep a TTL<>RS232 level converter handy for when it is required. Like,
Oh, I don't know THIS ONE:
http://www.piclist.com/io/serial/rcl1


---
James.


-----Original Message-----
From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On
Behalf Of Shawn Tan Ser Ngiap
Sent: 2004 Apr 15, Thu 10:58
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:]TTL to/ From rs232 for 16F628 circuit

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On Friday 16 April 2004 13:05, Mark Mynsted wrote:
> I am new to this and want to be able to connect my circuit to my pc to
> provide nice informaiton for debugging etc.  The 16F628 has a AUSART
> but I need to alter the voltage.
> I found the following here at piclist:
> http://www.piclist.com/techref/io/serial/ttl-rs232.htm

- -- >8 --

Why go through all the trouble and all the unknowns.. just pop in a MAX232
or similar chip, a couple of caps.. and you're off.. in fact, if you're
doing this regularly, you might even consider making a RS232 to TTL level
converter using a MAX232.. Just my 2 cents...

- --
========================= engineering elegance ========================
AESTE WORKS (M) SDN BHD
url:    www.aeste.net
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