Why not use MAX3232 or similar?
Regards,
André
----- Original Message -----
From: Eric Decker
To: Sean Dekker
Cc: tinyos-help@millennium.berkeley.edu
Sent: Thursday, December 06, 2012 7:11 PM
Subject: Re: [Tinyos-help] TelosB TTL voltage levels of UART0
you probably want to use conversion h/w that understands 3.3 V.
It is what I use.
On Thu, Dec 6, 2012 at 5:09 AM, Sean Dekker <sean.dek...@gmx.com> wrote:
Hi all,
I could succesfully write an app for using UART0. The app compiles and
uploads just fine. But I have a slight proplem or misunderstanding that hope
you can point me to the right direction:
I am running the TelosB on batteries. It provides around 2.8 ~ 2.9 volts. I
want to connect the UART0 (from 10 pin IDC header) to MAX232N and read/write to
a PC.
MAX232N Expects +5 volt in idle state, and I think anything over 3.7 volt
is counted as a high (or low) byte.
My question is, is this the default TTL levels of TelosB (or MSP430). Is
there any of the shelf component that can help reaching CMOS level using the
2.8 volt of batteries?
Regards,
Sean.
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--
Eric B. Decker
Senior (over 50 :-) Researcher
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