Sir:
I have a problem in the connection of external sensors like temperature and
pulse oximeter to the expansion port of the telosB. what are the ways to do it?
do I need to design data acquisition board for the external sensor before
connecting it into the ADC port located in the expa
: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Richard
Sent: Wednesday, April 30, 2008 2:21 AM
To: tinyos-help@millennium.berkeley.edu
Subject: [Tinyos-help] addition of sensors to expansion port of telosb
Sir:
I have a problem in the connection of external sensors like temperature
and
If it has a DB9 connector it may be a serial interface.
Are you sure that it's analog?
MS
Richard wrote:
> Sir:
>
>
> I have a problem in the connection of external sensors like temperature
> and pulse oximeter to the expansion port of the telosB. what are the
> ways to do it? do I need to d
That is only the connector of the pulse oximeter probe
sir. I think there must be a DAQ to get the reading on
the probe then we must convert it to 0-3V analog
output so that we could connect it to the telosB
expansion port (ADC port). Am I right sir? Any
suggestions? Thank you.
--- Michael Schipp
Sir,
I think we must create a board like the smiths-medical
have the is compatible also for telosB. It can detect
and output the pulse rate and the oxygen saturation.
Also we could add the temperature sensor in there to
have temperature reading to be send to the ADC port of
telosB. But the problem
Well, I would start by looking at the specs for my sensor
to see what kind of signal it puts out. If it's an analog
voltage and it's in the 0-3v range you can just connect
it to an ADC input and start programming. Otherwise you
may need a resistor ladder to reduce the voltage or an op
amp to amplif
Do you have a link to the sensor data sheet?
You probably should look at the data sheet for the MSP430.
I'm overdriving the inputs on a telosb, of course they clip but it doesn't
seem to have any significant effect.
If you need to drop the voltage to 3 volts, it should be fairly easy
if the sensor
Sir,
Why is it that the range of my input into the telos ADC port must be ranging
from 0-3V? why 3V? is it because the battery supply is 3V? Thank you.
Richard
Michael Schippling <[EMAIL PROTECTED]> wrote: Well, I would start by looking at
the specs for my sensor
to see what kind of signal
Yup. Anything over 3 volts is wasted, and may overload the input pin.
Although as others have pointed out it's generally ok to over-voltage
even though the specs say not to.
MS
Richard wrote:
> Sir,
>
>
> Why is it that the range of my input into the telos ADC port must be
> ranging from 0-3V?
Thank you sir.
Richard
Michael Schippling <[EMAIL PROTECTED]> wrote: Yup. Anything over 3 volts is
wasted, and may overload the input pin.
Although as others have pointed out it's generally ok to over-voltage
even though the specs say not to.
MS
Richard wrote:
> Sir,
>
>
> Why is it that the
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