Re: [NTLK] temperature

From: Johannes Wolf (mp2100_at_mail-gw.estec.esa.int)
Date: Sun Aug 24 2003 - 23:32:27 PDT


There are A / F converters as well, but you are right, this seems too
complicated.

Johannes

> -----Original Message-----
> From: newtontalk-bounce_at_newtontalk.net
> [mailto:newtontalk-bounce_at_newtontalk.net]On Behalf Of Filip Zawadiak
> Sent: Friday, August 22, 2003 11:00 AM
> To: newtontalk_at_newtontalk.net
> Subject: Re: [NTLK] temperature

> Johannes Wolf wrote:

> >In principle I can see two ways:
> >1) there is an audio input on the Newton Interconnect Port. If
> you condition
> >the sensor (thermistor) signal such that you gat a voltage
> between 0 V and
> >2V max for the desired temperature range you could connect that
> to the audio
> >input of the Newt. I do not know how good the A/D converter is accessible
> >from a software point of view. But in any case some software is
> necessary to
> >read the A/D converter output and translate it into a
> temperature reading,
> >put time stamps on it and save it.

> I don't think it would work. They definitely put there a capcitor to cut
> off DC voltage.... You would need to modulate some audible signal with
> voltage, then read signal amplitude from A/D converter...

> Bye!

> Filip Zawadiak mailto:philz_at_vyx.net http://vyx.net/~philz ICQ#25454699

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