DS1620 thermometer
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Posts: 46,084
Hi Stampers,
I need to measure the temperature on 3 different places, and I dont want to eat
up all Stamp pins for that.
Is there a way to 'network' the 3 DS1620 ? I've got my idea, but I'd like to
have another advice.
Thanks in advance.
Phil.
[noparse][[/noparse]Non-text portions of this message have been removed]
I need to measure the temperature on 3 different places, and I dont want to eat
up all Stamp pins for that.
Is there a way to 'network' the 3 DS1620 ? I've got my idea, but I'd like to
have another advice.
Thanks in advance.
Phil.
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
Try the DS1820 or DS1920 1-Wire Devices. You can build a MicroLAN.
Claus
BASIC Stamp 2nd Ed. ISBN 0750672455
In our next BS book 1-Wire examples are included.
> Hi Stampers,
>
> I need to measure the temperature on 3 different places, and I dont
want to eat up all Stamp pins for that.
> Is there a way to 'network' the 3 DS1620 ? I've got my idea, but
I'd like to have another advice.
> Thanks in advance.
>
> Phil.
Reset line. The Reset line behaves like a chip select. Make sure that you
put a 1K resistor between each chip's DQ line and the data bus. This will
prevent short circuit problems caused by a possible bus conflict.
If you move up to the BS2p, you can use Dallas 1-Wire thermometers and string
nearly as many as you'd like on a single Stamp pin.
-- Jon Williams
-- Applications Engineer, Parallax.
In a message dated 8/8/01 3:00:52 AM Central Daylight Time,
derennep@b... writes:
> I need to measure the temperature on 3 different places, and I dont want to
> eat up all Stamp pins for that.
> Is there a way to 'network' the 3 DS1620 ? I've got my idea, but I'd like
>
[noparse][[/noparse]Non-text portions of this message have been removed]
comercial environment. Why is the BS2p necessary, and not the BS2? Is there
any sample code for interfaceing with the 1-Wire units?
Thanks
Nick
> If you move up to the BS2p, you can use Dallas 1-Wire thermometers and
string
> nearly as many as you'd like on a single Stamp pin.
>
> -- Jon Williams
> -- Applications Engineer, Parallax.
>
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lightclb@y... writes:
> Sorry for the stupid question, but I am looking at using these in a
> comercial environment. Why is the BS2p necessary, and not the BS2? Is there
>
The BS2p has direct support for 1-Wire with new commands (OWOUT and OWIN).
It also supports high-speed and bit-mode access. There is no simpler way to
deal with 1-Wire devices than with the BS2p. I demonstrated it for Dallas
Semiconductor and even they were impressed.
You can't use the BS2 directly since it isn't fast enough to synthesize the
1-Wire protocol. You can use an interface, like the one from Steve Parkiss.
Take a look at...
http://home.earthlink.net/~parkiss/
...for info and BS2 code samples for Steve's chip.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas, TX
[noparse][[/noparse]Non-text portions of this message have been removed]
I just wonder if the sharing of the Clock lines will not cause conversion
problems. The function of the DS1620 depends on the way the clock line is
managed. If it goes low and stays low, then a continuous convertion begins.
If it goes low and then high in 10 ms max, then a single conversion begins.
So, if I use the same line for three devices, I think I must pay attention
to this, and maybe send clock pulses larger than 10 ms. What to you think ?
Best regards,
Phil.
Original Message
> The Clock and DQ lines can be shared, but each chip will require its own
> Reset line. The Reset line behaves like a chip select. Make sure that
you
> put a 1K resistor between each chip's DQ line and the data bus. This will
> prevent short circuit problems caused by a possible bus conflict.
>
> If you move up to the BS2p, you can use Dallas 1-Wire thermometers and
string
> nearly as many as you'd like on a single Stamp pin.
>
> -- Jon Williams
> -- Applications Engineer, Parallax.
with a CPU. The Clock/Conv line is used to start conversions when the device
is programmed for stand-alone operation.
-- Jon Williams
In a message dated 8/12/01 3:47:32 AM Central Daylight Time,
derennep@s... writes:
> I just wonder if the sharing of the Clock lines will not cause conversion
> problems. The function of the DS1620 depends on the way the clock line is
> managed. If it goes low and stays low, then a continuous convertion begins.
> If it goes low and then high in 10 ms max, then a single conversion begins.
> So, if I use the same line for three devices, I think I must pay attention
>
[noparse][[/noparse]Non-text portions of this message have been removed]
Thanks again,
Phil.
Original Message
From: <jonwms@a...>
To: <basicstamps@yahoogroups.com>
Sent: Sunday, August 12, 2001 3:14 PM
Subject: Re: [noparse][[/noparse]basicstamps] DS1620 thermometer
> This won't be a problem since you're going to initialize the DS1620s to
work
> with a CPU. The Clock/Conv line is used to start conversions when the
device
> is programmed for stand-alone operation.
>
> -- Jon Williams
>
>
> In a message dated 8/12/01 3:47:32 AM Central Daylight Time,
> derennep@s... writes:
>
> > I just wonder if the sharing of the Clock lines will not cause
conversion
> > problems. The function of the DS1620 depends on the way the clock line
is
> > managed. If it goes low and stays low, then a continuous convertion
begins.
> > If it goes low and then high in 10 ms max, then a single conversion
begins.
> > So, if I use the same line for three devices, I think I must pay
attention
> >
>
>
>
>
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
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