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Discussion Groups | 68HC12 | HCS12 and Sensor
Join our technical discussions about Freescale Microcontrollers: M68HC12. (Freescale Semiconductor is a Subsidiary of Motorola).
HCS12 and Sensor - Ramsin Savra - Nov 16 14:08:00 2005
Hello group,
Can somebody tell me what sensor I should use to capture temperature of a refrigerator? this is my firs project and I don't know how to select a sensor.
Your help will be appreciated greatly.
Thanks.
---------------------------------
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[Non-text portions of this message have been removed]
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RE: HCS12 and Sensor - Kevin Antony - Nov 16 14:32:00 2005
Try Microchip. I played with a TC1047A and an HC08 processor with success.
Just use the processor's analog to digital converter to measure the output
voltage and calculate the temp based on the datasheet's temp vs. voltage
curve. http://ww1.microchip.com/downloads/en/DeviceDoc/21498c.pdf
Kevin -----Original Message-----
From: 68HC12@68HC... [mailto:68HC12@68HC...] On Behalf Of
Ramsin Savra
Sent: Wednesday, November 16, 2005 12:09 PM
To: 68HC12@68HC...
Subject: [68HC12] HCS12 and Sensor Hello group,
Can somebody tell me what sensor I should use to capture temperature of a
refrigerator? this is my firs project and I don't know how to select a
sensor.
Your help will be appreciated greatly.
Thanks.
---------------------------------
Yahoo! FareChase - Search multiple travel sites in one click.
[Non-text portions of this message have been removed] Yahoo! Groups Links
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Just use the processor's analog to digital converter to measure the output
voltage and calculate the temp based on the datasheet's temp vs. voltage
curve. http://ww1.microchip.com/downloads/en/DeviceDoc/21498c.pdf
Kevin -----Original Message-----
From: 68HC12@68HC... [mailto:68HC12@68HC...] On Behalf Of
Ramsin Savra
Sent: Wednesday, November 16, 2005 12:09 PM
To: 68HC12@68HC...
Subject: [68HC12] HCS12 and Sensor Hello group,
Can somebody tell me what sensor I should use to capture temperature of a
refrigerator? this is my firs project and I don't know how to select a
sensor.
Your help will be appreciated greatly.
Thanks.
---------------------------------
Yahoo! FareChase - Search multiple travel sites in one click.
[Non-text portions of this message have been removed] Yahoo! Groups Links
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: HCS12 and Sensor - Robert L. Harris - Nov 16 14:59:00 2005
Analog Devices AN7414 10-bit digital temperature sensor. Interfaces to
the microprocessor via the I2C port.
Ramsin Savra wrote: > Hello group,
>
> Can somebody tell me what sensor I should use to capture temperature of a refrigerator? this is my firs project and I don't know how to select a sensor.
>
> Your help will be appreciated greatly.
>
> Thanks. >
>---------------------------------
> Yahoo! FareChase - Search multiple travel sites in one click.
>
>[Non-text portions of this message have been removed] >Yahoo! Groups Links >
>
>---------------------------------------------------------------------------------------------------
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>--------------------------------------------------------------------------------------------------- --
Bob Harris
Can MOTCH Katmai Henry David Thoreau, UDX, Bda UD (1992-2005)
Longmeadow Bradford Torrey, CD
Bath, NH
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
the microprocessor via the I2C port.
Ramsin Savra wrote: > Hello group,
>
> Can somebody tell me what sensor I should use to capture temperature of a refrigerator? this is my firs project and I don't know how to select a sensor.
>
> Your help will be appreciated greatly.
>
> Thanks. >
>---------------------------------
> Yahoo! FareChase - Search multiple travel sites in one click.
>
>[Non-text portions of this message have been removed] >Yahoo! Groups Links >
>
>---------------------------------------------------------------------------------------------------
>Text inserted by Panda Platinum 2005 Internet Security:
>
> This message has NOT been classified as spam. If it is unsolicited mail (spam), click on the following link to reclassify it: http://127.0.0.1:6083/Panda?ID=pav_7051&SPAM=true
>--------------------------------------------------------------------------------------------------- --
Bob Harris
Can MOTCH Katmai Henry David Thoreau, UDX, Bda UD (1992-2005)
Longmeadow Bradford Torrey, CD
Bath, NH
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: HCS12 and Sensor - Michal Konieczny - Nov 16 15:24:00 2005
> Can somebody tell me what sensor I should use to capture temperature of a
refrigerator? this is my firs project and I don't know how to select a sensor.
>
> Your help will be appreciated greatly.
What accuracy and resolution do you expect ?
--
Michal Konieczny
mk@mk@....
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
>
> Your help will be appreciated greatly.
What accuracy and resolution do you expect ?
--
Michal Konieczny
mk@mk@....
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: HCS12 and Sensor - Werner Wittig - Nov 16 15:57:00 2005
Hello Ramsin,
I just repared a refrigerator with a DS18B20 from MAXIM (see maxim-ic.com). It
guarantees +/- 0.3 centigrad and is controlled by a
"1-Wire-Interface". Gives you the temperature digitally.
I used it with a HC11 at port D (1 pin needed, must be
open-collector). They use a special protocoll but have good examples
how to implement it.
mailto:whsw@whsw...
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
I just repared a refrigerator with a DS18B20 from MAXIM (see maxim-ic.com). It
guarantees +/- 0.3 centigrad and is controlled by a
"1-Wire-Interface". Gives you the temperature digitally.
I used it with a HC11 at port D (1 pin needed, must be
open-collector). They use a special protocoll but have good examples
how to implement it.
mailto:whsw@whsw...
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: HCS12 and Sensor - ramsinsavra - Nov 17 6:09:00 2005
Nice! thanks indeed for your suggestion. Also, I have one more
question. What about UPS level?
I need to check a UPS level connected to the refrigerator and I was
told that I should use a special resistance in order to decrease the
votage. How do I know which voltage is the appropriate one?
I'm totally new to this exciting field.
Thanks again. --- In 68HC12@68HC..., Werner Wittig <whsw@w...> wrote:
>
> Hello Ramsin,
>
> I just repared a refrigerator with a DS18B20 from MAXIM (see maxim-
ic.com). It
> guarantees +/- 0.3 centigrad and is controlled by a
> "1-Wire-Interface". Gives you the temperature digitally.
>
> I used it with a HC11 at port D (1 pin needed, must be
> open-collector). They use a special protocoll but have good examples
> how to implement it.
>
> mailto:whsw@w...
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: HCS12 and Sensor - ramsinsavra - Nov 17 6:10:00 2005
1.5 ~ 4.5 degree
--- In 68HC12@68HC..., Michal Konieczny <mk@c...> wrote:
>
> > Can somebody tell me what sensor I should use to capture
temperature of a refrigerator? this is my firs project and I don't
know how to select a sensor.
> >
> > Your help will be appreciated greatly.
>
> What accuracy and resolution do you expect ?
>
> --
> Michal Konieczny
> mk@c...
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: HCS12 and Sensor - ramsinsavra - Nov 17 6:13:00 2005
Thanks a lot for your advice.
--- In 68HC12@68HC..., Kevin Antony <kevin.antony@a...> wrote:
>
> Try Microchip. I played with a TC1047A and an HC08 processor with
success.
> Just use the processor's analog to digital converter to measure the
output
> voltage and calculate the temp based on the datasheet's temp vs.
voltage
> curve. http://ww1.microchip.com/downloads/en/DeviceDoc/21498c.pdf
>
> Kevin > -----Original Message-----
> From: 68HC12@68HC... [mailto:68HC12@68HC...] On
Behalf Of
> Ramsin Savra
> Sent: Wednesday, November 16, 2005 12:09 PM
> To: 68HC12@68HC...
> Subject: [68HC12] HCS12 and Sensor > Hello group,
>
> Can somebody tell me what sensor I should use to capture
temperature of a
> refrigerator? this is my firs project and I don't know how to
select a
> sensor.
>
> Your help will be appreciated greatly.
>
> Thanks. >
> ---------------------------------
> Yahoo! FareChase - Search multiple travel sites in one click.
>
> [Non-text portions of this message have been removed] > Yahoo! Groups Links
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )
Re: HCS12 and Sensor - ramsinsavra - Dec 4 16:02:00 2005
Hello Werner,
I got the sensor finally. In your email you had mentioned that there
are good examples of it. Can you send me a reference?
Also, does it matter (in terms of performance) if I connect a Vdd to
the power pin, instead of connecting it to GND? Thanks in advance.
--- In 68HC12@68HC..., Werner Wittig <whsw@w...> wrote:
>
> Hello Ramsin,
>
> I just repared a refrigerator with a DS18B20 from MAXIM (see maxim-
ic.com). It
> guarantees +/- 0.3 centigrad and is controlled by a
> "1-Wire-Interface". Gives you the temperature digitally.
>
> I used it with a HC11 at port D (1 pin needed, must be
> open-collector). They use a special protocoll but have good examples
> how to implement it.
>
> mailto:whsw@w...
(You need to be a member of 68hc12 -- send a blank email to 68hc12-subscribe@yahoogroups.com )