Paul,
I can't find the EDS008X. Can you tell me where to look?
Thanks,
Peter
P.S.
We all appreciate your great work.
PH
On Sun, Feb 24, 2013 at 4:15 AM, Paul Alfille <[email protected]>wrote:
> There are many voltage monitoring chips, including the battery monitors
> (The DS2438 and DS276X DS277X and DS278X).
>
> The DS2438 is used in many designs because it is cheap, easy to work with
> and can be powered by the battery it is monitoring. (It also measures
> current and temperature). It's range is 0-10V so you'll need a voltage
> divider (measure between two large resistors).
>
> There are also excellent 3rd party devices like EDS's new EDS008X series
> with 4 or 8 voltage measurments and the ability to trigger alarms and trip
> relays. The 1wire bus master is used for recording and setting the
> parameters, but the monitoring is done by the device's microcontroller.
>
> Finally, if you are measuring a computer's voltage, many CPUs generate
> that data themselves (just look at the BIOS page for "System Health") --
> though the CPU voltages are usually in the sub 3V range.
>
>
> On Sun, Feb 24, 2013 at 6:24 AM, Attila <[email protected]> wrote:
>
>> I tried DS2450 - and decided NEVER use it again.
>> It is a very low quality AD converter. Read values are jumping very much,
>> and I could not fix it by oversampling. Even using 100x oversampling the
>> read voltage was jumping a lot.
>> Comparing to MCP3008 SLI interface AD converter it is a crap. (MCP3008
>> is also "jumping " +-1 value, but with 10x times oversampling it can be
>> fixed quite well - while DS2450 was not able to reach it even with 100x
>> oversampling)
>>
>> Datasheet tells that DS2450 is ONLY a 8 bit AD, 2 least significant bits
>> arejust a "guess" - take this into consideration as well.
>>
>> As I know there are other chips (battery monitor, I can't recall its
>> name) what can be used for AD conversion on 1wire bus - but I never tried
>> these
>>
>> Attila
>>
>>
>> On Sun, Feb 24, 2013 at 3:37 AM, Peter Hollenbeck <[email protected]>wrote:
>>
>>> I wish to sense the voltage in a nominal 12 volt system. I have seen the
>>> DS2450 recommended and I also see a MS-TV Voltage Sensor from
>>> iButtonLink.com.
>>>
>>> I would appreciate comments and suggestions on a good way to do this job.
>>>
>>> Is a 1Wire master always required? I have a Hobby Boards serial master
>>> and it works fine but the voltage sensor will be on a different computer.
>>>
>>> Thank you,
>>> Peter Hollenbeck
>>> Electronics Ignoramus.
>>>
>>>
>>>
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>>
>>
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>
>
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