Thank very much.
Peter
On Sun, Feb 24, 2013 at 11:38 AM, Paul Alfille <[email protected]>wrote:
> They're new and a little hidden.
>
> http://www.embeddeddatasystems.com/OW-IO-AI8--Octal-Analog-Input_p_207.html
>
> Support just added in the last release. They have several versions,
> including 4 or 8 channels and current or voltage, as well as +/- relays.
>
> Paul
>
>
> On Sun, Feb 24, 2013 at 1:59 PM, Peter Hollenbeck <[email protected]>wrote:
>
>> 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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