Hi Terry,
Graeme wrote:
> > 4. I see no reason for the values of electrical signals to have
> > changed
They could if any were incorrectly left floating, like Vdd when
parasitically powered.
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Cheers, Ralph.
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On Monday, 30 December 2019 16:17:18 GMT Graeme Gemmill wrote:
> 1. All my sensors are mounted on small circuit boards bought from (now
> defunct) American company Hobby Boards. I believe the temperature
> sensors are powered parasitically, though there is a 5v power injector
> to feed a humidity m
Ralph, Terry: thanks for your comments.
1. All my sensors are mounted on small circuit boards bought from (now
defunct) American company Hobby Boards. I believe the temperature
sensors are powered parasitically, though there is a 5v power injector
to feed a humidity meter.
2. They are connec
On Saturday, 28 December 2019 14:54:52 GMT Terry Coles wrote:
> I'm not sure what to suggest from a diagnostic point of view other than
> measuring the voltage levels with a multimeter when the clock pin is
> disconnected and simply programmed to high. Measuring the frequency and
> pulse shape is
On Saturday, 28 December 2019 14:12:14 GMT Graeme Gemmill wrote:
> I have two 1-wire nets connected to raspberry PIs. The first includes
> two DS1820 temperature sensors and a humidity sensor based on the
> DS2438, which also incorporates an unspecified temperature sensor. The
> second net just co
Hi Graeme,
> I have two 1-wire nets connected to raspberry PIs. The first includes
> two DS1820 temperature sensors and a humidity sensor based on the
> DS2438, which also incorporates an unspecified temperature sensor.
> The second net just contains a humidity sensor with, again,
> unspecified t
I have two 1-wire nets connected to raspberry PIs. The first includes
two DS1820 temperature sensors and a humidity sensor based on the
DS2438, which also incorporates an unspecified temperature sensor. The
second net just contains a humidity sensor with, again, unspecified
temperature sensor.
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