Recent Posts

Pages: [1] 2 3 ... 10
1
So I completed and installed my DIY probe made out of a Pilot Pin.  Obviously the hardest part is getting the wires connected to socket the connector.  I can tell you that those solder cup connectors I ordered from Mouser where no easier to work with and seemed more fragile.  Ended up using the connector I was originally going to use.  After a lot of patience I protected the connections with 4 very small heat sink wraps for each of the 4 wires and then covered that one with a larger wrap that covered the shielded part of the cable to the body of the connector itself.  I then fit the connector through a slot in a piece of pcb board which of cut and shaved into a round piece that would fit into the body of the pin.  All of this was done using a Dremel Tool.  This was all sealed and weatherproofed with hot glue. 

Where the sht75  (and hopefully a future 35) plugs in, fits perfectly into an Viasala HMP60 filter housing. It does not screw in but the fit is quite snug and I doubt anything could get through.  At first I was using the gel grip in the pin to further seal the filter and pin housing but noticed that it was generating static charge so I removed it.  I think filter is very well sealed but I might wrap some electrical tape around it just to be sure.  Here are some pics.  I will say it will be very nice to be able to remove and replace the probe with ease into the MeteoShield Pro which I have decided to use at least for now.
Nice. I like the creativity there. If you had removed the clip from the pen I would've thought it was meant for holding a temp probe.  :grin:

Is that data available online?

Thanks!  Yes I upload to Wunderground and CWOP.
 https://www.wunderground.com/personal-weather-station/dashboard?ID=KNCBELMO18#history
https://weather.gladstonefamily.net/site/D5686

Ended up using the connector I was originally going to use.

Which one was that?
Here they are. The post are a little more flexible that the other ones so you can spread the pins out some. Not too much though.
https://www.mouser.com/ProductDetail/Harwin/M50-3030442?qs=sGAEpiMZZMs%252bGHln7q6pm8Vn94ktop%2fJmuuS%252b8ZjnXtI6OeGFBMW0g%3d%3d

How does the raw readings of the 75 humidity sensor compares to the airport? Why I ask is that you have done some offset stuff on WD.

The way I have it done on WD the adjusted readings and the raw readings from the sht75 are the same. But in the high end the raw readings only will reach 97-98% my adjusted reading will go to 100%.  I guess the short answer would be it tracks pretty darn close to local ASOS stations.

Edit: When I say the adjusted and raw readings are the same I meant through the mid ranges <75%.
2
So I completed and installed my DIY probe made out of a Pilot Pin.  Obviously the hardest part is getting the wires connected to socket the connector.  I can tell you that those solder cup connectors I ordered from Mouser where no easier to work with and seemed more fragile.  Ended up using the connector I was originally going to use.  After a lot of patience I protected the connections with 4 very small heat sink wraps for each of the 4 wires and then covered that one with a larger wrap that covered the shielded part of the cable to the body of the connector itself.  I then fit the connector through a slot in a piece of pcb board which of cut and shaved into a round piece that would fit into the body of the pin.  All of this was done using a Dremel Tool.  This was all sealed and weatherproofed with hot glue. 

Where the sht75  (and hopefully a future 35) plugs in, fits perfectly into an Viasala HMP60 filter housing. It does not screw in but the fit is quite snug and I doubt anything could get through.  At first I was using the gel grip in the pin to further seal the filter and pin housing but noticed that it was generating static charge so I removed it.  I think filter is very well sealed but I might wrap some electrical tape around it just to be sure.  Here are some pics.  I will say it will be very nice to be able to remove and replace the probe with ease into the MeteoShield Pro which I have decided to use at least for now.
Nice. I like the creativity there. If you had removed the clip from the pen I would've thought it was meant for holding a temp probe.  :grin:

Is that data available online?

Thanks!  Yes I upload to Wunderground and CWOP.
 https://www.wunderground.com/personal-weather-station/dashboard?ID=KNCBELMO18#history
https://weather.gladstonefamily.net/site/D5686

Ended up using the connector I was originally going to use.

Which one was that?
Here they are. The post are a little more flexible that the other ones so you can spread the pins out some. Not too much though.
https://www.mouser.com/ProductDetail/Harwin/M50-3030442?qs=sGAEpiMZZMs%252bGHln7q6pm8Vn94ktop%2fJmuuS%252b8ZjnXtI6OeGFBMW0g%3d%3d

How does the raw readings of the 75 humidity sensor compares to the airport? Why I ask is that you have done some offset stuff on WD.
3
Meteohub/Meteobridge / Re: Meteobridge and WeatherFlow
« Last post by galfert on Today at 10:08:06 PM »
Hmmmm....okay.  So to maybe to block the upload and change the data and view the Live Data tab. I suppose those are good enough reasons.

But too bad I can't make use of it with my station hardware to upload to WeatherFlow cloud network.

Maybe I can pickup a used WeatherFlow on eBay cheap in a few months.  :lol:
It doesn't need to work, so a broken one would be perfect. All I need is a serial number. I don't actually need the hardware.

But now that I think of it maybe it won't work even if I was able to create a WeatherFlow station ID. Because my hardware doesn't have lighting data to send or maybe something else is not compatible. So maybe it will be rejected. I guess this is just something to tinker with in the future. Or maybe someone with more than one station hardware (one of them being a WeatherFlow) could do some testing and see if WeatherFlow network will accept data from different hardware.

Thank you for the insight and discussion.
4
Looks like other shields got dinged for running cooler also.

According to that study, the author thinks the Davis passive is better than the Davis FARS...
5
Looks like other shields got dinged for running cooler also.
6
The Venturi effect, assuming its more than negligible, would apply to all shields since they restrict air flow greatly compared to the surrounding environment.
Not that it's a measurable factor to our sensors, but not only, compressed air heats, not cools.

I believe the thinking with Venturi is that as a mass of air enters a constriction (inner chamber of shield in this instance), the pressure actually drops as it elongates. And I guess people are assuming that a drop in pressure corresponds to a drop in temperature? If this is true, then someone needs to explain why air expands as it warms and drops in pressure (unless constrained on all sides like in a pressure cooker).

I think you are confusing pressure and density.  As air warms in the open atmosphere its pressure remains the same but it decreases in density and thus expands.  If you warm air in a pressure cooker air will try to expand and take up more volume as the temperatures rise. However since it is constrained like you said its pressure rises proportionally to temperature.

In theory a venturi tube works like this.  As air flows though a narrower section of pipe its velocity increases and as a result its static pressure.  As a result of this pressure decrease you should get a drop in temperature where the pipe narrows.
7
So I completed and installed my DIY probe made out of a Pilot Pin.  Obviously the hardest part is getting the wires connected to socket the connector.  I can tell you that those solder cup connectors I ordered from Mouser where no easier to work with and seemed more fragile.  Ended up using the connector I was originally going to use.  After a lot of patience I protected the connections with 4 very small heat sink wraps for each of the 4 wires and then covered that one with a larger wrap that covered the shielded part of the cable to the body of the connector itself.  I then fit the connector through a slot in a piece of pcb board which of cut and shaved into a round piece that would fit into the body of the pin.  All of this was done using a Dremel Tool.  This was all sealed and weatherproofed with hot glue. 

Where the sht75  (and hopefully a future 35) plugs in, fits perfectly into an Viasala HMP60 filter housing. It does not screw in but the fit is quite snug and I doubt anything could get through.  At first I was using the gel grip in the pin to further seal the filter and pin housing but noticed that it was generating static charge so I removed it.  I think filter is very well sealed but I might wrap some electrical tape around it just to be sure.  Here are some pics.  I will say it will be very nice to be able to remove and replace the probe with ease into the MeteoShield Pro which I have decided to use at least for now.
Nice. I like the creativity there. If you had removed the clip from the pen I would've thought it was meant for holding a temp probe.  :grin:

Is that data available online?

Thanks!  Yes I upload to Wunderground and CWOP.
 https://www.wunderground.com/personal-weather-station/dashboard?ID=KNCBELMO18#history
https://weather.gladstonefamily.net/site/D5686

Ended up using the connector I was originally going to use.

Which one was that?
Here they are. The post are a little more flexible that the other ones so you can spread the pins out some. Not too much though.
https://www.mouser.com/ProductDetail/Harwin/M50-3030442?qs=sGAEpiMZZMs%252bGHln7q6pm8Vn94ktop%2fJmuuS%252b8ZjnXtI6OeGFBMW0g%3d%3d
8
I just got the WiFi logger.   Going to update the firmware and get it online.   Nice hardware....

As noted below by the maker of this great tool, you donít need to update the html files if your system had 1.19. If you just purchased yours new, that is not very likely so be sure and include the 10+ html files for updating if your firmware is 1.18 or earlier.
9
Ended up using the connector I was originally going to use.

Which one was that?
10
I just got the WiFi logger.   Going to update the firmware and get it online.   Nice hardware....
Pages: [1] 2 3 ... 10