[werk_ag]

3D Printed Radiation Shield for Meteo Stations - Part 5

Installing the extended I²C bus circuit.

Due to the very small size of the WeatherDuino I²C bus expander circuit (other models are small too), my first attempt was installing it on the sensor mounting piece right below the T/H sensor. This has proven being a big mistake. Don't do it.



Despite the circuit don't produce any detectable warm, the true is that after having installed my new RS side by side with the one I use as reference, the readings from the new one were consistently around 1.5ºC higher. This value is far from the maximum error of the sensor, so something was wrong. Initially I though the cause was the sensor protection chamber, and removed it. The high readings continued... then I removed the sensor mounting piece from inside the RS, and exposed the sensor to wind. The readings started to be very similar to my reference, with just 0.1ºC or 0.2ºC difference.
Then I realized that I would have to find another solution to place the I²C bus expander circuit, while keeping the main vantage of the RS, which is the easy removal of the sensor.
Thus was born the small box under the wall mounting piece of the RS. Now, with ²C bus expander circuit installed on the small box the readings from the new sensor are inline with my reference. I'm monitoring the logs of both for three days.

...

I think there isn't much more to say, just a few more pictures will be enough to illustrate the final construction steps of the 3D printed Radiation Shield.





And here is it, ready for the job!




STL files for 3D print this Radiation Shield are on next topic,