build your own temp/hum sensor for vp2

I got the shield in the other day and it was very easy to change out. All i had to do was remove the top plates of the shield to get to the fan and remove it so i could get the sensor board out and snap the temp/hum sensor on it, then i just slide the board back in place, routed the cable like it showed and reassembled it. It took about 10 minutes to do. I do not know why Davis doen not sell a retrofit. It would be even easier if it came with the sensor already installed. All you would have to do is mount it to the rain base with the shorter screws and pull out two plastic tabs to active the nicad batteries. You could keep the old sensor for a spare. It works just fine and i compared it to the daytime fars that i converted to 24 hr and the converted shield compares pretty close. I also compared the daytime fars and was not too impressed with the results. The fan starts running after the sun has been up a couple of hours because the sun has to hit the solar panel to get it running and does not have enough umph with just daylight showing. It stops running just before the sun goes down. You have to have the 24 hr solar panel to make the fars work right. The fan runs when daylight breaks. The fan only helps during the day when the wind it light. The 24 hr fars works good at night when the wind lays and you get a more consistant changing of humidity and temp. The daytime fars lags behind on that score as does my stevenson screen. They both catch up after some time and the temp and hum readings have slowed down later at night.

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