We’ve been watching an excellent crowdfunded documentary series called Woodlanders. It brought to our attention a guy working to reintroduce the chestnut tree to American forests. We couldn’t believe it was even possible to acquire young chestnuts so we pretty much had to place an order. It arrived this week and to our surprise it still had leaves from the season previous. This is when it hit us what it meant to be planting this.
Mandala session on a huge touch screen
Spring finally showed up
As green as it gets
Solar monitoring back online
The solar instrumentation has been lacking for a couple of months since the solar panels’ current sensor blew up. It took 2 months because there has been a lot mistakes and learning along the way. It should have been simple, replace the 30A sensor by a 100A one right?
Well it wasn’t. First I ordered the wrong 100A sensor, meant for AC use. Then I had a myriad of issues around calibration.
- at the 5V input port, a 0V reading didn’t translate to 0A, this sensor goes from -100A to 100A so it is 2.5V which translate to 0A.
- with the skew from miscalibration, the value I was getting made no sense for what I know the panels can make
- orientation matters as again, this sensor can read negative values
- a cloudy day makes fluctuations hard to detect
- moving the sensor from one interface kit to another after calibration resulted in another skew.
All these little things I could have picked on their own, but together they conspired to make me thoroughly confused and left me seeking support from the Phidgets forums. I was once more impressed by Phidgets, the help I got was fast and efficient. Phidgets are more expensive but I was proven once more that they are worth every penny. They have many other advantages, I have nothing but good things to say about them.
Calibration, I really need to tidy things up in there
I’ve learned a LOT of lessons with this one. Not the least of which is to be ok with the imperfections of analog data. I’m a discrete data type of guy, it doesn’t come naturally to accept skews & variations.
Too early for berry
Sugaring over
Shiplap all over
Rorschach Stream
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