3rd Wattson arrives - Set up and Display

I just got my 3rd Wattson in the mail :-)
Another one, what for ? Well, at 40 EUR, 1/3rd of its value, I could not resist and get it ...


Here it is:
It is a UK version, because there is a UK to European plug adaptor
The transmitter has some splashes of what looks like renovation work, cleaned with a wet cloth
Transmitter batteries show sign of leakage, read 0.15V and one is negative, but it does not matter to me really, they will go to recycle right away

I plug it in right away and it does not read anything, which is normal since it is paired with this transmitter; I push a pin through the middle top hole of the display unit, put my home transmitter in pairing mode (pushing its button for 10 seconds), and it shows 'PAIRING', and few seconds later displays my home Usage ... Easy :-)

I tilt it, and it shows the Money / Spending in GBP, original unchanged settings from the factory; It does not show GENERATION, or NET USAGE, because this option has to be changed in the settings, through the Holmes Software (free download on Energeno / ex DiyKyoto website)

But for now, I just bring it downstairs to place it on the left with the others, so we now have from left to right: Usage, Generation (Solar & ESS), and Net Usage ( = Usage - Generation)

Interesting, isn't it ? Here are a few shots of this new set up while the Solar panels are still producing at bit in the evening

After a while, I turn on my netbook to change the 3rd Wattson settings

Holmes software loading

Drivers installing by themselves

Communication with the Wattson display unit is ready to work

Holmes proposes to download the 28 days of latest Wattson usage records held in its memory, but I skip that part

Now in the Settings / Options tab, I check 'Enable generated logging': by doing this, the display unit will offer the GENERATION & NET USAGE to be displayed

Save & Apply, and that's it

Now if I tilt Wattson, I get the GENERATION

and NET USAGE

DIY ESS - Variable Fan Speed with PWM & Thermistor

This morning, I am experimenting and trying to find a simple solution to make the ESS Fan accelerate when the temperature in the Metal Cabinet is rising and slow down when it is back to an acceptable value

As you already know, the fan is controlled by a PWM kit that I soldered 2 weeks ago and I can adjust its speed using the PWM kit potentiometer; That is already a good step, but I would like to make it better

In the Arduino starter kit I got a year ago, there was a Thermistor and I used it between the negative and the variable output pin of the potentiometer: It looks like it is working, and you can see the pictures and video where I increase or decrease the fan speed using an ice pack and a soldering iron to make the Thermistor resistance change based on the temperature changes

Thermistor temperature

Ice pack temperature

Soldering iron temperature

Cooling the Thermistor after heating it up

Fan speed changes ...

First Nissan LEAF TV ad in France

It can seem strange but this is is very first TV ad for Nissan here, also about the new lower 299 EUR a month lease and the new 7,000 EUR encentive (called "Super Bonus Ecologique" here) from the government

 

"La Nissan LEAF est une réalité. Première familiale 100% électrique commercialisée à grande échelle, la Nissan LEAF a été conçue de A à Z autour de la technologie électrique et propose la sécurité et la polyvalence des meilleures berlines compactes.

Retrouvez la Nissan LEAF sur Facebook www.facebook.com/nissanLEAFfrance"