Here is a very good page explaining the two methods of ultrasonic anemometers.
http://www.dl1glh.de/ultrasonic-anemometer.html

@gohan Where I live we can't have one with moving parts, There is often over 35m/s in the winter storms.
Thats why I bought the Netatmo in the first place. But It's maybe better to build an own, I have a lot of the parts

There is a good one here
https://soldernerd.com/category/arduino-ultrasonic-anemometer/
And another one for a selfbuild like the Netatmo uses with bouncing

@gohan Its static

the top above the transducers are plat and it says in the isntruction that you should avoid touching the area.

I have a broken outdoor sensor with temp, humid, Co2 and so on but there a very small ship on that one

It measure it with four ultrasonic transducers that bounces their beam as you can see in this picture:

Yes you are right, it is costly, but if I with a handheld anemometer and another with "spoons" at the same place can read a windspeed of 18m/s and Netatmo says 7 m/s (and there is nothing to configure regarding to Netatmos support) I would like to be able to do my own calibration.

What Ultrasonic sensor or what did you mean?

Hi,
Anyone rebuilt NETATMO wind sensor to work with mysensors? Or some other system.

I have used Netatmo for about three years now and I am quite disappointed over what I can do with it.

So has anyone rebuild the windsensor to report to another system like mysensors or so.

What I'm after is to use the ultrasonicpart of the sensor and report to my inhouse mysensors gateway.

@bjornhallberg Did you find a good oven to use in Sweden? I'm looking in to building one myself now

Sounds very interesting :)

Has anyone build a cloud/ sun sensor?
I.e is it a sunny day or is it cloudy

Hi,

I just recieved my small CNC mill (that will primarily be used for Laser engraving) and want to try milling some PCB. Anyone has a suggestion an a useful PCB that is single sided and can be used for something fun wihtin MySensors range (or not :) )

Hi all,
Just bought a little CNC + Laser engraver machine that I'm going to use for PCB milling and have some questians for the experienced users.

@Frank-Herrmann will your Chillipeppr code work on all arduino/gcode based CNC routers?

Any other free software like BamCam for use will small projects?

What cutting bits are you using for PCB milling?

Thanks I'll try that

Tried this setup and its not working very well for me, can be a busted PIR but I don't know.
It seems like it sometimes work, but if I leave the room and then enter it can take long time until the PIR triggers.

If i put a LED and a resistor I do that between GND and signal or where do I place it?

@NeverDie

Simplify3D can slice for whatever printer. You just need to configure your printer in the software

@Nicklas-Starkel
I did not with the Soil Moisture sensor. I choose the easy way to use the Xiaomi Mi plant sensor that I check with BlueTooth instead.

But I did succeed with a DHT22 sensor that now have been running 32 days and sending every hour with battery level of 98% now so that one is a success.

I was thinking if I created for example a Slim Node project, I should put it in that area.
Not only the creator of the PCB that the project is based on.

Just to get it simpler to find project based on a specific PCB

Or as I said a pinned topic like this

Example:

Below is sensors based on My Slim 2AA Battery Slim Node found on openhardware.io

Slim Node as a Mini 2AA Battery PIR Motion Sensor
Slim Node Si7021 sensor example

Not so much a request as wishing.

Would it be possible to add a structure under My Project to collect all the SenseBender, Slim Node projects, Easy/Newbie PCB and so on so it would be simpler to find?

A structure like this for example:
My Project
    SenseBender
    Slim Node
    Easy/Newbie PCB

Or to pin a topic for containing links to all projects

This maybe already been up for discussion ?

The negative as I see it:
Small buildarea 120x120x120mm
Quite slow 55mm/s as top speed (that means ~30mm/s in good printing mode)
Open to the air (If you open a windows while printing you can ruin your print)

The positive:
The price :)

I think this could be a good printer as a first printer. You could proberbly hack it