Today I noticed that some Windows servers were not applying the correct GPOs (Group Policy Objects). Troubleshooting the problem, I found the event id 1065 in the Windows eventlog: A GPO was indeed configured with a WMI filter and the server, not being able for some reason to perform a filter check, aborted all the processing of the policies.…
In this tutorial, I’ll show you how to replace the stock transmitter of your Turnigy 9x with a more advanced module by FrSky. The FrSky module has many advantages: [checklist] it can cover more distance it’s more robust in the presence of noise it can receive telemetry data it supports different rx modules [/checklist] On the Internet is available…
I found that Troniqa webshop sells a membrane potentiometer named SoftPot (datasheet): This potentiometer, that is available in lengths of 10 and 20cm, changes its resistance depending on the point on which pressure is applied. The connection to Arduino is very simple and doesn’t differ from what is explained in the official tutorial for a “normal” potentiometer: I connected 5V to pin…
Irrighino is a complete watering system, based on Arduino Yun. The main features are: [checklist] a configurable number of solenoid valves an AJAX web interface a weekly schedule manual activation / deactivation [/checklist] Here’s a short video that describes the project: How it works An Arduino Yun – the “brain” of irrighino – is connected to the switch panel…
On the market you can now find leds that also include a control chip (WS2811, WS2812, APA106…). The main advantages of this kind of leds are: [checklist] you can control them using just one digital pin they can be connected in cascade but still individually controlled they can be supplied with 5V without the need of…
One of the most common errors when you start writing your sketches for Arduino is the excessive use of the delay() function. This function, as explained in the official documentation, pauses the program for the specified number of milliseconds. Let’s see an example: you connected to your Arduino a button and a led: when you press the button, the led…
After having emptied a datastore on my vSphere cluster (using the Storage vMotion feature to hot move the virtual machines) I tried to delete it but I got the following error message: The resource <datastore-id> is in use Browsing the datastore, I wasn’t able to find any files that could explain why it was in use… I had…
Some days ago, my Hubsan H107L X4 miniquad, from Banggood, stopped working: even if I connected a fully-charged battery, it didn’t move or light. Therefore, I ordered from Banggood a flight control board (they call it receiver board) to replace the faulty one: After having opened the quadcopter frame (fixed with three screws) and having unsoldered the old board, I started…
The Cisco Discovery Protocol (CDP) is a Cisco proprietary protocol to share information between directly connected network devices. It’s very useful, especially in a complex network, to discover its topology, for example which switch port a server is connected to. In addition to CDP and other proprietary protocols, a IEEE standard protocol exists, the Link Layer Discovery Protocol…
The Turnigy 9x transmitter (here the Mode2 version on the Hobbyking’s website) is for sure one of the most chosen radio by who start playing with multicopters (and not only with them…). One of the most reported flaws is its software, that doesn’t offer “advanced” features as some more expensive transmitters and that sometimes it’s also difficult to use. For this reason some…