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calcul valoare condensator motor trifazic legat la monofazic

To connect our 380v tri motor in 220v mono (phase + neutral), we will use the triangle coupling.
We will connect for example: the phase in “u”, the neutral in “v”, and it will be necessary to add a capacitor between “v” and “w”
Very important !The capacitor must have a voltage greater than 230V and must be AC ??~, NEVER use a polarized capacitor otherwise it will explode!The usual value of the capacitor is expressed in micofarad “µf”
To find its value it is enough to multiply the power in CV by 50.
Example: a 250w motor (0.25kw)

to begin, you have to convert Watts into horses. for this we divide the watts by 736 (1 CV = 736 W)
In our example 250/736 = 0.34 HP, our engine is 0.34 HP.
To find the value of the capacitor: 0.34 x 50 = 17, so to operate the motor of 0.25kw requires a capacitor of 17 μf.
If the value of the capacitor is less than 17 μf, the motor will work much worse, or not at all.If the value is greater than 17 μf it is not annoying at all.

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downgrade windows 7

Choose Run and write regedit.

Go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion

Change the keys EditionID and ProductName.

EditionID can be found in your Windows 7 installation CD under sources\ei.cfg.

ProductName will be shown when you try to install and are denied:

Windows 7 Ultimate cannot be upgraded to Windows 7 Home Premium

Here the Windows 7 Home Premium is the ProductName.

Make sure that it matches exactly.

This procedure worked like a charm for me!

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make windows bootable after motherboard swap

In the BIOS, i went change the SATA to IDE mode (NOT RAID, NOT AHCI)

1.Boot Win7 DVD

2.Choose the Language Selection.

3.Choose Repair.

4.On the recovery tools choose the Command Line Console

5.Type:regedit <ENTER>

7.Highlight HKEY_LOCAL_MACHINE

8.File > Load Hive

9.Select < windows partition with problem > \Windows\System32\config\system (Backup this first, it’s advised)

10.Regedit will ask for a Key name: Name it something like “temp”

11.Located HKEY_LOCAL_MACHINE/temp/Select/Current

12.Searched for every key containing the value “SCSI Miniport” where the “Start” value was a “3” and changed the “Start” value to a “0”. (F3 to search next result).

13.Highlight “temp”

14.File > Unload Hive

15.Restart

16.Enter in Win7 🙂

vezi si https://social.technet.microsoft.com/Forums/es-ES/19c703a4-f52a-4b90-8a8c-fd80cbaf9c7a/windows-7-no-boot-stop-0x0000007b-and-classpnpsys-problem?forum=w7itprogeneral

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install nxfilter on osmc

sudo apt-get install oracle-java8-jdk

sau

sudo apt-get install openjdk-8-jre-headless

wget http://pub.nxfilter.org/nxfilter-4.3.8.2.deb

sudo dpkg -i nxfilter-4.3.8.2.deb

sudo systemctl enable nxfilter.service

sudo systemctl start nxfilter.service

Enable IP authentification. The clients will be authenticated by NxFilter using the IP address. For that configure your network to assign a static IP for each client.

vezi si

Parental control with DNS filtering on Raspberry Pi

sudo nano /nxfilter/bin/startup.sh

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install module pycryptodomex on osmc

v1:
sudo apt-get install python-crypto
sudo apt-get install python-pip
sudo apt-get install build-essential

sudo pip install -U setuptools
sudo pip install wheel

sudo pip install pycryptodomex

v2:

sudo apt-get install python-pip python-crypto build-essential -y
sudo apt-get install python-all-dev python-setuptools python-wheel -y
sudo apt-get install python-crypto-dbg python-crypto-doc python-pip-whl -y
pip install pycryptodomex
sudo ln -s /usr/lib/python2.7/dist-packages/Crypto /usr/lib/python2.7/dist-packages/Cryptodome