LED dimmer

by Karel Keers

Leading Edge (RL), dimming range: 40% (Dutch: Fase aansnijding) Mostly used for non LED bulbs, like incandescent and halogen)

Trailing of Cutting Edge (RC), dimming range: 100% (Dutch: Fase afsnijding)


How to add an adition NTP server to Windows 10, open COMMAND:

reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters” /v NtpServer /t REG_SZ /d “pool.ntp.org,0x1 time1.google.com,0x1 time.windows.com,0x9” /f

Restart the service:

sc config W32Time start=auto

Verify the configuration:

w32tm /query /configuration

Thanks to: https://techexpert.tips/windows/windows-ntp-server-installation/


Use Windows 10 as NTP Server.

Open the command prompt (cmd) as administrator and fire the following commands:

  1. Enable the NTP server service

net stop W32Time
reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\Config” /v LocalClockDispersion /t REG_DWORD /d 0 /f
reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters” /v LocalNTP /t REG_DWORD /d 1 /f
reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\TimeProviders\NtpServer” /v Enabled /t REG_DWORD /d 1 /f
reg add “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\Config” /v AnnounceFlags /t REG_DWORD /d 5 /f
sc config W32Time start=auto
net start W32Time

2. Check if the NTP server is enabled

w32tm /query /configuration

See in the output the 2nd last line, Enabled: 1 (local) is correct.

NtpServer (Local)
DllName: C:\Windows\system32\w32time.dll (Local)
Enabled: 1 (Local)
InputProvider: 1 (Local)

3. Allow rule in the firewall

netsh advfirewall firewall add rule name=”NTP Server” dir=in protocol=udp localport=123 profile=any enable=yes action=allow

4. Test the service from external system

w32tm /stripchart /computer: /samples:4 /dataonly


To enable PING reply in Windows 10 the firewall needs to allow the ping request.

Open the command prompt (cmd) with administrator rights and fire the following command.

netsh advFirewall Firewall add rule name=”PING IPv4 allow” protocol=icmpv4:8,any dir=in action=allow

When you visit a website, online trackers and the site itself may be able to identify you – even if you’ve installed software to protect yourself. It’s possible to configure your browser to thwart tracking, but many people don’t know how.

Panopticlick will analyze how well your browser and add-ons protect you against online tracking techniques. We’ll also see if your system is uniquely configured—and thus identifiable—even if you are using privacy-protective software.


Store the following as a reg file, for example: 64-bit Hide OneDrive From File Explorer.reg

Windows Registry Editor Version 5.00



Download High Sierra from the the App Store and place a formatted USB drive named ‘Untitled’ and fire this command into the terminal. Enter your system password and let it run for several minutes.

sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia —volume /Volumes/Untitled —applicationpath /Applications/Install\ macOS\ High\ Sierra.app

Tip: Press Ctrl+T to check progression.

Thanks to: Macworld

The DD-WRT router database isn’t accurate. The highest stable DD-WRT firmware build available for the WRT54GL v1.1 is build 14929.

Get the dd-wrt.v24_std_generic.bin from:

Source: Peacock Post.


In MacOS Sierra the installer of FileZilla installer ends in an error: Error – Could not initialize the installer.

Read more


Calibrating your DVB-T dongle with R820T(2) chip
First: Installation of RTL-SDR

sudo apt-get update
sudo apt-get install cmake build-essential libusb-1.0-0-dev
cd ~
git clone git://git.osmocom.org/rtl-sdr.git
cd rtl-sdr
mkdir build
cd build
sudo make install
sudo ldconfig

Second: Installation of kalibrate-rlt

cd ~/src
sudo apt-get install libtool autoconf automake libfftw3-dev
git clone https://github.com/asdil12/kalibrate-rtl.git
cd kalibrate-rtl
git checkout arm_memory
sudo make install

Make sure the RTL stick is running for few minutes to let it warm-up. Get a first rough ppm offset estimation with: Read more

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