mahmood – Page 172

Install ShadowSocks on Linux from Source

April 25, 2016

sudo apt-get install qt5-qmake qtbase5-dev libbotan1.10-dev #skip this part if you've already installed these packages
dpkg-buildpackage -uc -us -b

sudo apt-get install qt5-qmake qtbase5-dev libqrencode-dev libqtshadowsocks-dev libappindicator-dev libzbar-dev libbotan1.10-dev
dpkg-buildpackage -uc -us -b

References :
https://github.com/shadowsocks/libQtShadowsocks/wiki/Installation
https://github.com/shadowsocks/shadowsocks-qt5/wiki/Installation

https://github.com/shadowsocks/libQtShadowsocks/wiki/Compiling
https://github.com/shadowsocks/shadowsocks-qt5/wiki/Compiling

How can the CPU analog inputs of the SIMATIC S7-1200 also measure currents of 0-20mA

April 25, 2016

Fig. 01: Connection of a sensor to a voltage source as a 2-conductor connection

Fig. 02: Connection of a sensor to a voltage source as a 3-conductor connection

Fig. 03: Connection of a sensor to a voltage source as a 4-conductor connection

Fig. 04: Connection of a measuring transducer with voltage output to a current source as a 4-conductor connection

References :
https://support.industry.siemens.com/cs/document/67396370/how-can-the-cpu-analog-inputs-of-the-simatic-s7-1200-also-measure-currents-of-0-20ma?dti=0&lc=en-WW

How to connect a sensor to the analog signal modules of SIMATIC S7-1200

April 25, 2016

Fig. 01: Connection of a four-wire sensor

Fig. 02: Connection of a three-wire sensor

Fig. 03: Current measurement with a two-wire sensor

References :
https://support.industry.siemens.com/cs/document/40913432/how-do-you-connect-a-sensor-to-the-analog-signal-modules-of-simatic-s7-1200?dti=0&lc=en-WW
http://www.plctalk.net/qanda/showthread.php?t=12390

PLC Siemens S7-1200 Analog Input Output

April 24, 2016

Analog Input
4-20 mA input that converta to humidity and temperature.

Analog Output
output voltage between 0-5 volts, so MAX number is 13824

PLC Tags

Installing VMware Tools in Kali Linux

April 20, 2016

apt-get update
apt-get install open-vm-tools-desktop fuse
reboot

References :
http://docs.kali.org/general-use/install-vmware-tools-kali-guest
http://www.sysadminshowto.com/how-to-install-official-vmware-tools-in-kali-linux-2-sana/

Install MongoDB as Windows Service

April 18, 2016

mkdir c:\data\db
mkdir c:\data\log

create a file at C:\mongodb\mongod.cfg

systemLog:
    destination: file
    path: c:\data\log\mongod.log
storage:
    dbPath: c:\data\db

Install the MongoDB service

"C:\mongodb\bin\mongod.exe" --config "C:\mongodb\mongod.cfg" --install

Start the MongoDB service

net start MongoDB

Stop or remove the MongoDB service as needed

net stop MongoDB

"C:\mongodb\bin\mongod.exe" --remove

References :
https://docs.mongodb.org/manual/tutorial/install-mongodb-on-windows/

Install Windows Service using Inno

April 17, 2016

[run]
Filename: {sys}\sc.exe; Parameters: "create mysrv start= auto binPath= ""{app}\mysrv.exe""" ; Flags: runhidden

[UninstallRun]
Filename: {sys}\sc.exe; Parameters: "stop mysrv" ; Flags: runhidden
Filename: {sys}\sc.exe; Parameters: "delete mysrv" ; Flags: runhidden

References
http://stackoverflow.com/questions/16517974/inno-setup-installing-windows-services-using-sc-create

Install Windows Service manually

April 16, 2016

Install :

installutil.exe "c:\program files\abc 123\myservice.exe"

Uninstall :

installutil.exe /u "c:\program files\abc 123\myservice.exe"

References
http://stackoverflow.com/questions/8164859/install-a-windows-service-using-a-windows-command-prompt

Optocoupler wiring

April 13, 2016

References :

http://wiring.org.co/learning/basics/optocoupler4n35.html
http://electronics.stackexchange.com/questions/91878/how-to-wire-up-optocoupler-for-digitally-controlled-uv-under-voltage-input-pro

Optocoupler

April 13, 2016

An Optocoupler, also known as an Opto-isolator or Photo-coupler, is an electronic components that interconnects two separate electrical circuits by means of a light sensitive optical interface.

Optocoupler Types
The photo-transistor and photo-darlington devices are mainly for use in DC circuits while the photo-SCR and photo-triac allow AC powered circuits to be controlled. There are many other kinds of source-sensor combinations, such as LED-photodiode, LED-LASER, lamp-photoresistor pairs, reflective and slotted optocouplers.

References :
http://www.electronics-tutorials.ws/blog/optocoupler.html