Friday, October 26, 2018

How to permanently disable cortana in windows 10

Cortana is a built in virtual assistant app for windows10. It was designed to make user’s convenience and helping them on a lot of tasks. It’s like as apple’s digital assistant “Siri”. Cortana can recognize your voice and answer questions using information from your device and Bing Search engine. She uses user data to try and anticipate with the user’s needs. She also offers personalize recommendation and serve users based on their location and past behavior. Also she can set a reminder, set an alarm, compose an email, calculate math, locate anything in device, search the web and so on.

After all Cortana is an awesome tool in our consideration. But some people worried about using cortana for the sake of privacy. Because Cortana monitor pc usages, indexes and stores user information also may collect data people would rather to keep private.

After an update of “Windows 10 Anniversary Edition”, Cortana is more integrated than ever before and with every major update it’s going more integral to Windows Operating System. Also Cortana tightly deployed with Windows Search. So if you want to disable Cortana, you may lose some feature functionality such as reminders, news etc. Microsoft Help page noticed that, “Cortana can’t be entirely turned off.” So it’s our milestone to completely disable virtual assistant “cortana” but not “windows search.”

Easy steps to remove cortana

  • Go to Start Menu and type CMD
  • In the search result right click on Command Promt
  • Click Run as administrator.
disable cortana in windows 10

  • A command panel will appear like this(below).

disable cortana in windows 10

  • Run these command step by step.
reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /v "AllowCortana" /t REG_DWORD /d "0" /f reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /v "AllowCortanaAboveLock" /t REG_DWORD /d "0" /f reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /v "DisableWebSearch" /t REG_DWORD /d "1" /f reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /v "AllowSearchToUseLocation" /t REG_DWORD /d "0" /f reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /v "ConnectedSearchPrivacy" /t REG_DWORD /d "3" /f reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /v "ConnectedSearchSafeSearch" /t REG_DWORD /d "3" /f reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /v "ConnectedSearchUseWeb" /t REG_DWORD /d "0" /f reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows\Windows Search" /v "ConnectedSearchUseWebOverMeteredConnections" /t REG_DWORD /d "0" /f reg add "HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules" /v "Block Cortana ActionUriServer.exe" /t REG_SZ /d "v2.26|Action=Block|Active=TRUE|Dir=Out|RA42=IntErnet|RA62=IntErnet|App=C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\ActionUriServer.exe|Name=Block Cortana ActionUriServer.exe|Desc=Block Cortana Outbound UDP/TCP Traffic|" /f >nul 2>&1 reg add "HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules" /v "Block Cortana PlacesServer.exe" /t REG_SZ /d "v2.26|Action=Block|Active=TRUE|Dir=Out|RA42=IntErnet|RA62=IntErnet|App=C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\PlacesServer.exe|Name=Block Cortana PlacesServer.exe|Desc=Block Cortana Outbound UDP/TCP Traffic|" /f >nul 2>&1reg add "HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules" /v "Block Cortana RemindersServer.exe" /t REG_SZ /d "v2.26|Action=Block|Active=TRUE|Dir=Out|RA42=IntErnet|RA62=IntErnet|App=C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\RemindersServer.exe|Name=Block Cortana RemindersServer.exe|Desc=Block Cortana Outbound UDP/TCP Traffic|" /f >nul 2>&1reg add "HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules" /v "Block Cortana RemindersShareTargetApp.exe" /t REG_SZ /d "v2.26|Action=Block|Active=TRUE|Dir=Out|RA42=IntErnet|RA62=IntErnet|App=C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\RemindersShareTargetApp.exe|Name=Block Cortana RemindersShareTargetApp.exe|Desc=Block Cortana Outbound UDP/TCP Traffic|" /f >nul 2>&1reg add "HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules" /v "Block Cortana SearchUI.exe" /t REG_SZ /d "v2.26|Action=Block|Active=TRUE|Dir=Out|RA42=IntErnet|RA62=IntErnet|App=C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe|Name=Block Cortana SearchUI.exe|Desc=Block Cortana Outbound UDP/TCP Traffic|" /f >nul 2>&1reg add "HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules" /v "Block Cortana Package" /t REG_SZ /d "v2.26|Action=Block|Active=TRUE|Dir=Out|RA42=IntErnet|RA62=IntErnet|Name=Block Cortana Package|Desc=Block Cortana Outbound UDP/TCP Traffic|AppPkgId=S-1-15-2-1861897761-1695161497-2927542615-642690995-327840285-2659745135-2630312742|Platform=2:6:2|Platform2=GTEQ|" /f >nul 2>&1reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Search" /v "SearchboxTaskbarMode" /t REG_DWORD /d "1" /f >nul 2>&1

  • Restart your pc to make changes. You will see a search icon instead of cortana in taskbar.
disable cortana in windows 10
  • Ok Done. Cortana successfully disabled.
  • Don't be scared of cortana in taskbar(Picture below).
disable cortana in windows 10

  • I have discussed Cortana tightly deployed with windows search. Cortana(2) task running windows search not virtual assistant Cortana.
  • ! Enjoy

Friday, July 13, 2018

How to format write protected pendrive/usb flash drive

Format write protected pendrive/usb flash drive

Write protection secure your disk security to read only mode. prevent disk from changes any content in the disk. Such as modify/delete or change any files stored in write protected disk.

If you faced with this problem, you are in the right place to get solution.
“The operation did not complete because the media is write protected”
“The disk is write protected”
“Windows was unable to complete this format”
“The file or directory is corrupted and unreadable”
“You are unable to add, delete, copy or save anything in your SD card”
“Read or Write error on SD card' that indicates it cannot read from the device”
Bear in mind that, there is no guarantee that these tricks will work for you

Follow these methods to solve your problem.

Method 1: “Physical Lock”

Check your SD card/hdd/pendrive if any physical write protection button/switch exist or not.
If it turned on. Turn off switch to remove write protection.

If this is not for you then try 2nd method---

Method 2: “Using regedit.exe”

  • Press windows + R key simultaneously to open run dialogue box.
  • Write down “regedit’ and press ok button to run registry editor.

  • In registry editor find the path/destination


  • In the right panel double click the “WriteProtect” and set hexadecimal value to 0

  • Close registry editor.
If you can’t find the key “StorageDevicePolicies”
Follow this:

  • Create a new sub key with name “StorageDevicePolicies” under control key.

  • In the right panel of “StorageDevicePolicies” create a DWORD(32-bit) value {if your system is 32 bit} or DWORD(64-bit) value {if your system is 64 bit} with name “WriteProtect

  • Double click the write protect and set hexadecimal value to 0

  • Close registry editor.
  • Eject your external drive/hdd/mmc/sd card.
  • Restart your computer in safe mode.
  • Place your usb/removable media device and format it with exFAT file system. Your write protection will be removed.

If this is not for you then try next method---

Method 3: “Command Line (Diskpart Utility)”

  • Press windows + R key simultaneously to open run dialogue box.
  • Write down “cmd” and press ok button to run command prompt.
  • In Command Line use command from below without quotes.

Ø  Type “diskpart” and press enter. (Diskpart session will start)
Ø  Type “list disk” and press enter. (All your disk will be listed with serial number).
Ø  Type “select disk n” and press enter. (Replace n with your disk number).
Ø  Type “clean” and press enter. (This command will erase your selected disk).
Ø  Type “create partition primary” and press enter.
Ø  Type “active” and press enter.
Ø  Type “select partition 1” and press enter.
Ø  Type “format fs=ntfs” and press enter. (You can quick format by “format fs=ntfs quick” this command), This will format your disk and remove write protection.

If this is not for you then try next method---

Method 4: “Third party Utility Software”

If you failed with method 1 to method3 your device has corrupted or contain bad sector.
You may try some partition tool to check and repair the possible errors.

A Video Guideline about format write protected mmc/pendrive/flashdrive

Finally: If method1 to method4 don't work for you bear in mind that your disk is physically damaged. If disk sectors are physically damaged, you won't repair this disk.
Good Luck.

Wednesday, April 11, 2018

How to use On Screen Keyboard in Windows 10

On screen keyboard in windows10

Suppose you are doing an important job. In this situation, your keyboard suddenly got lost. But the job is so important that you have to do it right now. What will you do at this moment? It is almost time we have to face such problems. In today's post I will teach you a tremendous tricks to do keyboard work in this emergency without the keyboard.

Most of us are using Windows as an operating system on most computers. But many of us do not know that there is a special advantage on the Windows operating system to do keyboard work without any keyboard. And There is no need to use any additional software to use this facility.

Learn about Laser Security System. Read this article.

With this post I will show you how to do all the keyboard work easily using the on-screen keyboard without the real keyboard. Let's follow the procedure below. I have also provided a video tutorial below.

[Note: Here I am showing the process for windows 10. But you can also use On Screen Keyboard in Windows 7]

Step-1: At First Click on Start Menu in Windows and Go to Settings

how to use on screen keyboard

Step-2: Now click on Ease of Access option from Setting Menu.

windows 10 onscreen keyboard

Step-3: A new window will open. Now click on Keyboard option from the left side.

how to use keybaord without a real keyboard

Step-4: Below the On Screen Keyboard turn on the option. If you turn on this option a Virtual Keyboard will show in your window.

how to open on screen keyboard

Windows on screen keyboard

Now where you want to write something just put your cursor there and click on the button of your virtual keyboard. You will see that the keyboard is working like as a real keyboard. You can do almost all things which you can do with your real Keyboard. You can also watch this video tutorial.

I hope you like this tutorial. If you have any question about this article than feel free to ask me. Please share this post with your friends. No more Today. Good Bye.

Saturday, April 7, 2018

What is OTG? 15 Smart and Mind Blowing use of OTG

Many of us know about OTG, but also many do not know. But for those who still do not know about OTG, this post is for them. So let's know details about OTG.

In today's post, you can find out about:
What is OTG?
How to use OTG?
What you can do using OTG?

The full meaning of OTG is "USB On The Go". This allows USB devices to be connected to other USB devices as hosts. USB on the go or OTG means that you can your OTG supported device as a USB host and connect several USB devices with it. You can do a lot of things by connecting two OTG supported devices with one another. As like we use our PC (Personal Computer) as a USB host and connect to various flash drives (e.g. hard disk, pen drive, card reader, modem etc). Similarly, you can connect to different Flash Drives through OTG on Android phones.

The number of OTG-supported Android devices is currently on the rise. As a result, a lot of work is done without the PC (Personal Computer). For example, because of OTG support, you can easily print your camera pictures without a PC by using only a Android phone. Besides this pendrive, harddisk, keybord, mouse, and other USB sticks are can easily use with Android smartphone. Since this OTG has a lot of benefits, so when purchasing the phone, you should make sure that the device is OTG supported.

How to understand if your phone is OTG supported?

At present, almost all new smartphones have the facility of OTG. If you do not know whether your phone has OTG facility in this case, you can check the box of your phone which you have got with your phone when your purchased it. You can also check the manual of your phone which was provided inside the mobile box during purchase.  If you do not have a phone box, then you can search your phone model on google and know whether your phone supports OTG. You can collect the otg compatible smartphones list from google. There is an another way. You can also easily download the 'USB OTG Checker' app from the Play Store and find out if your phone has OTG facility. If your phone is OTG enabled, you will need an OTG Cable to get the utility benefits of OTG. You can buy it from any mobile store at a very small price.

Now let's know, about the wonderful things you can do with your phone's OTG facility.

1. You can charge your Android by connecting with another OTG supported phone

charging a phone with another phone

This is a strategy that Android users would like to use because it allows you to charge a smartphone using another. The OTG supported phone will work as a host which automatically charges another device. It may be a helpful strategy to charge your phone for urgent need.
2. Connect the portable hard drive
otg portable hard drive

You can connect portable hard drives or external storage device with your Smartphone via an OTG cable. For this you only need to connect your smartphone and an external storage with OTG cable. With this you can easily access external storage devices. Also you can transfer files from phone to external storage or vice-versa by the help of OTG cable.
3. Connect a game controller

otg game controller

If you think that playing Fast Person Shooting Game on Android devices is very annoying then you can try connecting a game controller with your Android device via OTG cable. Nowadays many Android games support external gamepad, and you can easily connect an external game controller to your device using an OTG cable.
4. Connect the USB lights

otg USB lights

Have you ever imagined that your phone can light an LED lamp? Of course not, you will say! You can attach USB based LED lights to your Android phone using OTG cable. If you do not have a flash feature on your phone, you can use LED lights to take pictures at night.
5. Connect a LAN cable
otg lan cable

You just have to buy a LAN to USB controller and connect it to your Android device, As shown in the image above. With this help you can enjoy broadband internet access directly on your mobile.
6. Share numbers and messages between two phones

With the help of Samsung's SmartSwitch application, you can transfer messages, call logs, numbers and also more with the help of OTG cable on your Android device. It is very useful and costs less battery.
7. Connect keyboard and mouse
otg keyboard and mouse

If you do not want to navigate your Android device! If you use lots of messaging apps like WhatsApp and Facebook, you must choose to type messages with keyboards and mouse. You can connect your USB mouse and keyboard using OTG cables on your Android device and can use smoothly with your smartphone.
8.  Connect your Camera

otg cable camera

If you like photography than you must want to use a Camera. After capturing photo you need to connect your camera with a computer to review the captured image. But now you can do the same task in your Android phone just by connecting your camera via OTG cable. You can also delete image from your mobile by using this feature.
9. Directly print any document from Android phone

usb otg printer with android

You can use the PrintShare application, Android automatically downloads drivers for USB printers on your Android smartphone. To print a document directly, simply connect your printer to the Android device with the help of OTG cable.
10. Connect a USB fan

otg usb fan

USB fan works with the help of electric charge. However, you've probably seen that the laptop cooling pad is usually connected with USB. You can connect a USB fan to your Android device using OTG cable.
11. Make music at Android

OTG Music keyboard

Almost all modern musical instruments like the keyboard, gitar can be connected to the PC through the MIDI standard. In this case, with USB OTG, you can connect all the devices with your Android devices. So that you can easily make your own music in your Smartphone.
12. Connect Ethernet

You know, you can use strange Internet that is commonly known as Ethernet, with the help of OTG cable on your Android device. If you are not getting access to WiFi or cellular data, then the ethernet connection is considered to be very useful with the help of OTG cable.
13. Record Audio with external microphone

otg external microphone

It is quite useful for YouTube users. You can use an external microphone to record your voice in your Android phone. It is possible to record voice using an external microphone connected with android using OTG cable.
14.  Connect Card Reader

otg card reader

If you are using an Android smartphone which does not support MicroSD card, don't worry. With the help of OTG cable you can attach card reader to your phone. You only need an OTG cable and card reader. It will help the user to connect the microSD card with any Android device.
15. Use your android in Smart TV

With the help of OTG cable, you can mirror your Android screen on your home TV. For this, the user will only need a HDMI cable  and OTG cable to connect the Android phone with a TV. You can watch movie in large screen from your Android phone by using this system.
In today's post, we tried to tell you about some unknown use of otg cable. Hope you like the post. If you also know some other strange use of otg cable, please let us know in the comment. Do not forget to let us know your comments or suggestions regarding today's post. In the next phase, we will try to learn new things. Good Bye.

Sunday, January 21, 2018

What is Arduino? A Complete Introduction to Getting Started With Arduino and Arduino Programming

Do you want to make a robot or something interesting electronics project? Then you must should use Arduino. Even your engineering teacher maybe told you to learn arduino. But you don’t know what is arduino? Or, what can we do using Arduino? Ok, If you have this question in your brain than I think you are at the right place. In this article I shall introduce you with Arduino and it’s use. Let’s consider your first question.

What is Arduino?

Arduino is mainly a hardware and software company who manufactured computer programmable microcontroller board and related software. Arduino is a open source platform. That means all the resource files and software is open to everybody and anybody can develop this board and software to make it more useful.
If we want to know more about arduino at first we need to know about microcontroller.

What is Microcontroller?

Microcontroller is a single chip microcomputer. It looks like a Integrated Circuit (IC). We can control any electronics device by a microcontroller using computer programme. Microcontroller is called as a mini computer. Why we call it as a micro computer? Because Microcontroller has the same characteristics of a desktop computer.


·        Computer has RAM and ROM. Microcontroller also has both RAM and ROM.
·        Computer runs based on a programme which is loaded in this computer. Microcontroller also needs a programme to run and execute command.
·        Computer has input-output pin. Microcontroller also has digital input-output pin. Basically this input output pin is used to control led, motor, buzzer, display and reading value from different sensor.
I think you have understood about microcontroller. Now come back to our main topics about Arduino. Arduino provides different kinds of microcontroller based hardware board. The arduino board is normally consists of a microcontroller, some useable input-output pin, a regulated power circuit. Arduino board has a built in programmer to burn the computer programme in the microcontroller. So, Arduino board don’t need extra hardware to burn computer programme in microcontroller.

What can we do using Arduino?

If you have already understand what is arduino than I think your next question is what can we do using arduino? Ok, good question. I think you should ask what cann’t we do using arduino? Surprising question. But it should be the right answer. Because, you can develop any kind of electronics project using this tiny arduino board. Arduino is developing day by day. Different kind of sensor is now working with arduino because the developer always works to make it more popular. From a simple Digital Thermometer to a complex robot you can make using arduino. But here I am giving a short note about some most popular arduino projects list which can be built by Arduino. 

  • Digital Thermometer
  • Digital Weather Station
  • Laser Security System
  • Smart Voting Machine
  • Different kind of Robots
  • CNC Machine
  • Smart Security System
  • Remote Controlling
  • Drone

Arduino is now very popular in building Artificial Intelligence Robot. Here I have included only some project name. But in real life you can make different kind of project using Arduino.

How can we get started with Arduino?

Ok, I think you already fall in love of Arduino. Now in this section I will tell you how to get started with arduino. At first you need to collect a Arduino Board. There are different kinds of Arduino boards available in market. But as beginner I always prefer to use Arduino Uno R3 board. It is perfect for starting. Arduino Uno R3 has 14 Digital Input Output Pin, 6 Analog Input Pin, 7 pwm supported pin in digital input output pin. Arduino also has RX and TX Pin which can make serial communication with any device. Besides this we also need some additional device to make project. For this, best practices is to buy a Arduino Starter Kit. This kit contains all important components to start our journey of Arduino. I have also collected this Arduino Starter Kit. In my serial Tutorial I will use this Starter Kit. Collect your own kit before starting Arduino Journey.
arduino uno r3

How can we learn Arduino?

Ok, after collecting all needed components now it’s time to learn arduino practically. In my site I will serially share tutorial which will be very helpful for those who don’t know anything about arduino. Basically we need to learn C Programming to programme our microcontroller in Arduino. If you don’t know c programming don’t worry. I am here, to help you to learn Arduino Programming. I will also provide project making tutorial. After watching this tutorial you will be able to make your own arduino project at your home.
Ok friends, in this article I have basically tried to give your answer about What is Arduino? I think you have understand that what is arduino. Now, if you are interested to learn arduino than stay with me. In my website I will provide Arduino Tutorial with video. If you watch this video you will learn Arduino Programming and will be Arduino Projects Master.

No more today. If you have any question about what is arduino or something else, feel free to ask me. I shall try my best to provide you the right answer. See you again in my next post. Till than stay safe.

Monday, January 1, 2018

How to Make Arduino Laser Security System at Home using Arduino and LDR

how to make laser security system
Do you know about Arduino Laser Security System? If you don't know anything, don't worry. Because today i will present a complete package of information about arduino laser security system.

We all want to live safely. So we always try to take necessary steps to keep it safe. Now a days there are a lot of electronic gadget can be found in market to increase the security of our home and office. Some of them is like CC TV Camera, Anti Theft Alarm, Smart Door locking system etc. But today i will show you how to make a powerful Laser Security System very easily.

Our laser security system is designed in microcontroller based platform. Because microcontroller now brings a modern era to develop electronics project using a few component. Also we can develop this project and can collect data for future analysis. Here i have used Arduino Uno R3 for this process. Arduino is now a popular microcontroller platform in the world. If you have a basic abc knowledge on programming you can make different types interesting project using this board. One of the best example of this is our arduino laser security system.

arduino uno r3

How Laser Security System work?

At first Let's know how this project work. Basically in this project we are using a special kind of light which is known as laser light. Laser is a alphabetical name. The abbreviation of LASER is Light Amplified by Stimulated of Radiation. It means Laser is the enlargement of light. But laser is not as normal light. It is a monochrome light. The light is Sharp and Thick. The laser light waves are same size. The most important feature of this light is that these lights do not spread on the way as like as normal light. This ray can be go too far as it is highly concentrated and one-way.

Using this special power of laser rays, we will basically create our arduino laser security system. Many of you have heard about Dark Sensor. For those who did not listen, there is a photo diode in this dark sensor circuit called LDR (Light Depending Resistor). It works like a normal conductor when it lamps up on LDR. Again if there is darkness then electricity is prevented to flow. Using this feature of LDR, we will create our project.

Some of you have already got the idea about the project. But there is no reason to fear those who are still unable to understand. I'm gonna give up. We will create a circuit using LDR which will sound when it is dark. Now we will set the target of laser dot on the LDR from a distance. So the laser light will fall on LDR. In this situation the circuit will not give any sound signal. But whenever anybody wants to cross the space between the laser light and the LDR, the laser ray will be interrupted to fall on the LDR. As a result, due to the absence of light, the circuit will give sound signal. I think now the idea is totally clear to all. Ok, let's learn how to make a laser security system.

Arduino Laser Security System

For making this system we will use the following components:
  • Arduino Uno R3
  • A Laser Light
  • A LDR
  • A Buzzer
  • A 1KOhm Resistor
  • Some Jumper Wire
  • A Breadboard
  • A Battery
arduino breadboard
arduino jumper wire
ldr, buzzer, resistor

Here, i am using Arduino Uno R3 Board. Because Arduino is a micro controller board. It means we can easily modify this board as our wish using computer programming. It will be very helpful to make our laser security system project more easily using little components.

Procedure: Connect the all components as like the circuit diagram given below. Here, i have used a arduino microcontroller board. You can collect this board from any local shop. I have collected my arduino board from Amazon. You can collect all other components from here.

laser security system

The connection of this circuit is very easy. At first i have connect the one leg of ldr with Vcc. Here Vcc means 5v. We know that ldr has no polarity. So you can connect any terminal of the ldr. Now connect the other leg of ldr with the 1 resistor. And the other leg of resistor will be connected with the GND. Now the connection point of ldr and resistor will be connected with the A0 pin of Arduino. Now we also need to connect a buzzer with arduino for making alarm. Connect the positive terminal of the buzzer with pin 12 of Arduino. And the other pin of Buzzer connect with GND. Now connect a battery with this circuit. Add another battery with the laser light. Our Arduino Based Laser Security System circuit is now ready. Now it's time to upload the code in Arduino to configure it. The code is very simple. Follow my video tutorial. Here, i have showed the full process of making circuit and explained the code.

Coding: Here i have used two code in my laser security system using Arduino. The first code is for calibration. In this code i have used the analogRead() function to read the value from Ldr. The analogRead() givea a value which range is 0 to 1024. I have used this code to understand what is the value when the laser is targeted on the ldr and what is the value when the laser light is not targeted or failed to fall on the ldr. This two values help me to make a condition for alarming the buzzer. Suppose the when the laser light is focused on the ldr the output value from analogRead() is 600 and when the laser light is failed to focus then the output value of analogRead() is 200. Now we can easily make a condition that if the value is less than 400 it means that surely someone are crossing the path between ldr and laser so that the light can not directly focus on ldr. So we should turn on our arduino laser security system alarm to notice that someone is crossing the area. Else the value is normally greater than 400 means there is no obstacle or human between the ldr and laser. So the alarm will turn off. In the second code i have used the value in my condition which i calibrated from first code. If you watch the tutorial it will be more clear to you.

Now it's time to use this circuit. For this turn your laser light on using battery and place it on the door frame. Place the LDR circuit on the other side of the door frame in such a way that the light from the laser light goes directly to the LDR. Now finish the job. The laser light will be interrupted if someone wants to enter the door. As a result, the Buzzer sound in the circuit will have to be sounded.

I hope everybody understand this project and will be able to make Laser Security System by Arduino. I also share the video tutorial. It will be very helpful to understand this project. If you have any question about this project feel free to ask me.

No more today. Stay safe and visit my blog everyday. Good Bye.