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Showing posts from July, 2017

Keys to a Successful Engineering Career LESSON 2: What High School Stude...

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- July 11, 2017

Keys to a Successful Engineering Career LESSON 2: What High School Stude...

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- July 11, 2017

GOD vs NO GOD - And the Winner Is?

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- July 10, 2017

Can we create new senses for humans? | David Eagleman

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- July 10, 2017

What if 3D printing was 100x faster? | Joseph DeSimone

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- July 10, 2017

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HARIHARAN: just a fellow Engineer sharing what i know

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popular posts

HACK AND CLONE CAR KEY FOB, MY EPIC FAILURE...!!

- March 05, 2022

In this blog post i'm sharing my experience on cloning the my car key fob signal and how to do it properly. first things frist the cars now a days comes with a wireless remote key where u get atleast 2 or 3 options like lock,unlocking ,trunk(we call it as dickey!!!).....these options let your car access wirelessly and some cars are completly keyless for even driving. the keys of the cars are actually communicating with certain frequency like 433.xxxMHz or some countries uses 315.xxxMHz...the car companies uses an algorithm called " ROLLING CODES "...these are not that esay to crack cause they change every time u press key and once the key transmitted it cannot be used again... but a hacker named "samy kamakar" demonstrated an attack called REPLAY ATTACK where u simply transmitt the signal by recording the key fob away from car or blocking the signal and then recording. so this is how i've tried it..frist i needed to listen to the signals as possible in 10KHz...

HACK HC-05(BLUETOOTH MODULE) FRIMWARE INTO HID FRIMWARE

This post helps you to change the firmware of the hc05 Bluetooth chip into hid enabled Bluetooth chip. The HID stands for “HUMAN INTERFACE DEVICES” means things like your keyboard, mouse, printer, joysticks, etc.. Drivers get automatically installed in your computer without any external drivers needed. The hc05 default don’t have hid capability but, the chip hc05 uses is same clone of chip RN-42 uses (BC417) , the RN-42 is an HID enabled chip. We gonna swap the firmware’s of rn42 into hc05. [NOTE: this particular hc05 chip comes with serial interface in it if you perform this swap it no longer work as serial Bluetooth chip. If you want you can save the firmware of hc05 and re-swap again to work normal]. That being said what are the things we need to perform this task are: 1. HC05 module for sure (duh!) 2. RN-42 chip {Wait if you are performing this task you must be very enthusiastic in electronics or extremely poor then why the hell you gonna buy an r...

"Kernel Panic” error After upgrading Parrot OS

- December 03, 2023

This guide will walk you through the steps of resolving the kernel panic error that you may encounter after upgrading your Parrot OS kernel to version 5.6.0. Step 1: Enter Recovery Mode Restart your computer and enter the GRUB menu by pressing the appropriate key during the boot process. The specific key may vary depending on your computer's manufacturer and BIOS settings. Common keys include F2, F10, Delete, or Esc. Once in the GRUB menu, select "Advanced Mode" using the arrow keys and press Enter. In the Advanced Mode menu, locate the entry for Parrot OS 6.1 and select "Recovery Mode" using the arrow keys. Press Enter to boot into Recovery Mode. Step 2: Purge Problematic Packages Once in Recovery Mode, log in as root using the default credentials. Open a terminal window by selecting "Drop to root shell prompt" from the Recovery Mode menu. ...

secrets of arduino atmega328p adc

- March 23, 2022

In this tutorials i'm gonna tell you all about the adc present in arduino famous boards like UNO,NANO,MINI....the atmega328p chips consist of the " 10-bit resolution adc " inside the uC. The type of adc is used in is Successive approximation ADC . these are kind are slow but gives good resolution though. let's dig in registers of adc in atmega328p. To read analog input we need The reg " ADMUX ". T he adc reg have a Pin called AREF (adc reference voltage). The gives 10-bit number i.e 0-1023, 0-0V & 1023-5V. it measures using this formula Vin = (Analog Ref * analogRead() ) / 1024 we need stable AREF voltage we can use internal 1.1V reference or we need to provide a stable voltage anywhere between 0.3V-5V externally. [NOTE: if ur are planning to provide external voltage to aref pin present on arduino uno,nano,mini, the recommended value is less than 5v to be safe on safe side cause the voltage of external 5v source may not be 5v exactly so if it i...

1 Best way to add members to Telegram group(2021 using python)

This post for those who want to add members to thier telegram group, which could take forever if we do manually, hence we can automate this take. I 'm using python for this automation. Using the python script called telethon we can add members to the group. T he daliy limit is 200 members. The script adds members with 60-180 sec intervals to avoid bans. you need the following installed in your computer : 1.python 3 (recent one would be better) 2.pip install of python installed(we can enable this option while install python choosing custom install) 3.telethon package installed using pip installer. 4.telegram group api registered in the telegram website. 5.good internet(mandatory) 1.Install python 3 CODE : visit python.org for downloading and installing the windows pacakge. Note: 1.choose the custom installing to enable necessary installers in windows. 2.if you are on the linux or mac python is defaultly ins...

The Loss function/Cost Function

In this post we are gonna learn about the loss function in machine learning..The loss functions are essential in machine learning cause they are one who tells the algorithm if it makes mistake in prediction as wrong. so The Loss function/Cost Function are integral part of gradient descent and entropy calculations. Here we are gonna learn a bit about the different cost functions for different types of problems in machine learning. Mathematical Formula for Entropy : Consider a data set having a total number of N classes, then the entropy (E) can be determined with the formula below: Where: P i = Probability of randomly selecting an example in class I; Entropy always lies between 0 and 1, however depending on the number of classes in the dataset, it can be greater than 1. But the high value of Let's understand it with an example where we have a dataset having three colors of fruits as red, green, and yellow. Suppose we have 2 red, 2 green, and 4 yellow observations throughout the dat...

computer vision(opencv) with python

- August 18, 2021

face detection using HAAR'S CASCADE with python In this tutorial we're gonna look into a face detection using "HAAR's CASCADE" algorithm in open cv. haar's cascade a is face detection classifier built-in opencv for face and many more detection. Haar's cascade is originally developed from viola-jones algorithm. but it's not perfect it is prone to noise often, but for just simplicity we use it today. "using this method we can also detect many other features like face,eyes,full body,lowerbody,russian number_plates,etc.." here the same method modified for video face detection to get started u need few things, and just few line of codes you get ur face detection. we need the following things to get started: 1.python 3 recent would be nice! 2.opencv lib package installed using pip 3.laptop/desktop with webcam step 1: go to www.python.org and download latest version of python3 choose the install python along with pip and ...

video face detection using HAAR'S CASCADE with python

- September 10, 2021

face detection using HAAR'S CASCADE with python In this tutorial we're gonna look into a face detection using "HAAR's CASCADE" algorithm in open cv. haar's cascade a is face detection classifier built-in opencv for face and many more detection. Haar's cascade is originally developed from viola-jones algorithm . but it's not perfect it is prone to noise often, and this algorithm is best suited for frontal face detection, but for just simplicity we use it today. Let's be clear about 2 things they are face Recognization and face detection. They both are 2 separate things. This haars cascade focus and used for face detection means in picture or a video it can detect the faces. Where face recognization is detecting a particular face of person. The problem in computer vision has been bothered so long untill Development began on similar systems in the 1960s, here is wiki page on history of face detection . The viola jones algorithm achived the face ...

HOW TO WRITE YOUR OWN CODE FOR AN LCD DISPLAY (16X2 OR 16X4)

The Arduino ide default comes with an excellent library with examples for LCD display it’s really easy! One to use. Mine is not best one but the reason behind this post is to experience the feel of writing your own code and understanding the embedded displays and their working technology and how they works with u-controllers, maybe in future it can helps you to write a code for lcd display with other new microcontrollers or other programming languages. So let’s start with the one important things: The datasheet is your friend in this quest for any quest, for real! So getting the data sheet is important here I’m using a 16x2 LCD. This kind LCD is based on parallel interface LCD controller chip from Hitachi called the HD44780. Next is physical pinout the display uses a matrix of dots and displays only characters in 16x2 matrixes. Each character is displayed in a 5 column × 8 row dot matrix or a 5 column × 10 row dot matrix The pinout is LCD has totally 16 pins they are: 1....