FAIL AND LEARN

                 LM386 DIP-package   The LM386 is a dip package OP_AMP specialized for low power audio amplifications still using in these day. there are different types of LM386 versions I'm using LM386 N-4...depending upon the variation the input voltage can vary... for my chip its "min=4V" to "max=18V"    , it has nearly power gain of 1W and 1W may not sound enough but it's enough for a mono audio output speaker. Here are some best youtube videos on op amp by various youtubers .  best project videos on op amps . [Note: before you go make this circuit i recommend powering it with some 9V or 6V battery of walladapter less than 5W or so.] the below circuit is by   AFROTECHMODS  a nice video on building a 1w mono amplifer circuit  using a lm386.  i'm using the circuit in datasheet with gain of A = 200.      The Vin is audio source like a mp3 files container like phone or pc. The it ...

In this post we're gonna learn about "pyserial"  python language library package to communicate or log data from arduino to pc (or) we can get rid of the serial port of arduino.H ence we do the same as we do in serial monitor. the module can be installed using pip   for linux: " sudo python -m pip install pyserial"   for windows : " pip install pyserial" here is a small arduino skecth for reading from terminal or cmd from arduino serial port code: import serial as sl #importing the serial lib as name sl import time mon = '/dev/ttyACM0' #declearing a variable for port name baud = 9600 #defining baud rate arduino = serial . Serial(mon, baud, timeout =. 1 ) while True : mon = arduino . readline() print ( 'the read data:,mon' ) #printing message for reading data from serial here is the python file for data loging code: import serial arduino_port = "/dev/ttyACM0" #serial port of Arduino ba...

 The "reactance👊" is a fancy way of saying the word "Resistance✊" for an inductor or capacitor. well we denote the symbol "X" instead of  "R" . The capacitor acts as a frequency dependent resistor in here, well the reactance of the capacitor(Xc) increases with decreasing of frequency. In math we call it as inverse relation(Xc ∝ 1/F). here in this figure we can see that "Xc"(reactance of capacitor) decreased with increasing "F". so the Xc can be expressed as  The Inductor acts as a frequency dependent resistor in here well the reactance of the inductor(X L ) increases with Increasing of frequency. in math we call it as proportional relation(X L  ∝ F). here in this figure we can see that "X L "(reactance of inductor) decreased with decreasing "F". Or increase as increase in frequency. so the X L can be expressed as

The one way to get started with  the object oriented programming in python is to get started with the " creating a class object and using it". things u need to get started: 1. Latest version of python3  u can get that from here  2. An ide or u can use python default ide which it comes with! that's all u need to get started. here we are gonna make code for math function called standard scaler(for scaling data). you make one for anything u want I'm just a math guy!!  so the math formula for standard scaler is : hence we start with a class object called Scale , the class object doesn't need any input variable for it's name we do it in functions inside of it. The first function inside of class object should be a __init__() " function it must be..! next, an __init__() function should always starts with a " self " variable and other as   follows  by as other variables u may like... class Scale:         def _init_ ( self , data ): ...

The machine learning  is all about making computer or a machine like Robot! to do stuff without actually telling every single thing via programming...here the computer or a machine just learns how to do the stuff.., it'll figure it out like you and me. how it does that?...well that's math!! for you...yes, literally it figure it out using mathematics. What kind of it??? well for starters if you ever had any math class in your university or school...that'll do!  Ok that being said we gonna learn little bit of ML(machine learning). especially the one called supervised learning. Supervised Learning : is a kind of method telling the computer what to do whether than how to do..in technical term we call it as specifying "LABELS" for prediction... Say we have a data on a phone parts like camera, storage, ram, 5G or 4G, brand (apple, Samsung, etc..) and their prices. we need to predict the price of a new phone based on specs from our previous data on specs and brand. her...

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 ...

                              In this method we are using opencv and python for identifying a color and hilight it. this method uses the simple Bitwise and operation and image "HSV(hue,saturation,value)" manupulation of colors.                      The HSV value of image is represent the original colors of image though the RGB or BGR cannot tell the difference between the levels of colors hence this method only to work with HSV images since the HUE tells the color and saturation tells the level of color.                       here i'm tracking blue levels of colors in HSV u can track any color u want you need the hsv value for that, i suggest to use max value of upper color and min value for lower colorat start and play around the values untill u get statisfied results or jus...