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From C to Assembly: Blinking an LED the Hard Way

  From C to Assembly: Blinking an LED the Hard Way ~4 hours of digging, one blinking LED, and a much better mental model of what "compiling" actually means. The Inspiration I've been programming since 2017 — variables, control flow, HTTP, web apps, the usual path. But I kept coming back to something Linus Torvalds said: that the compiler writes 100% of the code. I wanted to actually understand what that meant before taking it for granted. So I went looking for the layer beneath the code I usually write: binary → hexadecimal opcodes → assembly → C. I wanted to see the whole stack, not just use the top of it. What I Tried I already knew my way around the Arduino IDE for uploading compiled sketches. While researching, I found out you could write raw hex machine code directly for the Arduino — but the resources I found were too dense to follow. So I stepped back one level, to assembly. Searching further, I found a YouTube channel with an Arduino-assembly series. I copi...
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IVR or SMS based navigation for smart phone not education equipped people

Problem statement:    On Thursday morning (16-10-2025) i went for walking near Perungudi in chennai. There, i was saw a truck driver he notes the address and has some navigation landmarks. But, he hesitate to follow the navigation due to every day development of chennai. He asked me if you know this location. I said , i don't know but, you may follow the map. He said I have dial pad phone no map in it. So, I was traveled with the track to reach the place used by google map. Then , I realised many Indian old people causing this problem and some poor internet place also. Solution:    If some one know where they are or say some landmark through mobile like 198 (AI). It should say their location on voice call and if they want navigation to some places it should create session with say the navigation tips. It will recall them to ensure they are going correct path. Predictable problems:    1. Voice call or sms not encrypted it may tab by middle one to give wrong ...
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mobile toilets

Abstract:   I just faced struggle during attending interview in Chennai. I need 4 hrs sitting or stay place , toilet and bathroom for refreshing and take some breath. But, In Chennai if I want to take bath the hotel charging 500 rupees with one hour stay. Then, I thought why don't make it as a service business model. If some one need sitting for few hours able charge from 50 to 100 for non AC or AC can charge 100 to 200. And for bathing for 10 min is chargeable upto 100. If that toilet, bathroom and sitting place integrated in simple van it can move around wherever want . Description:    Newly comers or some one come for business for a day. Then, they need some refreshments place with sitting place. If offer you can book a van . If that van has vacancy people move to the near van. If more people booked from single place van will move viable distance for them. Predictable problems: 1. Illegal activity may happen (smuggling like) 2. Abuse may happen. 3. Cleaning and moving ...
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PHP can run AI models - no need Python

 Objective:     Run AI models only using php. Now this is possible with  https://github.com/CodeWithKyrian/transformers-php  this library. I have tried object detection and question answering using this library. Technology:       1.  PHP 8.2 Initialization:     Guide -  https://transformers.codewithkyrian.com/getting-started 1. Initialize project by composer init cmd. 2. Install transformer library by  composer require codewithkyrian/transformers cmd. 3. Enable ffi extention in php.ini       extension = ffi      ffi.enable = true 4. Enable opcache      opcache.jit = tracing 5. Increase memory limit      memory_limit = 512M I. Object detection: ( https://transformers.codewithkyrian.com/object-detection )     Object detection can improve web application perspective . Example:  Retail applications can speed up checkout by automatically recognizing ...
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Don't assign value to reference variable.

Objective:          I just tried to create linked list in php.  Challenges:     In php array is sufficient for most data types (simple array, multi-dimensional array and key-value associative array). But, i just tried using  stdClass Object ( pre-defined interfaces and class ). Here, I created one stdClass with reference key and it reference to another class up to final and that final class  reference key is null. Here I used reference key as reference variable. Once i started assigning reference value to this key it assigning new value to it and old one erased. $a = new stdClass(); $a->name = "Trial"; $a->ref = null; for($i=1;$i <= 10;$i++){  $b = new stdClass();  $b->name = 'Demo mj '.$i;  $b->ref = null;  if($a->ref === null ){   $a->ref = &$b;  }else{   $current = $a->ref;   wh...
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PHP array_shift not preserve key

 Objective:     When i want to remove first element from array and preserve key it happened. That is array shift only return key or change the key value of php array. Technolog:     php-8.2 Challenge:     Here, Changed that array keys. Solution:   `array_slice()` used to preserve that array key. syntax:      array_slice(array, starting position, length,  preserve_keys);
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bootstrap-popper not allowing html table

  Objective :       Creating popover with html using bootstrap-popover.js Technology:  Bootstrap version - 4.6.1 Popper - 1.16.1 Jquery - 3.5.1 Challenge:     1. basic syntax for popover <button type= "button" class= "btn btn-lg btn-success" data-toggle= "popover" title= "Popover title" data-content= "And here's some amazing content. It's very engaging. Right?" > Click to toggle popover </button>      $ ( function () {           $ ( '[data-toggle="popover"]' ). popover ();      });    2. Put html to that popover syntax <button type= "button" class= "btn btn-lg btn-success" data-toggle= "popover" title= "Popover title" data-content= "And here's some amazing content. It's very engaging. Right?" > Click to toggle popover </button>      $(function () { $('button[data-toggle="popover"]').popover(...
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