sábado, 21 de septiembre de 2019

Digital integrated circuits 74 series

On the link you will find a bible of digital intergrated circuits.

https://en.wikichip.org/wiki/7400_series


obtener los enlaces de la página donde estamos

Navegando en Chrome, nos puede interesar obtener todos los enlaces de una pàgina Web.
  1. botón derecho del mouse o  Ctrl+Mayúscula+I
  2. Inspecciona
  3. Console

allí pegamos:
urls=$$('a');for (url in urls) console.log (urls[url].href);

en EXCEL nos quedamos sólo con los enlaces.
y luego, para crear links concatenamos celdas de forma que nos quedarà algo como:

si añadimos al código html br

hará un salto de línea


martes, 10 de septiembre de 2019

Check Your Computer's Performance

Check Your Computer's Performance

in order to get the computer's performance, we will proceed through the cmd (command prompt on the OS/2 and Windows NT families )

Press the windows key 

and then write cmd. Press INTRO (on next steps I will miss INTRO as you know it is the way to Execute the command)

Then write the command systeminfo

You will see the screen in black as old-computer-fashion (MS-DOS).



Label of a UMTS router with MAC addresses for LAN and WLAN modules
On Wiki you will find what's MAC address:
media access control address (MAC address) of a device is a unique identifier assigned to a network interface controller (NIC). For communications within a network segment, it is used as a network address for most IEEE 802 network technologies, including EthernetWi-Fi, and Bluetooth. Within the Open Systems Interconnection (OSI) model, MAC addresses are used in the medium access control protocol sublayer of the data link layer. As typically represented, MAC addresses are recognizable as six groups of two hexadecimal digits, separated by hyphens, colons, or no separator (see Notational conventions below). 

In cmd you will get the MAC nr through command getmac

Check the data and fulfill the spread-sheet.


Test the processor (speed) through a C++ program

the program attached below shows the 100 prime numbers. This calculation could be a mean for checking the processor speed to operate:

Write the next program (source) and run it on c++ compiler installed in your computer:

#include
#include
using namespace std;

int main()
{
clock_t start, end;

start = clock();

    for (int i=2; i<100 b="" i="" nbsp="">
    {
        bool prime=true;
        for (int j=2; j*j<=i; j++)
        {
            if (i % j == 0) 
            {
                prime=false;
                break;    
            }
        }   
        if(prime) cout << i << " ";
    }


end = clock();

cout << "\n\nTime required for execution: "
<< (double)(end-start)/CLOCKS_PER_SEC
<< " seconds." << "\n\n";
return 0;
}

In case that your computer doesn't have installed C++ compiler, you can proceed through a online compiler (be awared results will be submitted to network speed, anyway you will be able to compare the results between). 

Get time values for 100, 2000, 4000, 8000, 16000 prime numbers and write them on the Form.

Copy to clipboard 

Copy to NOTEPAD (you can execute the same as CMD)
Save the file with you FirstSurname_Name
Send the file to your Drive. Attach the link to the file into the Form