Photo by : Subhankar Karmakar
Theme : Technology - Opening a phone and taking external power supply to know how every small component works
Sunday, May 17, 2020
Saturday, May 16, 2020
Photo by : Subhankar Karmakar
Theme : Technology - Taking Closeup pictures of pixels of the display using a manual focus web cam
Thursday, May 14, 2020
Photo by : Subhankar Karmakar
Theme : Technology - Opening a phone and taking external power supply to know how every small component works
Tuesday, May 12, 2020
Photo by : Subhankar Karmakar
Theme : Technology - Opening a phone and taking external power supply to know how every small component works
Photo by : Subhankar Karmakar
Theme : Technology - Opening a phone and taking external power supply to know how every small component works
Tuesday, May 5, 2020
In 1982 the fruits of a partnership between Sony and Philips were released to the music-loving public the compact disk or CD was unveiled as the first consumer digital audio format.
These 12 centimeter discs could store up to 74 minutes of perfect quality digital audio and as was famously demonstrated many times over, which're immune from liquid damage could withstand significant scratching and could be played without wearing them down for a theoretically infinite number of times.
That's because unlike all previous sound, That's where the sound is encoded as an analog impression of the sound wave on plastic discs or Magnetic Tape the sound on a CD is encoded as a series of samples which function as a set of instructions on how to recreate the sound.
The compact disc was a big freaking deal in many ways. It represented a giant leap inconvenience for the consumer quality of the recorded sound and in raw data storage capacity that last bit wouldn't be too relevant to the Computing industry for some time, but it's solved the Central problem of digital sound needing time for absurdly massive amount of raw Data,
before we get too far into the specifics of the compact disc. It's time to dig a little deeper into how digital sound actually works for call . That an analog to digital converter is taken instantaneous samples of the analog signal at a specific sampling frequency. Then a digital to analog converter can recreate the original analog signal with only those samples. Well, a lot of people thought that this can't possibly work.
I have used photos from my mobile and some old junk hard disk controller PCBs and other junk PCBs, anyways I have designed one but have not got it manufactured, and for softwares I have used KiCAD – it is free software and you can get it and run it easily and also I have used images from Altium designer software( it is not free ) & Autodesk EAGLE. There is this prominent software which is completely online and is linked with an assembler called the EasyEDA and you can try it too ! Also for KiCAD example and many demo files we have many repositories on internet from OSH-park and other open source hardware companies which give out free complex PCB design files.
In future posts I will try to make a comparison between this PCB manufacturing and IC fabrication !
Monday, May 4, 2020
Now that we have designed our PCB we just now have to get the design files exported and get a almost standard output file that a manufacturer will understand and will translate them into good looking PCB. So well there are export options in design softwares which can export the PCB design file in a format called GERBER format and NCDRILL files which then can be submitted online and an order can be placed at PCB manufacturing web sites.
Now during placing orders also we have a lot of options to choose and one of them is solder mask colour and silk screen colour, now what these two are they are just as we see them, the solder mask colour is the colour of the PCB that is we see green coloured PCB, blue coloured PCB and the markings on them or writings on them are mostly done using white and they are called silk screen colour, the most prominent and most widely seen PCB are green coloured PCB with white text written on them and manufacturing them also cost less.
Later after the PCB gets manufactured and you get in your home then the placing of components will come and the use of solder mask will be prominent as it helps you exposing the contact pads and helps you solder properly without sorting the existing copper contacts and tracks.
The silk screen tells us where to place the components.
Also there is auto assembly offered by many PCB manufacturers and we can pay them so that they buy our components and assemble them using pick and place machines, more about them later !
