Learn about electronics from A to Z, PC, Mobile, Tablet ....

Saturday, 16 February 2019

My own Soldering Protection tool.

My creation :)

So as you can see from the picture, I made a small protection tool for my soldering job from a broken Power supply. If you want to do this, make sure it's an ATX format because smaller PSU's don't work quiet well and the soldering pen won't fit inside.

Steps:

1. Disassemble the Power supply, remove everything including the board, wires, but keep the screws. (I also kept the board and wires for further projects.)

2.  De-solder the Fan. (or cut the wires for ease.)

3. Attach the fan to the outer holes of the case and screw it. I broke one of the fan screw holes during this process, so tighten them in X format. (Make sure the direction is intake ,to suck the air towards the PSU contraption.)

4.  For safety, add some filter or cloth in the holes that the air will come out. Note that solder smoke can cause cancer. This is a very important step.

5. Find a hole to put out the fan wires from it, make sure it has no contact with the soldering pen. Check couple of times.

6. Get yourself a 12V adapter. PC fans work in the range of 5V to 12V so even a smartphone charger is fine. Check the polarity of the fan as well, red wire is positive and black wire is negative.

7. Enjoy, you now have a protection for your solder, you put it in the holes where the power supply wires used to come out. So you won't burn anything and you keep it safe.
 While soldering you can turn on the fan, it can suck the air in and prevent cancer.
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Why they are so many rumors about smartphone battery?

Image result for smartphone battery 

There are so many rumors about smartphone batteries, for example, some say that charging from 0% to 100% will improve battery life but others disagree. Fast charge is good for battery health, others say no it will damage the battery.

Reasons:
  • Long-Term consequences is hard to measure
  • Usage types
  • Technology evolution
  • Different battery types
  • Hundreds of manufactures

Long-term effects:

Obviously it is hard to measure a 2 to 3 year period of battery life, measuring each cycle, discharge rate, charging rate and etc...  Requires time and patience and it is often expensive.

Different usage types:

People don't use phones equally, A gamer drains the battery in 3 hours while an average user uses the same device for days and the list goes on...
It is not possible to measure each type of usage and their effect on battery health, at least with current technology.

Technology evoloution:

Imagine a company spent time and effort to know the good & bad about a batteries health. While the measuring is done. A new type of battery has already hit the market, so the measurement would be useless and they should redo it for the new battery type.

Battery types :

We have different types of battery. Li-Po, Li-ion and etc....
Each have different properties but this one is easy to tackle because 90% of manufactures use Li-Po and Li-ion.

Tons of manufactures:

There are tons of battery manufactures for smartphones, each company in smartphone, Laptop and tablet industry has it's own battery lab, SAMSUNG, Xiaomi, Dell, Apple, HP, HUAWEI, Sony etc...

What we know for now:

Research centers have some information in hand now, including:
  • Do not discharge your phone to the max, charge it when you get the charge warning.
  • Charge to 100% every month to ensure your unused parts of the battery get a refresh. Not recommended to charge to 100% in every single time.
  • Use latest fast charge platform, each new version add optimizations for security and health of the battery. for example Fast charge 4+ added more heat control which is a great factor.
  • Use certified charger, don't use a 5$ charger for a 500$ phone.
  • Remove bulky casing when charging, to make the battery nice and cool.
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Tuesday, 12 February 2019

My thoughts of Google+

Image result for Google plus 



 As you know Google plus is shutting down in April 2019, I had some experience with it, though I never enjoyed it in a nutshell.
Google keeps failing in creating a major, reliable social media, if you can see the number of attempts this big company has made. Google Allo, Google hangouts, Google talk and now google plus.
You might think that well, I still use some of those but you can't regret the fact that you use Whatsapp, Instagram, Twitter more than Google services.
Me as a user of Google plus was not very sure what type of environment was google plus being used in and what is the purpose of it? I used it to get some news and learn German phrases which was posted by an account everyday. It wasn't perfect but it did the job quiet well.
 several reasons make a platform successful. 
  • Security
  • Creativity (some extra function to compete with others)
  • Developer support
  • Cross-platform
  • Support

Security:

User data leaks from the company caused it to lose the first and most important parameter of a social media platform.
Google defiantly lost some users upon the report of the leakage, so I think the decision of google was right to leave in glory instead of waiting for the users to pull out continuously and causing the name of Google to be ruined in the thoughts of people.
Image result for security

Creativity (extra-functionality):

If you do things as others do, you can never be a successor, you should do some extra-functionality to attract users to your social media. A good simple example would be emojis and stickers. The creativity has no limit and it is dependent to the company.
Google plus wasn't very creative in this era, Facebook always made headlines for Artificial intelligence, Hardware devices and etc. So they pulled users to their company. (Though they are popular for data leakage as well 😃 )

Developer support:

I can't deny that Google's developer support is good, they introduce you the API, upload tutorials, and most importantly, creating forums. 
 Developers should make money from their development which headline number 1 caused the users to migrate to other platforms and developers are left with less revenue. That's why the would prefer a better option like instagram and Twitter.
 
Image result for developer

Cross-platform:

Like the previous headline, Google provided a good cross-platform options. Including Android, IOS, Web etc...

Support:



The support was limited to forums and big companies don't provide good supports due to the high number of users compared to new, small platforms in this era. Google was pretty equal to others in this section too. Not very high, not very low.
Image result for Support

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Tuesday, 5 February 2019

My experience with fake samsung galaxy S9+

Image result for samsung galaxy s9+ fake 



I recently reached to a website which had great deals and by great, I mean so good to be true. The whole galaxy s9+ with original box, new and accessories just for 90$ . Website link

 When I got the package the delivery company was a third party company, so you couldn't complain about the device, because they are not responsible.
The box is nearly identical as the original box, with seal and everything.


in the box we get:
  • fake AKG headphones.
  • fake charger and cable.
  • a silicone case.
  •  sim card pin.
  • The phone itself.

Headphones:

 As I said they where a fake AKG headphones that where manufactured in Vietnam, the sound quality was very poor compared to the original ones but I must admit, it is hard to differentiate between them if you haven't tried both.Volume down button was broken, only Play/Pause, volume up buttons worked.

Charger:

You start to see the difference here, there is no fast charge logo, the phone takes ages to charge and the USB-C cable is like a rubber. has no solid feeling near the port. bends easily.

Sim Card pin:

It was very garbage, I wasn't sure if it was metal even, there were plastic chunks covering all around it like a piece of dust, and it got bent with a tiny force.

The phone itself:

I installed CPU-z application which gave me all the information I needed. Here are the real specs.
  • MediaTEK SoC, MT6580, a low performance processor which Is even worse than the budget line of HTC products. like the desire series.
  • 2 GB of RAM, most of it is taken up by the OS, so you are only left with 900 MB of RAM.
  • 8 gigabytes of storage.
  •  Android lollipop (5)
  • A very dim TN panel screen which is a very bad choice. I had an HTC desire device (which costs 10$ more and has IPS screen)
  • USB-C with no support for OTG, obviously they just added an adapter over the micro-USB
  • Headphone jack.
  • Plastic body, just ionized aluminum over it.
  •  Fingerprint button. it is essentially a button unlocks with every finger and conductive materials.
  • No Heart rate and other sensors, only the fundamental ones.
  • Camera is very noisy, the dual camera setup is fake, The pictures are barely usable. I'll upload samples later on.
  • Battery is OK, it holds up well but expect it to jump from 50% to 10%. It has a percentage error involved in the software.
  • The IMEI number was not registered, so it is going to be easy to get blacklisted by ISP's.
  •  

Software:

The mobile runs a cloned touchwiz which is very buggy, the launcher crashes regularly but I got it fixed with a new launcher.
The developer settings is unlocked out of the box and there aren't much of a custom ROM's for this fake device.

Conclusion: 

I do not recommend this device, I got it out with myself to show it to friends and see if they would know that this is a fake device, most of them did notice it in a first glance, so it is not a good device for look as well, it has random texts like Copyrights and other random License codes on the back.
The phones processor makes it unusable as a daily driver, it lags between pages and took 3 seconds just to open Settings app.
I wouldn't know why would anyone purchase this phone if you want a budget device my recommendations would be Xiaomi, HTC and Huawei. You get a decent customer support along with a better specs for the same price.

This is the customer support I got upon the errors. The guy blocked me totally and never answered back.

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