Transistor test

How can we say that a transistor which we are using is good or faulty ? 

we can test it by simply using multi-meter. We all know that three junction are in transistor, which are Emitter, Base ,Collector. 

Base-Emitter junction is always forward bias. 

Base-Collector junction is always reverse bias.

Therefore Base-Emitter junction should have low resistance,and Base-Collector junction should have high resistance.

we simply check it by using multi meter. we set multi-meter on Ohms value.

(i) We connect one Emitter to negative terminal and Base to positive terminal of the transistor.

Typically ohmmeter displays value 100 to 1 K . So forward side resistance is low, now we have to check on output side which is Collector Base side.

(ii) When we connect positive terminal to Base and negative terminal to Collector if it shows 100K or higher ohms, So it is good transistor.

If multi-meter  displays any other value like forward side high and reverse side low than transistor is faulty.

above example is for NPN transistor, but you can apply for PNP only polarity is reversed.

Samsung Galaxy S7

Network- Technology GSM/HSPA/LTE
Body  Dimensions 142.4 x 69.6 x 7.9 mm
           Weight-       152 gram
           Build-          Corning Gorilla glass 4 back panel
           SIM-           Single Sim (Nano SIM) or Dual SIM (Nano SIM)

Display  Type - Super AMOLED capactive touchscreen, 16 M colors

               Resolution-1440 x 2560 pixels

               Multi touch- Yes 

Plateform  OS- Anroid OS v6.0

                   Chipset- Qualcomm MSM8996 Snapddragon 820

                   CPU- Dual core 2.15 GHz kryo & dual core 1.6 GHz kryo

                   GPU- Adreno 530

Memory  Card slot- microSD up to 200 GB -single SIM model

                                   microSD up to 200 GB -dual SIM model

                 Internal-    32/64 GB , 4 GB  RAM

Camera Primary- 12 MP,26 mm  Led flash 

               Features- 1/2.6" sensor size, 1.4 micro m pixel size, geo- tagging, simultaneous 4K video     and 9MP image recording, touch focus, face/smile detection, Auto HDR, panorama.

               Video - 2160p@30 fps, 1080p@60 fps, 720p@240fps, HDR,dual video record 

               Secondary- 5 MP, f/1.7 ,22mm ,dual video call, Auto HDR 

Cheapest smart phone costs Rs. 251 Book now !!!

world's cheapest smart phone in the world in India is now available .

To book it now open below link
Freedom 251


Specifications

      Display

• Screen Size - 4.00 inch
• Resolution - 540 x 960 pixels

     Hardware

• Processor -             1.3 GHz quad core
• RAM -                   1 GB
• Internal Memory - 8 GB
• Expand. Memory- 32GB

   Camera 

• Rear  - 3.2 Mega Pixel
• Front - 0.3 Mega Pixel

   Operating System 

• OS - Android 5.1 

    Other Features 

• Wi fi  -         Yes 
• Bluetooth -   Yes
• FM  -            Yes
• GSM-           Yes 
• 3G -              Yes 

Its name is FREEDOM 251  
here are some of picture of it!

The freedom 251 is complies government's make in India program. its price is Rs 251 (approx 4$)
worlds chepest.

 Its design completely looks similar to i6s (apple).

Freedom 251 has 4 inch IPS display. It is powered by a quad core SoC clocked at 1.3 GHz, coupled with 1 GB RAM.

Download videos from FB using 3 easy steps!!!

we show so many videos in facebook, some of them are very nice and if you wish to download that videos for your collections than here are simple steps by following them you can download them.

Follow 3 easy steps for downloading videos from facbook

1.Open video - 

First open a video which you like to download. 

GIF

We show many times in some of social networking sites mainly in Face book that one picture where in center it is written GIF in middle of picture like below :

its full name is Graphic Interchange Format (GIF)
The main question is how to make it :


We can make GIF online and offline .

Online process is very easy , there are so many websites available like

make gif

gif creator.


ezgif.com

these are some of them and so other many are available .
 In such websites you have to just upload photos and resize them make in sequence as you needed and then create it . you can directly share it on any of social networking sites if you wishes.


Offline process is also good one .

But  you needed to download software for it .

1. using video converter tool


2. Easy GIF maker

3.Giffing Tool



By using this tools and websites you can make your own GIF .