Testing a UJT

UJT (Uni junction transistor) can be easily tested by using a digital multimeter.The three steps for testing the health of a UJT are as follows.

1. Measuring the resistance between B1 and B2 terminals.

        Set your digital multimeter in resistance mode.Connect the positive lead of multimeter to the B1 terminal and negative lead to the B2 terminal.The multimeter will show a high resistance ( around 4 to 10K ). Now connect the positive lead to B2 terminal and negative lead to B1 terminal.Again the multimeter will show a high resistance (around 4 to 10K ).Also both the readings will be almost same.

How to test a triac.

Testing triac using a multimeter.

     A multimeter can be used to test the health of a triac. First put the multimeter selector switch in a high resistance mode (say 100K), then connect the positive lead of multimeter to the MT1 terminal of triac and negative lead to the MT2 terminal of triac (there is no problem if you reverse the connection).The multimeter will show a high resistance reading (open circuit).Now put the selector switch to a low resistance mode, connect the MT1 and gate to positive lead and MT2 to negative lead. The multimeter will now show a low resistance reading (indicating the switch ON).If the above tests are positive then we can assume that the triac is healthy. Anyway this test is not applicable triacs that require high gate voltage and current for triggering.

How to test an SCR

 

Testing SCR using a multimeter.

          A multimeter can be used to test SCRs quite effectively. The first procedure is to check the diode action between the gate and cathode terminals of the SCR. This test is just like what you have done in the case of testing a silicon diode (see testing a silicon diode).

         Now put the multimeter selector switch in a high resistance position. Connect the positive lead of multimeter to the anode of SCR and negative lead to the cathode. The multimeter will show an open circuit. Now reverse the connections and the multimeter will again show an open circuit.

How to test a Diode

Diodes are one of the components that can be tested very easily.Ordinary diodes as wells as Zener diodes can be checked by using a multimeter. While testing a diode the forward conducting mode and reverse blocking mode has to be tested separately. 

Testing ordinary diode using a digital multimeter.
 

      To check an ordinary silicon diode using a digital multimeter, put the multimeter selector switch in the diode check mode. Connect the positive lead of multimeter to the anode and negative lead to cathode of the diode. If multimeter displays a voltage between 0.6 to 0.7, we can assume that the diode is healthy. This is the test for checking the forward conduction mode of diode. The displayed value is actually the potential barrier of the silicon diode and its value ranges from 0.6 to 0.7 volts depending on the temperature.

      Now connect the positive lead of multimeter to the cathode and negative lead to the anode. If the multimeter shows an infinite reading (over range), we can assume that the diode is healthy. This is the test for checking the reverse blocking mode of the diode.

Top 5 mobile phones under Rs .10,000

      Today on Yahoo, I saw the list of five Mobile phones under Rs.10,000 in India. Five mobile Phones are superb in Look as well as Performance as Compare to others, Under this range. 3 of them are Android Based Smartphones and 1 is Symbian and Left one is Java based Mobile Phone.

     

       According to Post on Yahoo, The Smartphones are Listed Below, and There Feature as Well as also Given along with Price List.

  Samsung Galaxy Y S5360 @ Rs 7,000

Features & Specification :-

• General:GSM 850/900/1800/1900 MHz, 3G with HSDPA
• Form factor: Touchscreen bar phone
• Dimensions: 104 x 58 x 11.5 mm, 97.5g
• Display: 3" 65K-color TFT LCD capacitive touchscreen, 240 x 320 pixels
• CPU: 832MHz ARMv6 processor
• Memory: 256MB RAM, 164MB storage, hot-swappable microSD card slot
• OS: Android OS, v2.3.3 Gingerbread with TouchWiz UI
• Camera: 2MP camera with geotagging, smile detection; QVGA video recording @15fps
• Connectivity: Wi-Fi b/g/n, Bluetooth 2.1 with A2DP, charging microUSB port, GPS receiver with     A-GPS, 3.5mm audio jack, FM radio
• Battery: 1200mAh
• Misc: Built-in accelerometer, multi-touch input, proximity sensor, Swype text input, Office document viewer

Click here to View "Galaxy Y" Specification

          Currently priced at Rs 7,000, the Samsung Galaxy Y has impressive specifications like Android 2.3 Gingerbread operating system with 830 MHz ARMv6 processor, 290 MB RAM and a 2 megapixel camera. In fact, it is one of the few smartphones under Rs 10,000 to feature Android 2.3, and that too with a powerful processor.

          Galaxy Y comes with a 3 inch TFT capacitive touchscreen, Samsung's TouchWiz user interface and multi touch function. It has 180 MB internal memory which can be expanded by up to 32 GB. Other features include WiFi b/g/n with hotspot, Bluetooth v3.0 A2DP, a 1200 mAh battery, 3G and A-GPS, making it an ideal choice if you're on a budget.

---

Download Cool Game Fall Down for Nokia 5800, N97, X6, 5530 and N8

Fall Down is the most explosive fall down game you may have ever played. It is very simple to start and you can keep a track of your own high scores. All you need is to exercise your wrist a little and focus on allowing the ticking bomb fall.

 If you allow it to touch the top it will explode. The game is really simple. Just keep tilting the phone in either direction to allow the ticking bomb to fall down. Be nimble because if it gets squished at the top it will explode and game will end.

Download Application iGuitar for Nokia 5800, N97, X6, 5530, 5235 and N8

iGuitar is a nice application which provides a user with real time guitar experience on his/her mobile. User can play any song or tune on this guitar as it was prepared with the purpose to make people learn and play guitar.

This guitar comprises of 6 strings with slider keys in the bottom area. User can make use of full fret board by sliding in the left and right direction. This guitar contains 6 octaves which gives the user an immense pleasure of playing any song he likes.

Ek Tha Tiger (2012) Songs Download {Salman Khan}

EK THA TIGER (2012) Info

Directed by	Kabir Khan
Produced by	Aditya Chopra
Screenplay by	Kabir Khan    Neelesh Misra
Story by	Aditya Chopra
Starring	Salman Khan    Katrina Kaif
Music by	Sohail Sen
Cinematography	Ravi K. Chandran
Distributed by	Yash Raj Films
Release date(s)	August 18, 2012
Country	India
Language	Hindi

Ek Tha Tiger (एक था टायगर) is an upcoming Hindi language romantic thriller.The film will be produced by Aditya Chopra and directed by Kabir Khan. This will be his third collaboration with the banner after Kabul Express (2006) and New York (2009). Salman Khan and Katrina Kaif were confirmed to play the lead roles at a press conference held on May 3, 2011 at Yashraj Studios. Though originally scheduled to release on 1 June, 2012, the film was shifted to August 2012 since Aamir Khan wanted to release his next film, Talaash directed by Reema Kagti, on 1st June.

DOWNLOAD SONGS FROM "EK THA TIGER (2012)"

 01 - Jaaniya (Ek tha Tiger)  - [Download]

 More Songs are Coming Soon !!!!

Jannat 2 – New Emraan hashmi And Prachi Desai Atif Aslam Song 2012 Download

New Delhi: It is the era of sequels and after the recent success of ‘Murder 2′, filmmaker Mahesh Bhatt has announced the sequel to the Emraan Hashmi-Sonal Chauhan starrer ‘Jannat’.

JANNAT 2 (2012) Info

Movie                     :     Jannat 2 (2012)

Movie Cast            :     Emraan Hashmi , Prachi Desi

Directed by            :      Kunal Deskmukh

Presented By         :     Mahesh Bhatt

Releasing Date      :      2012

 Download Songs From Jannat 2

01- Judai By Falak (Jannat 2)  - [Download]

02- Mujhe Pyar (Jannat 2)  - [Download]

More Songs From Jannat 2 are Comming Soon !!!!

Any Complaint or Request Post Comment !!! Otherwise HIT Like !!!

6 Zone Alarm with Display

Description :

     This alarm system has 6 independent zones, 1 timed entry/exit zone, a 7 segment LED display and a test or walkthrough facility. Suitable for a small office or home environment, it can also be adapted to use a combination lock or keypad to set and reset the alarm.

Please Note:    All orange +V terminals connect to the point marked +5V at the side of the set switch, S1. IC's 

                                 1,U2,U3,U4,U5 and U7 are drawn without power connections for clarity. The power connections  

                                 need  to go +5V and ground.