About Modem and Various Types

The blessing of technology, world has connected to any place. You can one click on your computer and it connect you any part of the world. Connect you any part of the world, It’s possible for electronics device, it’s called Modem. Modem is one of the most popular hardware in communication system. Modem connects with telephone line and created communication to anyone. The name of Modem comes from Modulator and Demodulator. Modem works both of, like Modulator and Demodulator. For this reason it called Modem. It’s works at analog and digital signals. When it works then it convert analog signal to digital signal and digital signal to analog signal. Some time it called DCE (Data Circuit terminating Equipment), because it connect computer with network.

various types of Modem :

USB Modem

Wireless Modem

Fax Modem

External Modem

Cable Modem

PCI Modem

On-board Modem

Audio Modem Riser

Answer-only Modem

Internal Modem

Software Modem

Host-based Modem

Null-Modem cable

Direct connect Modem

Sony Xperia Z1 - Full Phone Specifications

The Sony Xperia Z1 was announced in 2013,september. It has big screen(5.0 inches) and also high level image quality.Sony Xperia Z1 water and dust proof, it can water resistant 30 minutes and over 1 meter.

Sony Xperia Z1 has three colors they are Black,White,Purple.

Now here have Sony Xperia Z1 full specification :

Key Features	Description
OS	Android OS, v4.2 (Jelly Bean)
Chipset	Qualcomm MSM8974 Snapdragon 800
CPU	Quad-core 2.2 GHz Krait 400
GPU	Adreno 330
RAM	2G
Sensors	Accelerometer, gyro, proximity, compass
Messaging	SMS (threaded view), MMS, Email, IM, Push Email
Browser	HTML5
Radio	Stereo FM radio with RDS
GPS	Yes, with A-GPS support and GLONASS
Java	Yes, via Java MIDP emulator
Colors	Black, White, Purple
Network	2G-GSM 850 / 900 / 1800 / 1900 - all versions 3G-HSDPA 850 / 900 / 1700 / 1900 / 2100 - all versions 4G-LTE 800 / 850 / 900 / 1700 / 1800 / 1900 / 2100 / 2600 - C6903 LTE 700 /           850 / 900/ 1700 / 1900 / 2100 / 2600 - C6906 LTE 800 / 850 / 900/ 1700       /1800 /1900 / 2100 / 2600 - C6943
SIM	Micro-SIM
Dimensions	144 x 74 x 8.5 mm (5.67 x 2.91 x 0.33 in)
Weight	170 g (6.00 oz)
Display Type	TFT capacitive touchscreen, 16M colors
Display Size	1080 x 1920 pixels, 5.0 inches (~441 ppi pixel density)
Multitouch	Yes, up to 10 fingers
Protection	Shatter proof and scratch-resistant glass
Alert types	Vibration; MP3 ringtones
Loudspeaker	Yes
3.5mm jack	Yes
Memory card	MicroSD, up to 64 GB
Internal memory	16 GB
GPRS	Up to 107 kbps
EDGE	Up to 296 kbps
Speed	HSDPA, 42 Mbps; HSUPA, 5.8 Mbps; LTE, Cat4, 50 Mbps UL, 150 Mbps DL
WLAN	Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi Direct, DLNA, Wi-Fi hotspot
Bluetooth	Yes, v4.0 with A2DP
NFC	Yes
USB	Yes, microUSB v2.0 (MHL), USB On-the-go
Camera	Primary 20.7 MP, autofocus, LED flash, check quality,1/2.3'' sensor size, geo-tagging, touch focus, face detection, image stabilization, HDR, panorama
Secondary	Yes, 2 MP, 1080p@30fps
Video	Yes, 1080p@30fps, video stabilization, HDR, check quality
Buttery	Non-removable Li-Ion 3000 mAh
Stand-by	Up to 880 h (2G) / Up to 850 h (3G)
Talk time	Up to 13 h 50 min (2G) / Up to 15 h (3G)
Music play	Up to 110 h
Announced	2013, September
Status	Available. Released 2013, September

Walton primo F3 full Specification And Price in BD

Walton primo F3   Price : 8490 BDT only

Walton has announced new mobile phone in October 2012, Name Walton Primo F3. Walton Primo F3 is a smart phone. The price of walton primo F3 in Bangladesh is 8490TK only. 3G, WLAN, GPS, dual sim are also available in this phone. Operating System Android 4.2.2 (jelly bean),Processor Dual Core 1.3 GHz, ROM 4GB and  RAM 512 MB. Walton primo F3 has big screen with capacitive touch, screen size  4.5-inch FWVGA and screen resolution 480×854 .

Walton Primo F3 Support Micro SD card, up to 32GB, it has dual camera, Rear camera 5 Mega pixels (LED with Autofocus) and front camera VGA.Walton primo F3 has large amount of buttery, it's capacity 1800mAh. Motion sensors Accelerometer (3D), light sensors (Brightness), Proximity is also available in this phone.

Network speed - GPRS / EDGE/ 3G / HSPA+

Naw here have Walton Primo F3 full specification and price :

Key Features	Description
Operating System	Android 4.2.2 (jelly bean)
Processor	Dual Core 1.3 GHz
GPU	Mali 400
RAM	512 MB
ROM	4GB
Call mode	Dual card dual standby
Network type	UMTS + GSM
Network band	GSM 900/1800/1900MHz, UMTS 2100 MHz
Network speed	GPRS / EDGE/ 3G / HSPA+
Screen size	4.5-inch FWVGA, TFT Capacitive Touchscreen
Resolution	480×854
External Memory	Support Micro SD card, up to 32GB
Rear camera	5 Mega pixels (LED with Autofocus)
Front camera	VGA
Video recording	HD (1280×720)
Radio	Support with recorder
Battery Capacity	1800mAh
Buttery Type	Lithium battery
Connectivity	WLAN b/g/n (Wi-Fi), Bluetooth V4, Micro USB V2, 3G – Yes UMTS.
Motion sensors	Accelerometer (3D)
Light sensors	Light (Brightness), Proximity,
GPS module	GPS with A-GPS network-assisted GPS navigation function
Weight	141g (with battery)
Dimension	135 X 67.2 X 10.5mm
Price	8490 BDT Only

80w Mini IPS

In Bangladesh many people have to face unbearable problem for load shedding. So students cannot study properly for absence of electricity. So this circuit may give you solution for removing unbearable problem. Now here have some idea of mini IPS.

Require equipments :

Mini IPS circuit

• DC 12v to AC 220v circuit (80w)
• 220v AC transformer (3A)
• Auto charger circuit
• 12v Buttery (8.5A)
• Energy saving light
• Safety cover box.

At first take a transformer and connect secondary side with auto charger  circuit. Auto charger circuit using for safety charge of buttery. After auto charger circuit connect with DC to AC circuit and buttery. Dc to AC circuit receive 12v from buttery, and supply 220v AC. This IPS work automatically. Then 25w two energy saving light connect with mini IPS. This mini IPS can power supply for two hours.

Symphony W150 Full Specification and Price in Bangladesh & colors

Symphony W150  | Price : 14,990 only

Symphony handset is a new experience in your life. It can give many facilities in limited money. Symphony W150 is a smart phone and many kind's of application is supported in this phone. It's operating system is Android 4.2.1 jelly Bean, display 4.7'' IPS HD capacitive full touch. It has dual camera, rear camera 8 mega pixels and front camera 2 mega pixels. It's processor 1.2 GHz Quad core. Symphony W150 3G supported with video calling. This phone has 1GB RAM & 4GB ROM . Available application is Facebook, Youtube, Android Market (play store), Nimbuzz, Skype, Office suite, Dictionary, Temple Run, Gmail.

This phone also support Full HD 1080p video. GPS, G-sensor, Proximity & Accelerometer sensor, HD Game support, Micro SIM support.

Symphony W150 available three color, they are Black, White, Blue.

Now here have Symphony W150 full specification and Price:

 

Key Features	Description
Operating system	4.2.1 Jelly Bean
Processor	1.2 GHz Quad core
Display Size	4.7” IPS HD Capacitive Full Touch
Camera	8MP Primary + 2MP Secondary
Multimedia	MP3, MP4, FM
Data Services	3G, EDGE,GPRS ,Wifi
Phonebook Entries	Unlimited
Multitouch	Yes
Display Resolution	HD (1280*720)
CPU	1.2 GHz (Quad Core)
GPU	PowerVR SGX 544
Internal Memory	RAM 1GB (User Available RAM 971 MB)
Storage	ROM Total 4GB(User Available ROM 1008 MB), Extended up to 32GB
Camera Feature	Flashlight, PC Camera
Battery	1800 mAh Li-ion
WLAN	Wi-Fi 802.11, Wi-Fi Hotspot, HSDPA:5.76Mbps; HSPUA: 7.2Mbps
GPS	Yes
Stand by time*	280 Hour(*depend on phone setting, Network)
Talk time	04 Hour(*depend on phone setting, Network)
Audio Player	Yest
Audio Recorder	Yes
Video Player	Record Full HD 1080P Video
Video Recorder	Yes
3.5 mm jack	Yes
Dimension	7.9mm
Recorder	Audio, video & call recorder
Bluetooth	Yes
USB Mass storage	Yes
USB Modem	Yes
MMS	Yes
Email	Yes
Built in Applications	Angry Birds, Highway rider, Facebook, Youtube, Android Market(Play Store), Temple Run, Nimbuzz, Gmail, Skype, Office suite, Dictionary
Special Features	GPS, G-sensor, Proximity & Accelerometer sensor, Full HD 1080P Video support, HD Games support, 7.9mm super slim, Micro SIM support
Color	Black,White,Blue
Price	14,990 BDT only

Walton Primo NX Full Specification and Price 17,990TK

Walton primo NX  Price: 17,990 Tk only

Walton primo NX is full Android mobile phone. It's officially declared 5th july 2013. Walton primo NX latest and smart handset from Walton.

Walton Primo NX phone is 3G supported. It's operating system 4.2.1 (jelly bean). Walton primo NX price in Bangladesh is 17,990 TK. It's buttery capacity 3000mah, processor-28nm Quad-core 1.2GHz . It has dual camera (Rear camera 13.0 mega pixels and Front camera 3.0 mega pixels). It's Memory 1GB and storage space 4GB. Walton primo NX dual sim card standby, Network speed-GPRS / EDGE/ 3G / HSPA / HSPA+

Walton primo NX has big screen (5.3-inch HD) and screen resolution-1280 × 720. It has capacitive touch screen and 3.5 mm narrow frame.

 

 Now here have Walton Primo NX Full Specification and price :

Key Features	Description
Operating System	Android 4.2.1 (jelly bean)
Processor	28nm Quad-Core 1.2GHz
GPU	1GB
Storage space	4GB
Call mode	Dual card dual standby
Network type	UMTS/GSM + GSM
Network band	GSM850/900/1800/1900MHz, UMTS 2100 MHz
Network speed	GPRS / EDGE/ 3G / HSPA / HSPA+
Screen size	5.3-inch HD
Resolution	1280 × 720
Touch & protector	Capacitive touch screen with 1st generation gorilla glasst
Screen type	ultra black level with vivid IPS
Sensor	CMOS
Rear camera	BSI 13.0 Mega pixels with F/2.2 & Blue glass
Front camera	3.0 Mega pixels
Video recording	Full HD (1080p) (1920x1080)
Flash	Support
Radio	Support with recorder
Connectivity	WLAN b/g/n (Wi-Fi), Bluetooth V4, Micro USB V2 USB on The Go (OTG), Mobile High-Definition Link (MHL) Wireless Display Sharing
Motion sensors	Gyroscope, Accelerometer (3D), Gravity, Linear Acceleration, Orientation, Corrected Gyroscope Sensor, Rotation Vector
Light sensors	Light (Brightness), Proximit
GPS module	GPS with A-GPS network-assisted GPS navigation function
Weight	189g (with battery)
Dimension	152 X 77 X 9.9 mm
Battery Capacity	3000mAh
Type	Lithium battery
External Memory	Support Micro SD card, up to 32GB
Price	17,990 BDT Only

Emergency Light and Block Diagram

What is emergency Light ?

Emergency lighting system means, when absent of electricity and usual lighting is failed then emergency light automatically on. It can limited time backup by internal Buttery. when the electricity available then emergency light automatically off and automatically recharge Buttery. Here have emergency lighting picture.

Emergency Light

  Handmade Emergency Light Block Diagram :

This emergency Light made for removing darkness in your bedroom, drowning room, kitchen and corridor etc. It can move one to another and it's easy to carry.

Required equipments :

Resistor   - 110k

Diode      - 5 pic

Capacitor - 1uF/400V Poly

LED        - White

Buttery    - 4 Volt

USB Dongle 2.0 (Bluetooth)

This Bluetooth Drive can, non Bluetooth computer convert into a Bluetooth enabled. It can contact with wireless Bluetooth connection such as PC, Networking, Dial-up, Fax, Mobile Phones etc. It also connection to Bluetooth headset and transferring voice data and It also multi languages supporting.

 

 Specification :

Key Features	Description
Bluetooth Specification	V2.0 & v1.2 compliant
Supporting Profiles	Networking, Dial-up, Fax, LAN access, and Headset
Operation System	Windows98, 98se, Me, 2000, XP, Vista, Windows7
Interface	USB compliance
Symbol rate	3Mbps
Receiving/sending range	0-100m
Price	110TK BDT Only

(USB) Pen Drive Device

USB Pendrive

The full meaning of USB is Universal Serial Bus. It is a flash memory device. It can transfer audio, video and data files from a computer. Pen Drive is easy to use for new generation. It can move the data from the hard disk device to another drive in a several minutes. Pen Drive is also easy to carry, enough to fit in to pocket and it also smaller then a Floppy disk. USB pen drive using as a boot-able device. Laptop/computer can be setup by Pen Drive. Available Pen Drive in the market is 2GB, 4GB, 8GB, 16GB, 32GB & 64GB. Different types of Pen Drive are available in the market but all kinds of Pen Drive are not boot-able. So check Pen Drive for boot before you buy.