Archives For Electronics

Today’s EIO post is on audio amplifier boards. Amplifiers are devices that increase the gain of an audio signal and currently dominate modern audio technologies. With audio amplifier boards, you can design and build your own audio amplifier from scratch using basic electrical engineering principles.

1350036294256870242

Introduction:

The term amplifier refers to any device that increases the amplitude of a signal, usually measured in voltage or current. This versatile device is used in a variety of different electronic applications. Especially in audio technology, a wide range of amplifiers can be produced based on product specifications (i.e. power, voltage, current). Currently, there are many types of audio amplifiers available for consumers. Sound signal amplification is used for instruments, such as the guitar or the bass. They are also used commonly in home theater systems and with stereo speakers. The basic design behind all of these amplifiers is derived from the simplest concepts of circuit design.

Classes of Amplifiers:

Assembled in different configurations, resistors, capacitors, and transistors can create several classes of amplifiers that can be distinguished by performance characteristics. Class A amps are very linear (meaning the integrity of the signal is maintained through the amplification process); however, this amplifier topology is known to be very inefficient. In addition, Class A amplifiers invert the signal (meaning the function is reflected over its axis). Class B amps are much less linear, leading to higher distortion of the signal, but they are much more efficient. Since a Class B amp only amplifies half of a signal, two Class B amps are generally used in synchronization. The compromise between these two topologies is the Class AB amplifier. The Class AB is more efficient than the Class A with lower distortion than the Class B. Often the different types of amplifiers are used in combination with other amplifiers into order to achieve the specifications of a particular design.

Some of Our Products:

Sure Electronics AA-AB32291 2 X 250Watt Class D Audio Amplifier Board – IRS2092

41717_1_

supplier: Sure Electronics859

part #: AA-AB32291

Suppliers: Sure Electronics  Type: Audio
Each channel is rated at 250WEfficiency: 90% @ 250W,8Ω, Class D stage
Model
Brand Sure Electronics
Model AA-AB32291
Specifications
Specifications Output Power: Each channel is rated at 250W
·Efficiency: 90% @ 250W,8Ω, Class D stage
·Multiple Protection Features: Over-current protection (OCP), high side and low side MOSFET
·Over-voltage protection (OVP)
·Under-voltage protection (UVP), high side and low side MOSFET
·DC-protection (DCP)
·Over-temperature protection (OTP)
·PWM topology: Self-oscillating PWM and half-bridge.·Power Supply Voltages:±60V
·Load Impedance:8Ω
Features
Features
This 2 X 250Watt Class D Audio Amplifier Board – IRS2092 is a state-of-the-art dual channel Class-D audio amplifier which integrates IRS2092 Class D audio driver IC, along with IR’s digital audio dual MOSFETs. This amplifier is capable of delivering dual-channel amplification with each channel up to 250W. High quality and high performance components are used making this amplifier high-quality amplifier. Powered by ± 55V to ± 65V supply, it can be used in many ampplications like Background Music Systems. It also features thermal protection, Over-current protection, Over-voltage protection, Under-voltage protection and DC-protection. In addition, on-board heat sink ensures excellent heat dissipation.
This is an exceptionally well designed amplifier, with low distortion, good S/N ratio, low consumption and full protection. Having all these almost ideal characteristics this amplifier is likely to become the basic building block of your future high fidelity system, or it can also become the element that will upgrade your existing system.

Sure Electronics AA-AB32261 2 X 150 mW Class-AB Headphone Amplifier Board – LM4881

41715

supplier: Sure Electronics859

part #: AA-AB32261

Suppliers: Sure Electronics  Type: Audio
0.025% THD+N @120mWrms 16Ω0.02% THD+N @75mWrms 32Ω
Model
Brand Sure Electronics
Model AA-AB32261
Specifications
Specifications Features:
Thermal shutdown protection circuitry
Adjustable gain
Wide power supply range: 8V-24V
Audiophile Quality Sound:
0.025% THD+N @120mWrms 16Ω¸
0.02% THD+N @75mWrms 32Ω¸
Applications:
Mini/Micro Systems
Personal Computers
Microphone Preamplifier
MP3 Video CD Output Amplification
Features
Features Use this DIY 2*150mW audio amplifier board which is a perfect class-AB architecture integrated LM4881 chips to achieve the single-channel 150mW power output. Moreover, integrated with LM4881 chip, this board also supports two-channel amplification and can be powered by any DC power supply ranging from 8V to 24V.

Sure Electronics AA-AB32191 2 X 300Watt Class-D Audio Amplifier Board – TAS5630

41716

supplier: Sure Electronics859

part #: AA-AB32191

Suppliers: Sure Electronics
Type: Audio
Frequency response: 20Hz to 20KHz(±3dB)Power supply: 20V to 50VDynamic Range: >100 dB
Model
Brand Sure Electronics
Model AA-AB32191
Specifications
Specifications
  • Power supply: 20V to 50V
  • Channel Separation: >89 dB 1 kHz
  • Dynamic Range: >100 dB
  • Frequency response: 20Hz to 20KHz(±3dB)
  • Signal/Noise Ratio: 100dB(A-Weighted)
  • High Output Power
50W @4 Ω, <0.02% THD+N
100W @ 4 Ω, <0.03% THD+N
200W @ 8Ω, < 0.40% THD+N
  • Operating Temperature: 0℃ to 50℃
  • Storage Temperature: -20℃ to 105℃
Features
Features Another new member of Class-D audio amplifier family comes out – AA-AB32191 which is capable of delivering dual channel amplification with each channel up to 300W. This amplifier is a state-of-the-art dual channel Class-D audio amplifier which integrates TI’s TAS5630 as the driver. High quality and high performance components are used making this amplifier high-quality amplifier. Powered by 20V to 50V supply, it can be used in many applications, such as Home Active Speaker, AV Receiver, Mini Combo System, etc.. It also features short-circuit and thermal protection. In addition, on-board heat sink and cooling fan ensures excellent heat dissipation.
Advertisements

Today’s EIO post highlights an exciting new product (The Makey Makey) that allows consumers to turn everyday objects into touchpads for use with the internet and PC programs.

7167036798_9e490c776f

How Does It Work?

The Makey Makey comes with a set of alligator clips, a USB connector and the interface board. It’s simple to use! All one has to do is load up a computer program or any webpage and you are essentially ready to get started!

For example, let’s say you load up a piano. Then, instead of using the computer keyboard buttons to play the piano, you can hook up the MaKey MaKey to something fun, like bananas, and the bananas become your piano keys:

7167025186_b7b4475e07

Once connected, when the user touches the bananas they will perform as the keys on a piano board! Or let’s say you Google for an online “Pacman” game and draw a joystick with a pencil (yes, an actual ordinary pencil):

7167032404_57ec112d6e

Then you can play Pacman by touching the drawing with your finger!

What Materials Work With Makey Makey:

Any material that can conduct at least a tiny bit of electricity will work (if it doesn’t already work, just rub it with bananas, spray it with water, or apply copper tape). Here are some materials people have used in our workshops including Ketchup, Pencil Graphite, Finger Paint, Lemons, etc.

Other materials that work great: Plants, Coins, Your Grandma, Silverware, Anything that is Wet, Most Foods, Cats and Dogs, Aluminum Foil, Rain, and hundreds more…

Requirements:

MaKey MaKey works with any laptop or computer with a USB port and a recent operating system. How recent? We have tried it with Windows XP, Windows Vista, Windows 7, and Mac OSX.

 

bb8f6a2bcaa86f81e231ce2abfd03442_large

Samsung Solid-State Drives

eiodotcom —  February 15, 2013 — Leave a comment

Today’s EIO post is on Samsung’s new energy-efficient solid-state drives (SSDs).

Samsung Solid-State Drives Overview

The gold standard in speed, capacity, and dependability.

Samsung-SSD

 

Increase energy efficiency while avoiding drive wear and tear

Samsung’s flash-based SSDs help maintain 24 x 7 uptime for mission-critical servers, RAID systems, and network-attached storage. For mobile devices, Samsung SSDs offer small form factor and light weight, together with low power consumption in active and idle modes to lengthen battery life. Because SSDs have no moving parts, they start up instantly and are not subject to the physical wear and tear that can gradually degrade the reliability of traditional hard disk drives.

 

Design advantages of Samsung SSDs include:

 

  • Accelerated read and write operations with outstanding multitasking capabilities
  • Varied interfaces enabling connections to different types of host devices
  • Exceptional durability with high shock and vibration tolerance

Samsung_SSD_fullcolor

 

 

 

 

Preview Some of our Products

 

135SAMSUNG MZ-7PD256BW 840 Pro Series 2.5″ 256GB SATA III MLC Internal Solid State Drive (SSD)

 

45367

 

category: Computers

supplier: Samsung part #: MZ-7PD256BW

Capacity: 250GB – 350GB
 Interface: SATA III  Form Factor: 2.5″
2.5″256GBSATA III
Model
Brand SAMSUNG
Series 840 Series
Model MZ-7PD256BW
Device Type Internal Solid State Drive (SSD)
Used For Consumer
Expansion / Connectivity
Form Factor
2.5″
Capacity 256GB
Interface Type SATA III
Controller Samsung MDX Controller
Height 7mm
Performance
Max Sequential Read 540 MB/s
Max Sequential Write 520 MB/s
MTBF 1,500,000 hours
Environmental
Power Consumption (Idle) 0.054W
Power Consumption (Active) 0.069W

Halloween DIY Project

eiodotcom —  October 25, 2012 — Leave a comment

With Halloween less than a week away, we here at EIO thought it fitting to highlight one of our holiday products.  The Velleman MK166 offers a fun DIY project for those wanting to create a decoration of their own making. Make this into a great Halloween gadget that greets your guests with surprising and creepy sounds!

 

VELLEMAN MK166 Animated Ghost

 

 

 

 

 

 

 

 

 

 

 

Note:  This item requires assembly and also a soldering station.

Soldering station sold separately.

 

 

 

Brand VELLEMAN
Model MK166
Specifications
Specifications
  • ghost responds to sudden noises
  • adjustable sensitivity
  • battery operation: 2xAAA battery
  • dimensions: 5.39 x 2.68 x 1.97″
Features
Features
  • great Halloween gadget
  • greets your visitors
  • for shops, parties, events or just for fun

New Keyboards & Mice

eiodotcom —  October 12, 2012 — Leave a comment

Today’s EIO post is a highlight on some of our new computer keyboards and mice.

This week we got several new items that you can accessorize your desktop with.  Whether it be wireless keyboards and mice or if you choose to opt for a more ergonomic setup, we have a variety of products that can fit your needs.

 

 

Kensington K72406US PocketMouse Black 3 Buttons 1 x Wheel USB Wired Optical 1000 dpi Mobile Mouse

 

Compact size for travel convenience

Reliable plug-and-play operation with wired USB connection

Scroll wheel with middle button

 

 

 

 

Targus AMU81USZ Black 3 Buttons 1 x Wheel USB Wired Optical 1000 dpi Mouse

 

USB Optical 3-button mouse

1000 dpi

wired

 

 

 

 

 

Macally Pebble 5 Button USB Laser Mouse

 

4-way scrolling with Tilt Wheel Technology

Selectable laser resolution (400, 800 and 1600 dpi)

Ergonomically designed

 

 

 

 

 

Microsoft B2L-00002 Comfort Curve Keyboard 2000 Black 105 Normal Keys USB Wired Ergonomic Keyboard

Spill-resistant design
Don’t worry about liquids near your desktop—this keyboard is designed to withstand accidental spills.

Ultra-thin profile keys
The sleek, notebook-like keys feel comfortable and look great.

Comfort Curve keyboard design
If you prefer a flat keyboard, let this ergonomic design help your hands rest in a more natural position.

Cutting-edge design
Improve your performance as you keep current with the very latest technology Microsoft has to offer.

 

LOGISYS KB209BK Streamline Character-illuminated Blue LED Keyboard Black USB Wired Ergonomic Keyboard

The Streamline Designed Full-sized Blue LED keyboard has the newest Apple style clean-cut square-shaped key design.

Each key was individually positioned with space between keys to make the typing easier and faster.

With the UV illumination technology, the lighting is much brighter and comfortable to your eyes.

The keyboard uses the latest anti-slip rubber-like material for soft touch typing experience.

The PerfectStroke key system distributes typing force evenly across key surfaces, making every keystroke comfortable, fluid and whisper-quiet!

Like all Logisys illuminated keyboards, the keyboard has the longest power cord (7 Feet) in the market.

 

LOGISYS KBMS202BK Black USB Wired Standard Enhanced Keyboard and Mouse Combo

Keyboard features:
Streamline, durable design ideal for new systems and replacement applications.
Low-force key switches provide quiet and positive tactile response.
Adjustable tilt mechanism offers comfortable typing positions

Mouse features:
Reliable USB wired mouse.
3D optical scroll wheel mouse.
Quiet performance with best value.
800dpi resolution to work with various applications.
Over 1million cycle of switch life.
Plug and play

Enermax KM001W Briskie Keyboard & Mouse – Black

  • Number of Keys: 107
  • Pointing Device Type: Mouse
  • Pointing Device Connectivity Technology: Wireless
  • Pointing Device Wireless Technology: RF
  • Movement Detection: Optical
  • Movement Resolution: 1600 dpi
  • Number of Total Buttons: 4
  • Scroller Type: Scroll Wheel
  • Keyboard/Keypad Host Interface: USB
  • Pointing Device Host Interface: USB
  • Keyboard/Keypad Color: Black
  • Pointing Device Color: Black
  • Keyboard/Keypad Height: 0.65″
  • Keyboard/Keypad Width: 17.80″
  • Keyboard/Keypad Depth: 5.24″

Voltage Testers

eiodotcom —  October 8, 2012 — Leave a comment

Today’s EIO post is on Voltage Testers:

Making electrical repairs in your home can save you hundreds of dollars in service costs. One tool you’ll need to get started is a voltage tester. If you have a voltage tester, you can test outlets and light switches to see if voltage is present in their circuits. The most basic type of voltage tester consists of a small, pen-like device with a red lead and black lead extending from it.

What is a Voltage Meter?

    • A voltage meter is a device that is used to measure the strength of an electrical current flowing within an electrical circuit. Essentially what it does is measure the electrical potential (the strength of an electrical charge) at two specific points within the circuit. It then compares these potentials and presents the difference between the two. This difference is the rate at which current florws through the circuit. Voltage meters can be analog devices which use an arrow to indicate the electrical potential, while digital ones provide a read-out.

    Structure

    • At the center of the voltage meter is a magnet connected at both ends to pieces of magnetized iron. Sitting between the ends of the magnet is a cylinder made of iron. Because of its placement, the cylinder sits within both the positive and negative fields put out by the magnet. A coil of copper wire is wrapped around the far end of the cylinder, all of which is fitted into a housing. At the far end of the wire is a needle, steadied on either side by a spring. Behind the needle is the dial representing voltage. Fitted on the outside of the housing are two more wires, each of which connects to either end of the magnet.

    How Does a Voltage Meter Work?

    • When the voltage meter is at rest, the needle points to the left side of the meter, representing zero electrical potential. The wire leads are attached to two parts of a live circuit. This causes the electricity to polarize the magnet within the meter even further. Should the difference of the potential between the two wires be a positive number, which it would be if any electricity were flowing through the circuit at all, the magnetic field within the meter becomes positively imbalanced, causing the needle to pull from the left side of the meter to the right, indicating how strong the electrical potential is.

Products

VELLEMAN DVM850BL 3 1/2 DMM

Suppliers: VELLEMAN
Type: Digital
HOLD FUNCTION
LCD Backlight
Features* DMM with automatic polarity function and 3 ½ digit LCD display
* measurements: DC current up to 10A, AC and DC voltage up to 600V, resistance up to 2Mohm
* diode, transistor and continuity test with buzzer
* data-hold function and backlight
* with protection holster

Specifications

* DC voltage: 200m/2/20/200/1000V
o basic accuracy: –
o input impedance: –
o maximum input: 600V
* AC voltage: 200/600
o basic accuracy: –
o input impedance: –
o frequency range: –
o maximum input: 600V
* DC current: 200µ/2m/20m/200m/10A
o basic accuracy: –
o overload protection: 10A
* AC current: –
o basic accuracy: –
o overload protection: –
* resistance: 200/2k/20k/200k/2M
o basic accuracy: –
o overload protection: –
* capacitance: –
o accuracy: –
* inductance: –
o accuracy: –
* frequency: –
o basic accuracy: –
o overload protection: –
* temperature: –
o basic accuracy: –
* overrange: yes “1”
* continuity buzzer: yes
* transistor test: yes
* diode test: yes
* low-battery indication: –
* maximum display: 1999
* LCD display size: 1.8″ x 0.7″
* ranging mode: manual
* data hold: yes
* backlight: yes
* dimensions: 2.7″ x 5.4″ x 1.2″
* weight (with battery): 13.2275 oz
* power supply: 1 9V 6LR61 battery (incl.)
* packing: –
* accessories: –
* auto power-off: no

VELLEMAN VTTEST8 LAMP CHECKER

Brand VELLEMAN
Model VTTEST8
Specifications
Power Supply 9V battery (included)
Features
Features
  • for lamps with one of the following fittings: G13, B15d/G5, G4/GU5.3/GY6.35, E27, E14, E10
  • “beep”-signal confirms that lamp functions normally

VELLEMAN VTTESTL LED TESTER

Brand VELLEMAN
Model VTTESTL
Specifications
Normal LED test range between 2-30mA
All others test range between 20 and 150mA
Power Supply 9V battery (6F22SC, included)
Dimensions 0.26″ x 0.18″ x 0.06″
Weight 2.82oz
Features
Features
  • handy, versatile and portable LED tester
  • types of LED:
    • normal LED
    • bi-colour LED (CA and CC)
    • superflux (spider) LED

VELLEMAN VTTEST2 DIGITAL VOLTAGE TESTER – WITH LCD

Brand VELLEMAN
Model VTTEST2
Specifications
Specifications
  • voltage tester (AC or DC) between 12V and 220V
  • grounding test and testing of broken lines
  • with LCD
  • size: 0.44ft

Today’s EIO post is on digital photo frames. A digital photo frame (also called a digital media frame) is a picture frame that displays digital photos without the need to print them or use a computer.

Features

Digital photo frames’ common sizes range from 7 inch (17.8 cm) to 20 inch (50.8 cm), keychain-sized. Some digital photo frames can only display JPEG pictures. Most digital photo frames display the photos as a slideshow and usually with an adjustable time interval. They may also be able to send photos to a printer.

Digital photo frames typically display the pictures directly from a camera’s memory card, though certain frames also provide internal memory storage. Some allow users to upload pictures to the frame’s memory via a USB connection, or wirelessly via  Bluetooth technology. Some frames allow photos to be shared from a frame to another.

Certain frames can load pictures over the Internet from RSS feeds, photo sharing sites such as Flickr, Picasa and from e-mail. Such networked models usually support wireless (802.11) connections. Moreover, some digital frames now use cellular technology to transfer and share files easily and faster.

Most 7 inch (17.8 cm) models show images at 430 x 234 or 480 x 234 pixels. With some models the width of each landscape image is stretched to achieve an aspect ratio of 16:9, which results in noticeable distortion. Built-in speakers are common for playing video content with sound, and many frames also feature remote controls.

 

Our Products (For a complete listing click here)

 

Kodak EASYSHARE D1025 10.4″ 800 x 600 Digital Photo Frame

 

Brand COBY
Model EASYSHARE D1025
Specifications
Display 10.4″ aSi TFT active matrix
Display Area 8.3 × 6.2 in.
Resolution 800 × 600
Brightness 300 cd/m2
Contrast Ratio 500:1
Media Support USB and Card Slot
Image Formats Supported JPEG, EXIF
Memory Card Supported SD/SDHC/MMC/MS/MS PRO/MS PRO DUO/XD
Power Supply 100–240 V AC, 50–60 Hz (WW)
5 V DC
Dimensions 11.0 × 13.0 x 1.5 in.
Features
Features Add new images in just three steps—insert your memory card, copy pictures to the frame, then remove the card so you can take more pictures.

  • Personalize your digital frame—simply put a traditional frame over the digital frame’s panel to match your home décor and style
  • The unique design allows you to pair your digital frame with hundreds of standard 8 × 10 in. picture frames, even a favorite you might already have (package contains one 8 × 10 in. decorative frame)
  • Mount your frame on a wall, or display on a table, anywhere in your home—vertically or horizontally
  • Discreet cord design—barely visible

View your pictures on the 10 in. high-resolution display featuring KODAK Color Science Technology for vibrant color and crisp detail.

  • Store up to 4,000 pictures directly on your frame’s 512 MB of internal memory
  • Insert your memory device with your digital pictures and easily save your pictures in the frame’s internal memory
  • Pictures are automatically resized to fit more on the frame and still look beautiful
  • Insert a memory card or USB flash drive and see your pictures right away
  • Choose to see your pictures in order or at random
  • Select from three different transitions and duration times
  • ENERGY STAR qualified for efficient power consumption
  • Mercury-free panel

 

 

 

 

 

 

 

 

 

 

Aluratek ADMPF315F 15″ 1024 x 768 Digital Photo Frame

 

Brand Aluratek
Model ADMPF315F
Specifications
Display 15” TFT true color LCD
Resolution 1024 x 768
Memory Card Supported Supports many memory card formats such as: SD / SDHC
Interface USB
Internal Storage 256MB
Remote Control Yes
Power Supply AC Adapter
Features
Features
  • 15” TFT true color LCD (1024 x 768 resolution) w/ 256MB flash memory included
  • Easy operation as most file formats are automatically recognized
  • High quality wooden black frame with built-in speakers
  • Supports many memory card formats such as: SD / SDHC
  • Supports various picture / video / audio formats
  • Connect your personal computer, memory card or USB drive and easily transfer your favorite pictures, music, or videos with hi-speed USB 2.0
  • Setup photo slideshows with background music
  • Built-in clock and calendar
  • Mount on your wall for digital signage
  • Removeable frame stand rotates 90° for vertical orientation
  • Ease of operation and control with the included remote

 

 

 

 

 

 

 

COBY DP1052 10.4″ 800 x 600 Digital Photo Frame with MP3 Playback

 

Brand COBY
Model DP1052
Specifications
Display 10.4″ TFT LCD
Resolution 800 x 600
Brightness 250 cd/m2
Contrast Ratio 400:1
Media Support SD, MMC, CF, MS, xD, USB Flash Drive
Audio File Format MP3, WMA
Video File Format MJPEG, MPEG-4 (XviD), H.264
Image File Format JPG
Language Supported English, French, Spanish, German, Italian, Portuguese, Polish, Russian
Power Supply AC 100-240V; DC Power In: 12V, 2A
Features
Features
  • 10.4″ TFT LCD color display
  • Classic wooden frame
  • Displays JPEG photo files
  • Plays MP3 and WMA music files
  • Plays MPEG-4, H.264, and Motion JPEG video files
  • Photo slideshow mode with music
  • Calendar and clock with alarm timer
  • SD, MMC, MS, xD, and CF card slots
  • Full-size USB port for use with flash memory drives
  • Integrated stereo speakers
  • Full-function remote control included
  • Wall-mountable design with detachable stand