Archives For DIY Projects

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.

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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

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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.
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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.

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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:

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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):

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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.

 

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Velleman Screwdriver Sets

eiodotcom —  October 26, 2012 — Leave a comment

Today’s EIO post is an introduction to some of Velleman’s screwdriver sets.

We sell a wide variety of screwdriver sets that can be useful in a large number of projects.  Whether you need smaller precision screwdrivers for delicate projects or a larger and more robust set, you’re sure to find something that fits your needs in the options below.

VELLEMAN VTSET5 16-PC PRECISION SCREWDRIVER AND TOOL SET

  • swivel-headed cap
  • black oxidized tips for greater durability and accuracy
  • ideal for: TV sets, communication instruments, optical instruments, cameras, computers, VCR’s, telephones, etc.
  • 4 philips: PH#1-1, PH#1-2, PH#0, PH#0-2
  • 3 socket: 0.12″, 0.16″, 0.20″
  • 3 hex: 0.06″, 0.08″, 0.10″
  • 6 flat: 0.04″, 0.06″, 0.08″, 0.09″, 0.12″, 0.15″

VELLEMAN VTSET20 SCREWDRIVER SET 7 pcs 12 BITS

   * bit length adjustable (0.6″ – 3.7″) by sliding it up into or out of the hollow handle

* 6 different blades (12 bits) (L : 4.3″)

  * contents:
o 1 handle (L : 4.3″)
o philips: PH00, PH1
o flat: 0.08″, 0.16″
o ‘star’: T5, T6, T7, T8, T9, T10, T15, T20

Velleman VTSET17 10-PC ELECTRONIC SCREWDRIVER SET

  • philips: 1 PH0, 1 PH1
  • flat: 2 0.05″, 4 0.04″, 1 0.06″, 1 0.08″
  • special set for watches, precision applications, etc.
  • ideal for: TV sets, communication instruments, optical instruments, cameras, computers, VCR’s, telephones, etc.

VELLEMAN VTSET15 15-PC SCREWDRIVER TOOL SET

ideal for: TV sets, communication instruments, optical instruments, cameras, computers, VCR’s, telephones, etc.

  • flat: 0.12″x1.6″, 0.08″x1.6″, 0.10″x1.6″, 0.14″x1.6″, 0.16″x1.6″
  • philips: PH#00×1.6″, PH#0x1.6″, PH#1×1.6″, PH#2×1.6″
  • ‘star’: #T6x1.6″, #T8x1.6″, #T9x1.6″, #T10x1.6″, #T15x1.6″, #T20x1.6″
  • size: 4.7″

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

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

Computer Cases 101

eiodotcom —  October 2, 2012 — Leave a comment

Today’s EIO post is an introduction to computer cases and their uses.

 

What Is A Computer Case?

 

 

 

A computer case (also known as a “computer chassis”, “cabinet”, “box”, “enclosure”, “housing”, or simply “case”) is the enclosure that contains most of the components of a computer (usually excluding the display, keyboard and mouse).  Cases are usually constructed from steel (often SECC — Steel, electrogalvanized, cold-rolled, coil) or aluminium. Plastic is sometimes used, and other materials such as wood and even Lego blocks have appeared in home-built cases.

 

Design

 

Computer cases usually include sheet metal enclosures for a power supply unit and drive bays, as well as a rear panel that can accommodate peripheral connectors protruding from the motherboard and expansion slots. Most cases also have a power button or switch, a reset button, and LEDs to indicate power status as well as hard drive and network activity. Some cases include built-in I/O ports (such as USB and headphone ports) on the front of the case. Such a case will also include the wires needed to connect these ports, switches and indicators to the motherboard.

 

Hardware Access

 

Tower cases have either a single side panel which may be removed in order to access the internal components or a large cover that saddles the chassis. Traditionally, most computer cases required computer case screws to hold components and panels in place (i.e. motherboard, PSU, drives, and expansion cards). Recently  there is a trend toward “screwless” cases, in which components are held together with snap-in plastic rails, thumbscrews, and other methods that do not require tools; this facilitates quick assembly and modification of computer hardware.

 

 

Products

 

 

APEVIA X-CRUISER-AL Silver Steel ATX Mid Tower Computer Case

 

ATX Mid Tower
Front Temp, Sound, Fan Speed Gauges
Front 2 x USB 2.0, 1 x Firewire, 2 x audio
Model
Brand APEVIA
Model X-CRUISER-AL
Specifications
Type ATX Mid Tower
Color Silver
Case Material Steel
Power Supply No
Power Supply Mounted Top
Motherboard Compatibility Standard ATX / Baby AT / Micro ATX
Main Board Size: Fits up to 11″ x 12″
With Side Panel Window Yes
Expansion
External 5.25″ Drive Bays 4
External 3.5″ Drive Bays 2
Internal 3.5″ Drive Bays 4
Expansion Slots 7
Front Ports
Front/Top Ports 2 x USB 2.0, 1 x Firewire, 2 x audio
Cooling System
80mm Fans 2 x 80mm fan – front (optional)
1 x 80mm UV blue LED fan – top (included)
1 x 80mm UV blue LED fan – rear (included) upgradable to 120mm fan.
Side Air duct UV Air Duct and Filter on Side Window (Thermally Advantaged Chassis)
Physical Spec
Dimensions(L x W x H) 19.25″ x 7.75″ x 17.00″
Features
Features Modern Sophisticated Stylish Design
Large See-through Side Window
1 x UV Air Duct and Filter on Side Window (Thermally Advantaged Chassis)
1 x Front Fan Gauge w/ Fan Controller (Controls up to 5 fans)
1 x Front Temperature Gauge with Blue Back Lighting
1 x Front Volume Gauge and Volume Controller
Front Panel LED Lights

 

 

 

 

 

 

 

 

 

APEVIA MX-PLEASURE-BK Steel ATX Full Tower Computer Case

 

ATX Full Tower
500W Power Supply
Front Panel 2 x USB2.0, 1 x Firewire
Model
Brand APEVIA
Model MX-PLEASURE-BK
Specifications
Type ATX Full Tower
Color Black
Case Material Steel
Power Supply 500W
Power Supply Mounted Top
Motherboard Compatibility Standard ATX / Baby AT / Micro ATX
With Side Panel Window Yes
Expansion
External 5.25″ Drive Bays 4
External 3.5″ Drive Bays 2
Internal 3.5″ Drive Bays 7
Expansion Slots 7
Front Ports
Front Ports 2 x USB2.0, 1 x Firewire
Cooling System
80mm Fans 1 x 80mm UV blue LED fan – front
1 x 80mm UV blue fan – front
120mm Fans 1 x 120mm UV blue LED fan – side
1 x 120mm UV blue LED fan – rear
Physical Spec
Dimensions(L x W x H) 19.00″ x 8.00″ x 21.25″
Weight 31 lbs.
Features
Features Fully loaded steel durable chassis
Ideal for small business, network server
Lockable side panel and front panel
Fold in/out case feet for case stability
Front temperature display gauge
Front fan speed controller and gauge

 

 

 

 

 

 

 

 

Sentey SS1-2421 Slim 2421 Slim Flex Case w/Power Supply LCD DISPLAY SECC 0.7mm 2x USB/1x Fan/Micro ATX-ITX

 

SECC 0,7mm / Plastic MicroATX Slim Case
240 W Power Supply
Included LCD Display
Model
Brand Sentey
Series Slim Series
Model SS1-2421
Spec
Type MicroATX Slim Case
Color
Glossy Black
Case Material
SECC 0,7mm / Plastic
With Power Supply
Yes
Power Supply BCP450-OM 250 Watt Constant/450 Watt Peak
Power Supply Mounted
Top
PSU Main Connector 20+4Pin
Motherboard Compatibility
Micro ATX / ITX
With Side Panel Window
No
Expansion
External 5.25″ Drive Bays
1
External 3.5″ Drive Bays
1
Internal 3.5″ Drive Bays
1
Hot-Swap Drive Bays 1 Sliding Bays
Expansion Slots
4 Low Profile
With front LCD display
Yes
Front Ports
Front Ports
USB 2.0 x 2 , Audio & Mic
Cooling System
80mm Fans 1 x 80mm Top Fans
Physical Spec
Dimensions(L x W x H)
15.74″ x 4.09″ x 12.79″
Weight 9.50 lbs.
Features
Features
Included LCD Display

Supports Micro-ATX / ITX

Glossy Black Painting

Slim and compact design

Supports Low Profile Cards

Included Power Supply Sentey BCP450-OM

Today’s EIO post is on products that can be used to get your kids involved in learning mechanics and strengthening their technical skills.

Pros of Getting Your Kid Involved in Do-It-Yourself Projects

Although children get the fundamentals of math and science at school, it is beneficial to reinforce this knowledge with projects that spur their enthusiasm and excitement for learning more about the way the world works.  From building blocks in kindergarten to legos in elementary school, kids have always been inclined to building things with their own hands.  With some of our products, you can continue to foster your kids enthusiasm for learning with some more advanced DIY projects.

OWI OWI-MSK613 3 In 1 Solar Stallion

This solar-powered kit helps kids understand the benefits of renewable energyEasy-to-build equine choices: ‘Horse Trainer’, ‘Pegasus’, or ‘Chariot’.
Model
Brand OWI
Model OWI-MSK613
Specifications
Type Educational Solar Kit
Features
Features Triple your fun in the sun with 3- in-1 Solar Stallion. This solar-powered kit helps kids understand the benefits of renewable energy while creating their own fun, battery-free toy. It’s exciting to watch solar energy make the product come to life, and this hand-on approach to science and building creates a tangible lesson in solar energy for girls and boys alike.

Young horse lovers will especially enjoy assembling and re-assembling these easy-to-build equine choices:  ‘Horse Trainer’, ‘Pegasus’, or ‘Chariot’.

 

 

 

 

 

 

VELLEMAN KNS10 FUEL CELL CAR SCIENCE KIT

Fuel cell that combines electrolysis and power conversion into one single device.
Model
Brand VELLEMAN
Model KNS10
Specifications
Type Fuel Cell Car Kit
Features
Features This Fuel Cell Car Science Kit uses a reversible PEM fuel cell that combines electrolysis and power conversion into one single device. Watch as oxygen and hydrogen gases are formed in two transparent water containers. The car steers independently of the user once in operation: when the car hits a barrier, it will automatically find its way by reversing away 90 degrees. This fun science kit combines cutting-edge science, education and fun for all!

  • recommended age: 14 years and up
  • this kit contains:
    • PEM reversible fuel cell module
    • car chassis & wheels
    • electric motor
    • flashing LED lights
    • water vessels
    • gas collectors
    • connector cables
    • syringe
    • battery pack for 2x 1.5V AA batteries (LR6C, not incl.)
    • user manual on CD

 

 

 

 

 

VELLEMAN KNS11 H-RACER 2.0 (IR) & HYDROGEN STATION KIT

Futuristic hydrogen car science kit is an amazing way to demonstrate the use of cutting-edge alternative energy
Model
Brand VELLEMAN
Model KNS11
Specifications
Type Hydrogen Station Kit
Features
Features This futuristic hydrogen car science kit is an amazing way to demonstrate the use of cutting-edge alternative energy and automotive technologies. Its partly transparent body displays the inner mechanics of the car. The car’s assembly instructions make it easy and fun to build, and also provides interesting education on real-world challenges.

  • recommended age: 12 years and up
  • this kit contains:
    • H-racer chassis & body
    • fuel cell system components
    • hydrogen refuelling station (2 x 1.5V AA, LR6C, not incl.)
    • solar panel & connectors
    • infrared remote control (3 x LR44, not incl.)
    • assembly & operation manual