Showing posts with label Home Appliances. Show all posts
Showing posts with label Home Appliances. Show all posts

Wednesday, January 1, 2014

If The God of Technology Made A Wish-List for New Year..


This is what it would look like. These innovations not just demonstrate brilliance in science and technology but also a social spin and street-smart attitude
Innovations of a year are worth watching not because they speak of the year gone by, but because they indicate what is in store in the coming year. That is what we had in mind when we chose this set of marvellous innovations from year 2012, which range from motion-activated screwdrivers and 3D printers to social hearing-aids and self-regulating tyres. These innovations demonstrate not just brain power but also street-smart attitude—and they promise to fulfil long harboured desires of not just high-end consumers and techies but common people as well.
World’s first motion-activated screwdriver
Black & Decker has used simple electronics to create a niche product. The 4V Max Gyro is a rechargeable motion-sensing screwdriver that can be controlled by your wrist movement. The device senses the movement of your wrists and uses that as a clue to adjust direction and speed of drilling. You need to rotate your wrist just one quarter turn to the right for forward, or left for reverse.

Inside: Its Invense ISZ-650 Z-axis integrated micro-electromechanical-system (MEMS) gyroscope designed for high performance, robustness and high shock resistance. MEMS technology makes it small enough for a compact screwdriver. Light-emitting diode (LED) lights are used to illuminate the workspace; plus an effective lithium-ion battery ensures that the device remains charged for as long as one-and-a-half year.
A factory in your garage
The MakerBot Replicator 2 is a compact desktop device that lets you print 3D objects. It works using Fused Filament Fabrication (FFF) technology. Basically, it melts plastic and squeezes it through an extruder to build an object layer-by-layer. Replicator 2 uses polylactide filament—a super-strong renewable plastic that can be used to make even movable parts and complex assemblies. The device allows print dimensions of 28.5×15.3×15.5 cm3, with a  path-breaking 100-micron resolution ensuring smooth  surfaces and fine features.

Inside: It uses modified version of Mighty Board—  MakerBot’s original 3D printer control technology—that can control up to five stepper motors with BotStep stepper controllers, two extruders (with heater cartridges, safety thermostats, thermocouples and fans), Replicator interface board and heated build platform, apart from connecting up to six end-stops. The extruder is nearly identical to the original Replicator extruder with minor tweaks to optimise manufacturing of injection moulded parts. Other features include 3-point levelling system and 32 per cent lower power consumption.

While the original Replicator design was completely open, there is a lot of furore about the company moving to a closed model now. However, the founder claims that the core technology comprising the extruder and the control board are still open. Original component information is available at http://www.makerbot.com/blog/tag/mightyboard
Translating sign language into speech
Not everybody can understand sign language – this is a practical difficulty that hearing and speech impaired people face everyday. Four students from Ukraine have developed a simple and inexpensive solution called Enable Talk comprising special gloves and a mobile application, which can detect signs made by the user wearing the gloves, and convert these into text or speech on the phone. Working on the user feedback, they are now enhancing the system to also track arm movement in addition to just fingered signs.

Inside: Eleven flex sensors and eight touch sensors embedded in the glove convert movement into proportionate electrical resistance. The glove also includes 3D digital linear acceleration sensor, magnetic sensor, accelerometer and gyroscope. An Atmel XMEGA A3 microcontroller processes analogue signals from sensors and transmits the resulting data to a mobile using Class 2 Bluetooth module (BlueCore4-Exteanl chipset from Cambridge Silicon Radio). The glove is powered by a 750mAh lithium-polymer accumulator, which can be charged through USB or built-in solar battery.

Easy and intelligent LED bulbs
You can control these light-emitting diode (LED) bulbs with your mobile phone – and no, we are not talking of complex building-wide lighting solutions. iLumi is a simple LED-based bulb that can be screwed into any common socket. It is available in small, large, white and full-spectrum models, which are supposedly super energy-efficient, last up to 20 years, and can be controlled with a simple mobile application. You can schedule the light, alter its brightness of hue, motion-activate it, and do much more. Founders Corey Egan and Swapnil Bora are waiting to finalise the design and manufacture the bulbs, which have already won numerous awards.

Inside: iLumi’s HyperLux technology allows it to be programmed to display millions of colours and makes it one of the brightest bulbs around. The bulb, which is compatible with normal sockets and power supply, includes Bluetooth, 16-bit, 256kB flash processor, additional 4-megabit flash memory, real-time lighting control for up to 100 iLumi bulbs, and clock with battery back-up. The control application is simple and intuitive, and can be downloaded and run on Android and iOS devices. The company plans to include a software developer kit (SDK), to come up with innovative ways for programming and controlling the bulb.
Tyres that pump themselves up
An under-inflated tyre can reduce mileage, increase wear-and-tear and even burst. However, during long journeys, when tyres are likely to wear out quickly, drivers are in no mood to monitor their tyre pressure. As a brilliant alternative, Goodyear has come up with a self-regulating tyre that inflates itself on-the-go. The electronics and mechanical components are built into the tyre itself, and the technology is currently being used on 100-psi, re-treaded commercial usage tyres.

Inside:
Goodyear’s Air Maintenance Technology focuses on an internal regulator comprising pressure sensors and miniature pump, completely fitted inside the tyre itself. The power for regulator functioning is drawn from the movement of the tyres. Working is simple: A sensor on the interior detects when the pressure goes low. Immediately a valve mounted on the sidewall opens up. As the tyre rotates, the vehicle’s weight compresses a tube built into the tyre’s circumference to inject air into the tyre. Once the pressure reaches the programmed psi value, the system shuts the valve and the tyre runs as usual.
A social hearing-aid that imitates functional hearing
People using hearing-aids are often embarrassed by the lack of clarity in crowded places. Two researchers at the University of Toronto have floated a start-up called Cogni-Wave to achieve what they call ‘social hearing.’ Cogni-Wave is developing a hearing-aid that uses rotating microphones to filter environmental sounds, so that the person using the hearing-aid hears exactly like someone with functional hearing—one voice at a time.

“We have a prototype that utilises Bluetooth and radio frequency (RF) wireless microphones or headphones. We have had good results but we are still adjusting parameters and the system to optimise performance. We are implementing our algorithm onto hardware, that is, chips and circuits, to speed up the processing and better incorporate it into various forms of hearing enhancement devices,” says Brian Wang, co-founder, Cogni-Wave. These hearing-aids will hopefully hit the markets by the end of 2013.

Inside: Michael Shen, co-founder, Cogni-Wave, says, “We will use digital signal processor (DSP) chips for the core signal processing of our device; the specifics of the chips would match our algorithm parameters to achieve desired results. Directional microphone and miniaturised speakers are necessary for our design, along with the circuitry components needed to amplify or filter the received and outgoing signals.”
A camera that takes ‘living’ pictures
Lytro is the first consumer camera that captures the entire light field – that is, the rays of light travelling in every direction through a scene. Earlier, this used to be done in labs with hundreds of cameras and a supercomputer to collate the images. The scientists who made Lytro have combined all that technology into one small handy camera! This means you can take ‘living’ pictures that you can interactively refocus later, any number of times. There is a special format and software bundle that let you do a lot of things with your living pictures, and also share them with others.

Inside:
Lytro’s 8X optical-zoom, f/2 lens captures significantly more light than most cameras. A micro-lens array joined to a digital image sensor records the colour, intensity and direction of the 11 million or so light rays entering the camera. Their light field engine does the work of a super-computer, by processing all the light ray information and creating images that can be refocused anywhere, anytime. Since the engine travels with every file, others can also refocus shared images. The camera comes in a lightweight anodised aluminium structure with a touch screen.
A bouncy tool for police encounters
When scouting out suspects, police and military personnel always fear the unknown—how many criminals are inside a room, whether they have any dangerous weapons with them and so on. Similarly, firefighters would like to know how intense a fire is, how many people are stuck in the accident, etc. Bounce Imaging, a throwable electronic device, aims to help in such situations by capturing images and other information using cameras and sensors, and relaying it to a mobile device.

Inside: Still in the design stage, Bounce Imaging is likely to include six wide-angle cameras (that can together give a 360-degree view), each capable of taking two snaps per second and surrounded by infrared LED flash, a protective casing that allows the device to bounce without any breakage of components, a battery, a variety of sensors such as oxygen, smoke, temperature and radiation sensors, and an accelerometer and gyroscope to orient images. The captured data is sent wirelessly to an Android-based mobile device, where an application helps analyse the information. Developers are still working on some solution (perhaps a tether or motion capabilities) to retrieve the device after it has done its job.
A robot you can ‘teach’ to pack bread
Rodney Brooks has designed a unique robot that is easy to use, comparatively cheap and suitable for even small manufacturing outfits. Baxter can perform repetitive tasks like bread packing, working safely next to people. It exhibits ‘common sense’ and is capable of sensing and adapting to its task and environment. For example, let us say Baxter is assembling a small machine and it loses a part. It will visually scan the desk, pick up the piece and start working again—just like we do. The best part is that it involves no programming or costly integration. It is possible to train the robot by physically moving its limbs and demonstrating how it should work. You can easily update its capabilities through software updates, or create your own capabilities with an easy software development kit.

Inside: Seven degrees of freedom, 8-12 pick-and-place operations per minute, 1m/s arm speed, five built-in cameras, interchangeable end-effectors, force sensing, springs and force control at each joint for free movement and bump detection, behaviour-based intelligence, vision-guided movement, human detection using front camera and 360-degree sonar, navigator and face-like display for human-machine interface (HMI), casters for movement, locking feet for stability. Full specifications and parts list available at www.rethinkrobotics.com
Car of the future
Visteon recently showed off e-Bee—a concept car created using a Nissan Leaf. It has all the automotive electronics you want to see in your car in the future – and if Visteon’s estimate is right, your car might look pretty much like this by 2020. It has everything from entertainment and mobility solutions to safety and comfort.

Inside: Boxes and boxes of electronics, including personalised HMI, touchscreen instrument panels that give information on vehicle controls and social media connections, a head-down projected main display in front of the driver, a rear view with 360-degree visibility and augmented reality features, tech-agnostic wireless charging, Open Source infotainment platform, near-field communications for personal link between the user and vehicle, climate control system, cloud connectivity and car-to-car communications for improved information about collisions, hazardous roads, curve speed warnings, traffic flow and more. Most of the technology is based on an open platform.

A mouse that fits any palm
BMW Design Works and Thermaltake have together launched the Thermaltake Tt eSports Level 10 M gaming mouse, which can apparently be adjusted to fit to any palm size. It also includes several ergonomic features including a palm-cooling design.

Inside: The mouse features a hollowed-out design that allows height and angle adjustment of the mouse body by simple turning of a screen on the top side of the mouse. A perforated palm surface, advanced materials and unique shape manage to maintain a passive airflow that removes sweat from the palms. The mouse works using a laser sensor with a sensitivity of 8200 dpi, 128kB memory, LED lighting and USB connectivity. It comes bundled with the requisite software.

Cubical display for an immersive experience
Samsung’s NL22B is a cube-shaped device that contains a transparent 56cm (22-inch) front-panel display with a computer built into the chassis. It allows images and animations to interact with the products showcased inside the cube. Apart from creating an immersive shopping experience, it could also be used in fields like education and healthcare. It might, for example, be used in a store to allow users to interactively find out more about products and try out various combinations, before making a purchase.

Inside: 60Hz transparent LED display, protective glass, speakers, security lock and cables, USB input and Ethernet connectivity. Built-in AMD A4-3310M dual-core processor allows users to easily control the display, without the need for external PC. Embedded MagicInfo Premium software enables images or videos to be played from a USB source, or deployed and managed from anywhere in the world using a network.
A wristband that tracks your life
Larklife wristbands (one for day and the other for night) track your activity, diet and sleep; analyse the information holistically; and provide personalised recommendations to improve your lifestyle. Larklife provides context-aware advice – for example, if you did not get enough sleep in the night, it will suggest you a protein-rich breakfast to ensure enough energy.

Inside: An intelligent triaxial accelerometer helps pick up even micro-movements of the user’s body, while dietary information needs to be fed into the system. Bluetooth Smart helps synchronise this information with an iOS application on your mobile device. A continuous machine learning algorithm analyses the user’s activity and learns about his energy patterns. The techniques are apparently based on the science of circadian rhythms, or how individuals’ energy levels peak and dip. Lithium-polymer battery provides up to 48-hour working. Other components include micro-USB connector, vibration motor, clock and snazzy LED lights to grab your attention.

Bandai strengthens its bond with kids
Bandai created magic with Tamagotchi as early as 1996. Its new TechPet robot dog promises to be all the more phenomenal. It starts with a simple, free iTunes application, which lets kids take care of a digital pet. You can feed it, monitor its health, give it medicines, play with it, and do much more. However, the real kick lies in the robot model or toy, whatever you want to call it. Dock your iPhone or iPod Touch as the face of the pet, and it is ready to wag its tail and play with you. The robot toy is capable of walking front and back, turning 360-degree and dancing.

Inside:
This application-based toy works with an iPhone or iPod touch docked to the robot dog through a 3.5mm jack. iPhone’s Facetime camera allows voice and gesture control. Bluetooth lets the robot interact and play with other TechPets. The robot dog is powered by three AA-size batteries.

Making electricity safe and smart
Canadian company 2D2C, which makes electrical safety equipment, has launched the SafePlug energy manager kit that adds intelligence to normal power sockets. The outlets provide child safety and surge protection, monitor power consumption of devices connected to them, automatically switch off devices not in use, and also enable remote control of the outlet. Overall, the system promises 30 per cent savings in electricity bills.

Inside:
The kit comprises SafePlug energy manager outlets, a server, an application that can run on most mobile devices and Web browsers, and SafePlug Upgrade tags. The server and outlets communicate wirelessly using Zigbee Pro—a low-power networking technology that enables the devices to connect to each other and ultimately form a mesh network. The server can, in turn, connect to the device that runs the application using Ethernet or Wi-Fi. Outlets contain patented overload, shock and power fault circuit interrupter technologies. SafePlug Upgrade tags communicate appliance power and current rating to outlets. There are around 13 tags available, and for an appliance to receive power from an outlet, it must be updated by adding the tag that best matches its power or current rating.

Google’s shot at wearable computing
Google Glass is a computer-integrated pair of glasses that realises augmented reality. That is, it supplements what you see with relevant information. If you are walking down a street, it could pop up information on the buildings there, notify you of a traffic diversion or suggest a restaurant – somewhat like today’s location-aware phones can. It is likely to be launched around 2014, but has already gained a lot of attention.

Inside: Glass is likely to include a heads-up display; standalone processor; on-board memory and battery; projection technique such as the Lumus optical engine module; a 3.2MP camera and 1080p video recording; touch pad, microphone and speakers for input-output; sensors like gyroscope, accelerometer and magnetometer (e-compass) for context-sensitivity and gesture-enabled interaction; GPS functionality; and 3G/4G, Wi-Fi and Bluetooth connectivity. It is proposed to run on Android. Although the early prototype uses an opaque screen, the actual might use a transparent liquid-crystal display or active-matrix organic light-emitting diode display.
NASA’s best Martian bet
NASA’s Curiosity is the largest rover sent to Mars. The car-sized rover apparently contains much more scientific instrumentation than other rovers sent to the Red Planet. According to NASA’s Mars Lab, the rover has everything that a living thing needs to breathe, live and work.

Inside:
The rover’s body is a structure that protects the stuff inside. Computers are its brain, and temperature is controlled through internal heaters, a layer of insulation and more. The rover’s neck and head serve as a mast for the cameras to give the rover a humanscale view; the cameras and instruments are its eyes and senses. It has robotic arms and hands to collect material samples for study, wheels and legs for mobility, batteries for energy, and ultra-high frequency antennae to communicate! One of the two computers inside the rover works all the time, while the other serves as backup. Both use radiation-hardened BAE RAD750 microchips operating at up to 200 MHz. Each computer is equipped with 2GB flash memory, 256MB random-access memory and 256kB erasable programmable read-only memory. While this configuration seems much lower than today’s computers, these chips are used because they are radiation hardened, through a very high-tech and costly process to stand the rigours of a strange planet.

Saturday, December 21, 2013

Low-cost Touch Sensitive Switch

Low-cost Touch Sensitive Switch

While experiment with a high gain transistor it may be noticed the transistor gets saturated by just touching its base. Here is a single, low-cost touch switch based on this idea. The 50Hz hum present in our body is the key of this circuit.

BEL BC557B pnp transistor has been chosen for this circuit. All the transistors used in this circuit are of pnp type. The circuit is basically a RS flip-flop formed by T3 and T4. Set and reset inputs are buffered by T1 and T2. Set and Reset inputs are buffered by T1 and T2. On switching the power supply on the bases of T3 and T4 become positive simultaneously. But due to slight difference in characteristics of T3 and T4 (since it is not possible to make perfectly matched transistor) one of the transistor become unsaturated. Transistor T5 is used as relay driver transistor.
circuit diagram of low cost touch sensitive switch

PARTS LIST

Resistors (all ¼-watt, ± 5% Carbon)
R1, R3, R6, R7, R9 = 10 KΩ
R2, R4, R5, R8 = 220 KΩ

Semiconductors

T1 – T5 = BC557B
D1 = 1N4001

Miscellaneous

RL1 = 12V/200Ω relay
Touch plate



Friday, December 20, 2013

Automatic guest detector with electronic eye


Electronic eye:


Electronic eye has much use in this electronic age. Also Known as magic eye. It can be used as an automatic guest indicator at the door, If fitted on the bottom of the door entrance. Once it is installed at the door there is no need to install a call bell. It can also be used at homes or in banks as a burglar alarm.
Electronic Eye Circuit Diagram
Circuit Diagram of Electronic Eye
     Fix the LDR to the wooden door or a locker to be protected in such a manner that when anybody tries to open it, a shadow falls on the LDR and the circuit gets activated and produce a pleasant sound through the buzzer.
This electronic eye circuit uses NOT gate from CMOS I.C CD 4049. CD 4049 contains 6 independent NOT gate in one package; we have used here (a) one only. NOT gate output goes high(1) when the input pin 3 is at lower then 1/3rd level of the supply voltage. Conversely the output goes low (0) when it is above 1/3rd level. So small change in the voltage of pin-2 is enough to change the level of output (pin-3) from 1 to 0 and 0 to 1. The output has only two states high and low and can not remain in any intermediate stage. It is powered by a 9V battery for portable use. The circuit is economic in power consumption. Pin 1 is connected to the positive supply and pin 8 is grounded.
To detect the present of an object we have used LDR and a source of light. LDR is a special type of resistance whose value depends on the brightness of the light which is falling on it. It has resistance of about 1 mega ohm when in total darkness, but a resistance of only about 5k ohms when brightness illuminated. It responds to a large part of light spectrum.
We have made a potential divider circuit with LDR and 220 KΩ resistance connected in series. We know that voltage is directly proportional to conductance so more voltage we will get from this divider when LDR is getting light and low voltage in darkness. This divided voltage is given to input of NOT gate.
As soon as LDR gets dark the voltage of input not gate drops 1/3rd of the supply voltage and pin 2 gets high and LED or buzzer which is connected to the output gets activated.
 Advantage of using Logic gate is that data can be easily send to other digital interface device ie one can easily fed data to computer using parallel port or for further processing .

Thursday, December 19, 2013


Automatic Fan Controller

Hear is a simple Circuit to automatically switch ON and control a speed of a Fan. For the simplicity of the circuit  we have not included control to threshold level.


























                                         Circuit Diagram of Automatic Fan Controller
Working: this project uses IC LM35 as a sensor for detecting accurate centigrade temperature. Output voltage of this sensor is linearly proportional to the Celsius (Centigrade) temperature. This sensor use the fact that- as temperature increases, the voltage across a diode increases at a known rate. Output of IC is 10mv/degree centigrade for eg if temperature is 45 degree then the output of sensor will be 450mv or 0.45V
 Output data of sensor is applied to a current amplifier circuit and feed to a low power DC motor. We have made current amplifier by using a general purpose NPN transistor. I have used BC548 as shown in the circuit diagram. If you are using other NPN transistor then make sure about pin configuration. Transistor will start conducting when base voltage reaches to 0.40 V (40 Degree). You will see fan start to rotate  and at 0.60V (60 degree) it will be at full speed. At this voltage transistor is fully  conducted means resistance is low .
Part List:
IC LM35, Any general purpose NPN Transistor eg BC548, Low power DC Motor you can easily get from old thrown DVD Player or Tape Recorder, small fan Blade, 10 Ohms or 4.7 ohms resistance, battery etc

Clap Switch to ON/OFF electrical appliances


Clap Switch to ON/OFF electrical appliances


  Here is a Hobby Circuit for electronics hobbyists that can switch on & off a light, Fan, Radio etc. by the sound of clap. The sound of clap is received by a small microphone that is shown biased by resistor R1 in the circuit. The microphone changes sound wave in to electrical wave which is further amplified by Q1. Transistor Q1 is used as common emitter circuit to amplify weak signals received by the microphone. Amplified output from the collector of transistor Q1 is then feed to the Bistable Multivibrator circuit also known as flip-flop circuit.
    Flip flop circuit is made by using 2 Transistor, in our circuit Q2&Q3. In a flip-flop circuit, at a time only one transistor conduct and other cut off and when it gets a trigger pulse from outside source then first transistor is cutoff and 2nd transistor conducts. Thus output of transistor is either logic-0 or logic-1 and it remains in one state 0 or 1 until it gets trigger pulse from outer source.
    The pulse of clap which is a trigger for flip-flop which makes changes to the output which is complementary (reverse). Output of flip-flop which is in the low current form is unable to drive relay directly so we have used a current amplifier circuit by using Q4 which is a common emitter circuit. Output of Q4 is connected to a Relay (Electromagnetic switch) which works like a mechanical switch and it becomes easy for connecting other electrical appliance.
    The relay contact is connected to the power line and hence turns on/off any electrical appliance connected all the way through relay.
Clap Switch
Picture of Clap Switch Project
Clap Switch Circuit Diagram
Circuit Diagram of clap Switch
         Clap Switch Part List:- 
Resistors
R1=15KΩ, R5,R6=1.5KΩ
R2,R11,R12=2.2MΩ, R13=2.2KΩ
R3=270KΩ, R4=3.3KΩ
R7,R8=10KΩ, R9,R10=27KΩ
Capacitors
C1=1000µf/16v
C2=.01µf,C3,C4=.047µf
Semi Conductors
Q1,Q2,Q3= BC548
D2,D3,D4= IN 4148
D1,D5=IN 4007, Q4=BC368
Misc
T1=12v/500mA Transformer
Mic= Condenser Microphone
K1= 12V Relay, B1= Bulb or Load

Wednesday, December 18, 2013

Laser Security System



A really easy and cool electronics project and lots of fun to play with once it finished.Its basically a laser tripwire but has a large application quotient in our everyday life's! so all you teenagers and mad scientists go out there and make your rooms and labs intruder proof :D 

PARTS REQUIRED:
• Breadboard / Perf-board
• Transistor- BC 109 (or any equivalent general purpose NPN transistor)
 
link to the datasheet of BC109 :
http://alltransistors.com/pdfview.php...
• Wires for connecting
• 9 volt battery
• 9 volt battery clip
• 10k ohm resistor
• LDR- mine was 8k ohm

HOW THE CIRCUIT WORKS:
This electronic circuit uses a transistor to detect light falling on the LDR (light dependent resistor) to activate or deactivate an alarm (or any kind of electronic component). The two resistors (the resistor and the LDR) are connected in series and the common point between them is connected to the base of the transistor, making a potential divider. It uses the property of "threshold voltage" of the transistor to trigger the alarm. This means that we can set a minimal amount of light intensity to trigger the alarm. I have set it to the intensity of sunlight as the minimal. This means that, it won't trigger indoors in ambient light but only when there is a light of high intensity (like a laser). To set your own intensity or if you don't a LDR that is working with the current specifications then just replace the resistor with a potentiometer (or other kind of variable resistor) of something like 30k ohm. Then keep changing the value until you get the desired result.
A more scientific method will be to see the reading (resistance) of the LDR in the desired light. Check the threshold voltage from the datasheet and then used the potential divider formula to calculate the required resistance of the 2nd resistor.
 

Note: The relay is only used for simplicity. The output can also be controlled by power transistors, to control any other device.