Electronicsunit Blog

107.29.09 Nissan Has Gone Ahead In The World

to Battery, Electric Motor — Tags: ,  

“Nissan will be a leader in zero-emission vehicles,” Chief Operating Officer Toshiyuki Shiga said ahead of a test-drive event at the automaker’s facility in this Tokyo suburb. “EV is the answer.”

YOKOSUKA, Japan: Nissan Motor Co. showed off its super-quiet, zero-emission electric car on Monday – a key green offering for Japan’s No. 3 automaker, which has fallen behind in hybrid technology.

Nissan showed the prototype in a Tiida compact that is already on sale.

The platform will be incorporated into a new vehicle body that will be unveiled at the beginning of August. It consists of a highly rigid body (designed to reduce vibrations and increase the car’s durability), an electric motor, and a lithium-ion battery pack built into the floor of the car so that it doesn’t eat into cargo space. The production version of the vehicle will go on sale next year, the company says, and get 160 kilometers–100 miles–on a charge.

Latest Nissan Electrical Car

Latest Nissan Electrical Car

Nissan said its intention is to create an all-electric vehicle that can be driven “24/7,” and to support that has developed an EV-IT system that connects the vehicle, through an on-board transmitter, to a global data center. Drivers will be able to check the state of charge of their vehicles online and by cell phone, and the car’s navigation center will calculate driving radius and capability of reaching a selected destination based on the current state of charge. It can also tell the driver where the closest charging stations are.

Another interesting function is a remote-controlled timer that lets the air-conditioning be turned on to “precool” the vehicle while it’s plugged in during charging to save battery use. The remote function also lets the driver tell battery charging functions to start and stop at specific times.

More details are expected at the August 2 event.

 

 

107.28.09 Battery—Life Necessities

to Battery, Storage Battery & Charger — Tags: , ,  
The world is becoming more and more colorful since the advent of battery. Look at our daily life, can we live without battery? Of course not!
charger01

charger01

Currently, the electronics require a large amount of energy to operate. And to meet this voracious consumption, nothing is more practical than dry batteries and batteries charger. When the energy ends, you simply take your rechargeable dry battery and put it in the charger and that’s it: it is ready to be used again. In addition, rechargeable dry batteries last more than common dry batteries -from 2 to 4 times. And they have been developed to be used in equipments such as digital cameras, some GPSs etc..

charger02

charger02

And the industry of battery manufacturer has bright prospects for the future. It is reported that India’s leading dry cell battery manufacturer Eveready Industries is eyeing a growth of 10 percent in 2009-10.

Referred to dry cell batteries, they are common things in our daily lives. I would like to remind everyone to pay attention to the classification of used batteries. I think we’d better choose to use rechargeable batteries. It is economical and environmentally friendly.

charger03

charger03

What are the kinds of charger?

There are various types and capabilities in the market. The charger is connected to the type of batteries for which it was designed. Most of the dry batteries are rechargeable NiMH (nickel-metal hydride). Until recently, it was also common in NiCd batteries (nickel-cadmium). The NiMH offers a much larger capacity, and it can be found in both small size (AA) and (AAA).

How do I choose a charger?

The correct choice of the charger is very important to the health of rechargeable batteries. It must be compatible with the carrying capacity of the battery. Give preference to the acquisition of the charger / battery together, as a charger with different time load cell can damage it.

007.28.09 A Generalist Called PLC

to Electrical Control System — Tags:  

In our electrical engineering and automation field, there is a good tool for us called PLC. It is more convenient for us to develop a control system with it. In fact, it can play a role in all fields.

A PLC (Programmable Logic Controller) is a device that was invented to replace the necessary sequential relay circuits for machine control. The PLC works by looking at its inputs and depending upon their state, turning on/off its outputs. The user enters a program, usually via software, that gives the desired results.

A PLC consists of following main parts:

Main Parts Of A PLC

Main Parts Of A PLC

What is a PLC input/output?

Inputs/Outputs

Inputs/Outputs

PLCs are used in many “real world” applications. If there is industry present, chances are

PLC Control Panel

PLC Control Panel

good that there is a plc present. If you are involved in machining, packaging, material handling, automated assembly or countless other industries you are probably already using them. If you are not, you are wasting money and time. Almost any application that needs some type of electrical control has a need for a plc.

For example, let’s assume that when a switch turns on we want to turn a solenoid on for 5 seconds and then turn it off regardless of how long the switch is on for. We can do this with a simple external timer. But what if the process included 10 switches and solenoids? We would need 10 external timers. What if the process also needed to count how many times the switches individually turned on? We need a lot of external counters.

As you can see the bigger the process the more of a need we have for a PLC. We can simply program the PLC to count its inputs and turn the solenoids on for the specified time

007.27.09 Yes, we can see that!

to Electrical Control System, Telecommunication & Broadcasting — Tags: ,  

Have you heard the America’s SGIG program(Smart Grid Investment Grant program), and what do you think of today’s electrical control system, how does they work, communicate and monitor with each other.

Currently, the satellite communication technology has play a great role in the world, so the U.S department of energy put forward the SGIG program to encourage high-tech industry to improve power grid monitoring system of the country.

satellite-based power grid control and monitoring system.

satellite-based power grid control and monitoring system

The overall purpose of the SGIG program is to accelerate the modernization of the nation’s electric transmission and distribution systems and promote investments in smart grid technologies, tools, and techniques which increase flexibility, functionality, interoperability, cyber-security, situational awareness, and operational efficiency. The products developed must be marketable and deployed on a commercial scale.

It is reported that AML Communications’ wholly owned subsidiary Mica-Tech, Inc. has filed a letter of intent with U.S. Department of Energy, stipulating that Mica-Tech intends to apply for a matching grant of up to $2 million under the Smart Grid Investment Grant program to develop satellite-based power grid control and monitoring system.

electrical control system

electrical control system

More attention and more investment, we can see a bright future of the new concept of electrical control system.

007.27.09 I don’t care!

to Telecommunication & Broadcasting — Tags: ,  
CDMA VPN ROUTER

CDMA VPN ROUTER

Recently, there is a shocking news that appeared in major media headlines: Korean antitrust authorities slapped unprecedented heavy fines totaling 260 billion won ($208.7 million) on Qualcomm Inc. for violation of local competition laws. The San Diego-based company that holds key patents to CDMA ? or code division multiple access standard, which supports virtually all Korean-made wireless chip sets ? was accused of abusing its dominant market position to engage in unfair market practices.

 

This is really a shocking news both to us and Qualcomm, the world’s largest developer of CDMA. So what is the giant’s reflect, “give money without saying a word”. That’s impossible, They will make use of legal means confrontation with the Korean authorities.

It is clear that no matter who won the final, the result will lead a big change to the South Korean’s CDMA market.

CDMA Mobile Phones

CDMA Mobile Phones

Actually as a CDMA mobile user, I don’t care about the result who will win in the end, but I am looking forward to wireless communications products, mobile phones more powerful, more convenient to use!

207.24.09 Why Real Estate Near The High-Voltage Substations Are So Cheap?

to Power Transmission & Transformer — Tags: ,  

If you are concerned about the price of real estate, you may find some suites are much cheaper than others. So why? One reason maybe that they are close to a high-voltage substation.

You know there is a old Chinese saying: “There’s no such thing as a free lunch.” If you want to buy a flat like that, you must make sure that it does no harm to you!

A high-voltage substation must contain many high-voltage equipments, such as transformer, Converter, High Voltage Transmission Lines and so on. Besides high-voltage may produce electromagnetic radiation around.

Attention! it does harm to our body. Now let me tell you some hazards to human by High-voltage substation’s electromagnetic radiation:

Transformer

Transformer

  1. It is very likely one reason that children suffer from leukemia.
  2. Able to induce cancer and accelerate the proliferation of human cancer cells.
  3. Affect the reproductive system.
  4. Can lead to missing children’s intelligence.
  5. The human visual system is affected.
  6. Noise pollution.
  7. Fire and explosion.
  8. High lighting hazard areas.
  9. The leakage of toxic chemicals.

Oh, my God! How dare a person live in such houses, at least not me!

007.24.09 Give you a PCB amateur’s production by the indigenous law

to Circuit Board — Tags:  

Hardware:

1. A print-output device used to produce plastic high-precision solder layer of toner, such as a laser printer or a photocopying machine (copier, then the need for the original copy, the original ink-jet printer can print out).

2. An electric iron.

3. A smooth stickers at the end of Backing Paper.

4. A certain amount of ferric chloride etching solution, according to the size of the board. Added that it is better to have a digital thermometer ranged from 0~200 degrees.

Software:

Low version of PROTEL, such as PROTEL2.5, or PROTEL99SE.

2

One Kind Of PCB Board

Steps:

1: Using a software mentioned above to generate a number of image files, for example, you can organize SCH with low version PROTEL, then generate the corresponding PCB map using network table, or directly using PowerPCB figure PCB, for printing.

2: The PCB plans to print to heat transfer paper.

3: Put the well printed PCB heat transfer paper flatly on the CCL, prepared for transfer.

4: Heating with electric irons, pressure the black plastic powder of the transfer paper on CCL to form high-precision layer to prevent corrosion.

5: The success of iron transfer pressurized heating effect! If you engage in regular, skilled, it is very much easier.

6:Prepare ferric chloride to go on corrosion.

7: Careful! not to over-corrosion, when corrosion is of the end, get ready to weld.

8: Load the milling cutter to the bench drill, clean up the part of the pad, and the remaining part is for solder.

9: Install scheduled parts and weld.

Notes:

1.Do not make the iron too cold or overheated, the best temperature is between 140 ~ 170, within this temperature range, plastic toner transfer characteristics is the best.

2.Open the transfer paper when temperature is lower, slowly open, if you find there was not any good part of transfer, cover it again with heat transfer of pressurized heating.

3.If there is still some problems of some part (such as broken), please use oily carbon pen, nail polish, or paint to remedy, but this situation is not much.

007.23.09 Li-ion Battery, Good Choice For Hybrid Vehicles

to Battery, Storage Battery & Charger — Tags:  

Tokyo (AP) — Japanese electronics maker Hitachi Ltd. said Thursday it will supply lithium-ion batteries for hybrid vehicles to General Motors Corp in 2010 and sharply raise production capacity to meet surging demand for gas-electric cars.

A hybrid vehicle is a vehicle that uses two or more distinct power sources to move the vehicle. The term most commonly refers to hybrid electric vehicles (HEVs), which combine an internal combustion engine and one or more electric motors.

Ford Escape Hybrid the first hybrid electric SUV and first hybrid electric vehicle with a flexible fuel capability to run on E85

Ford Escape Hybrid the first hybrid electric SUV and first hybrid electric vehicle with a flexible fuel capability to run on E85

A hybrid electric vehicle (HEV) is a hybrid vehicle that combines a conventional propulsion system with a rechargeable energy storage system (RESS) to achieve better fuel economy than a conventional vehicle. Its secondary propulsion system, additional to the electric motors, means that it does not require regular visits to a charging unit as a battery electric vehicle (BEV) does.

Toyota Motor Corp.’s hybrids now use nickel-metal hydride batteries. The world’s largest automaker said last month it will use for the first time lithium-ion batteries for its plug-in hybrid cars.

So the question is, what makes these batteries so energetic and so popular?

Lithium-Ionen-Accumulator

Lithium-Ionen-Accumulator

Lithium-ion batteries are popular because they have a number of important advantages over competing technologies:

  • They’re generally much lighter than other types of rechargeable batteries of the same size. The electrodes of a lithium-ion battery are made of lightweight lithium and carbon. Lithium is also a highly reactive element, meaning that a lot of energy can be stored in its atomic bonds. This translates into a very high energy density for lithium-ion batteries.
  • They hold their charge. A lithium-ion battery pack loses only about 5 percent of its charge per month, compared to a 20 percent loss per month for NiMH batteries.
  • Lithium-ion batteries can handle hundreds of charge/discharge cycles.

Using a lithium-ion battery will produce more energy, allowing hybrid cars to run more as an electric vehicle, but there have been some technological hurdles.

007.23.09 Self Drive Tour South Africa

to Telecommunication & Broadcasting — Tags: ,  

The self drive or FIT (Flexible Individual Travel) tour option is one of the most cost-effective ways to tour this fascinating region of Southern Africa. Tour South Africa and the region at your own pace with a large degree of flexibility. You can choose the type of car for hire, the standard of the accommodation, the time of the year to visit, the duration of your self drive tour, which regions and most importantly, you can select a tour itinerary that fulfills your personal interests. A tour that can include – wildlife, nature, culture, history, sightseeing, bathing, sport, adventure or just a little bit of everything. all Selfdrives inbound tours are BONDED through SATSA offering you greater security and protection.

Beautiful Scenery

Zoo-Free Driving Areas

Zoo-Free Driving Areas

The most important aspect of a tour to South Africa or Southern Africa is the planning and it is therefore pretty handy to have someone like us on your team, that has the experience, expertise and knowledge of the region.

Attention: If you would like to go on a Self Drive Tour, you may do some preparation first. Such things you may have to prepare besides you have already owned a good car such as SUV or MPV, they are commodities, drugs, clothes, vehicle accessories and don’t forget the Car GPS Navigation!

Now let me introduce several GPS systems to you:

1. Navigon 7200T

The Navigon 7200T offers an attractive design and plenty of features, including voice address entry, 3D landmark renderings, text-to-speech functionality, and integrated Bluetooth. The user interface and maps still aren’t as clean as a Garmin or a TomTom, but performance has improved and address entry by voice can be quite accurate with some training

Navigon 7200T

Navigon 7200T

2. Magellan Maestro 4370

Despite a couple of minor performance issues, the Magellan Maestro 4370 offers convenience through its new OneTouch interface, providing you with quick one-click access to your preferred destinations. The GPS also delivers with features and accurate directions.

Magellan Maestro 4370

Magellan Maestro 4370

3. TomTom ONE 125-GPS receiver

The TomTom One 125 isn’t the newest or flashiest portable navigation device on the market, but that’s OK. Not everyone needs the latest or greatest. What the One 125 offers is a solid, entry-level GPS for first-time buyers or for those looking for the most basic navigation functions.

TomTom ONE 125 - GPS receiver

TomTom ONE 125 - GPS receiver

007.22.09 Without step motor, Optimus Prime is just a pile of scrap metal

to Electric Motor — Tags:  

Hello everyone! Have you seen the film Transformers: Revenge Of The Fallen. If you have seen it, may I ask you a question: What do you think of Optimus Prime ? First I tell you my answer: I think he is a man with great power and justice.

But don’t forget he is a robot, he is made up of different parts. and if he wants to move freely, one thing is indispensable, that is step motor .

A stepper motor is an electromechanical device which converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence. The motors rotation has several direct relationships to these applied input pulses. The sequence of the applied pulses is directly related to the direction of motor shafts rotation. The speed of the motor shafts rotation is directly related to the frequency of the input pulses and the length of rotation is directly related to the number of input pulses applied.

Optimus Prime

Optimus Prime

So I have just tell you what is a step motor, now I will tell you why does Optimus Prime can not live without the little things. Look at the picture, you can find there are a lot of joints on his body. The joints can make he move, jump and fly freely. The most important is that one part of a joint is step motors.

step motor 1

step motor 1

Now let’s look at the advantages of it:

1. The rotation angle of the motor is proportional to the input pulse.

2. The motor has full torque at standstill (if the windings are energized)

3. Precise positioning and repeatability of movement since good stepper motors have an accuracy of 3 – 5% of a step and this error is non cumulative from one step to the next.

4. Excellent response to starting/stopping/reversing.

5. Very reliable since there are no contact brushes in the motor. Therefore the life of the motor is simply dependant on the life of the bearing.

6. The motors response to digital input pulses provides open-loop control, making the motor simpler and less costly to control.

7. It is possible to achieve very low speed synchronous rotation with a load that is directly coupled to the shaft.

8. A wide range of rotational speeds can be realized as the speed is proportional to the frequency of the input pulses.

Turn to the next topic, now you may ask if I want to make a robot or other thing, when do I need step motors, so let me tell you briefly:

step motor 2

step motor 2

A stepper motor can be a good choice whenever controlled movement is required. They can be used to advantage in applications where you need to control rotation angle, speed, position and synchronism. Because of the inherent advantages listed previously, stepper motors have found their place in many different applications.

Page 4 of 5«12345»