How to prevent your children from getting worse eyesight

Currently, myopia has become the primary reason for decreased vision in adolescents. The incidence of adolescent myopia increased year by year, while the age was getting younger year by year. Prevention and control of juvenile myopia have become an important global public health problem. Recently, an Australian scholar published a report saying that the prevalence of global myopia in 2000 was 22.9%. It is estimated that by 2050, myopia will comprise 49.8% of the global population. In other words, about half of the world's population will be myopic in 2050. This important data finding warns us that we should pay more attention to young people's vision problems and prevent vision loss as soon as possible.

No one wants to have poor eyesight since childhood and have to wear a glasses all the times. However, nowadays, children are addicted to computer games or mobile phones which will hurt their eyes. If your children also love to watch computer or mobile phone, these things might be helpful.

Anti Blue Ray Glasses

This great invention if from xiaomi. Xiaomi Roidmi B1 Anti Blue Ray Computer Glasses can block 35% harmful blue ray rate with the modern and fashionable look. Wear resistance, scratch resistance, folding resistance and oil pollution prevention, the Anti Blue Ray Glasses is ultra light in only 21g. There are three colors to choose. Personal, I do feel much comfortable by wearing this blue ray glasses when staring at my computer display for 8 hours in my workday.

Better TV display screen

No matter what, watching TV is less harmful than computer and mobile phone to the eyesight. When your children need some entertainment, choose the TV. The xiaomi tv 3s 43-Inch 1920x1080 Full HD will offer you the most relaxed, clear and comfortable viewing experience. With independent Bluetooth antenna, which can connect up to 15 devices like Bluetooth remote control, mouse, keyboard, headphones, audio, and other wireless devices, you can recommend your children to play the computer games or watch movies through the display screen of the xiaomi mi tv 3s.

Make your own Arduino Board- DIY instructions for Beginners (part 2)

When you get your Arduino control panel, you first thing you need to do is to install the driver on your computer so that you can experiment with it. All kinds of practical operations and experiments should base on this. This will require you download the Arduino IDE to your computer (the IDE is Arduino's software development environment, whether Mac, Windows, or Linux). If you can not find the download address, you can comment below and I will offer you some guidance. Then, you need to purchase some Expansion Boards online, for rc drone controller, you might need the bluetooth module and the GPS module, for example.

Steps to prepare an Arduino Board:

1. Socket attachment

The first step would fix the socket seeing that it is fixed to the notch of the perf board. You can drill and create a larger notch on the board. You could also get an Amplifier Board or ICD Controller board. The Bluetooth power amplifier board is suitable for all small bluetooth speakers. The lcd controller board is compatible with Notebook, host computer, monitor, VGA, host DVI, Xbox/PS3/PS4, raspberry pie signal interface and so on.

2. Add a 5V and 3.3V Regulators

By holding the 7805 printed side down fix the 5 V and 3.3 V regulators using the decoupling capacitors. The 3.3V do not have the same pins as in 7805; hence make sure to keep the print sides towards you.

3. Indicator LED

Connect the LED to the output of 7805 regulators to indicate the power. Connect the anode to 150-ohm resistor and connect the resistor to the output of 7805. Plug in and make sure everything is fine.

4. Connect the power and ground pins

Connect the pins 7, 20 and of 5 volts; 8 and 22 to ground.

5. Reset Button

Take a pin to connect to 10k and then to 5v continuously connecting to the bush button to pin 1 along with other to ground.

6. Add on crystal oscillator

Connect 16 MHz oscillators to pins 9 and 10. After this connect the 22cp to pin 9 with other ends to ground. Repeat with pin 10.

7. LED on Pin 13

Connect red to pin 19 and cathode to 150-ohm resistor.

8. Female Headers

Label them all to avoid confusion and connect them to respective pins and make sure to be tedious.

9. Other headers

Connect the 6 male headers opposite to the power jack as given.

10. Use an Arduino Uno to program

You just need to prier the chip to Arduino board while off and you can replace the chip.

Make your own Arduino Board- DIY instructions for Beginners (part 1)

Many people are interested in an Arduino box and doing exciting stuff with it. Some of you might be interested in preparing an Arduino board yourself. Well here are some DIY instructions for you so that you can work and create your own system. Some starter readers may wonder what the differences between Arduino Boards and Arduino Shields and what their respective uses are. In short, arduino board is the master chip, and the shield is an extended board. The former is responsible for the operation, and the latter is for some special functions. For example, the role of the music shield is to provide the function of playing music. There are other Expansion Boards that we will talk about in the following paragraph.

The cost of all the arduino starter kit is very less and easily available in the market. You can find all kinds of the arduino starter kits on the online store which are quite affordable and can basically meet all your entry demands with so many different parts and components to choose. There is no requirement of a board; you just need an Atmega chip as a main piece for the project unless you are interested in Arduino Nano (the arduino nano can be said as a prebuilt board). It is easy if you need to add more boards to your existing Arduino board. The serial connected to USB adapter chip can help the microcontroller to interface and connect to your computer. Let’s see how the process can be completed easily! Here is just an example of a basic starter arduino kit that I randomly found online, and you can choose whichever you like.

Materials available in a Starter arduino kit 

· A Prefboard

· 7805 V regulator (5V)

· LM1117T3.3 V Regulator (3.3V)

· 10uf electrolytic Capacitors - 2

· 10uf tantalum Capacitors - 2

· Green and red LED

· 150 ohm resistors - 2

· 10 K resistor

· Ceramics disk capacitors- 22pf - 2

· Ceramics disk capacitors - 0.1uf

· Crystal oscillator- 16 MHz

· Push Button Switch

· Jumper wires

· Female Headers

· Female wall wart power jack

· Male headers - 6

· Bootloader - Atmega328

· 28 pin DIC IC Socket

Batteries, their chargers, and specifications

With the modern technology, most household items use different types of battery-powered devices to make them function effectively. Batteries classified as 18650 have many uses on different types of devices ranging from flashlights to laptops. Although they usually have the same shape as AA batteries, these lithium-ion batteries are larger and have a wide range of uses, the most common being their use to power up flashlights. These batteries can also be used to power up window solar systems that can charge household gadgets, as well as mini cameras and Li-ion chainsaws, which uses a pack of these batteries. Lithium-ion polymer batteries, on the other hand, are rechargeable and use polymer electrolytes rather than liquids ones. Some of their uses include use in household gadgets like mobile phones and tablets, powering hybrid vehicles and used in aircrafts as well as trains.

The 18650 battery charger

The 18650 battery charger has many features that ensure it functions as it should. Some of them include ease of use and compatibility with a variety of products. It works as a power bank for devices like iPhones, Samsung Galaxy phones, Motorola phones and Sony phones among others. It can also charge the 18650 battery that power it. All these give users different types of uses making it a valuable product to have. These batteries also come in different colors and have an input of up to DC 5V.

The lipo battery charger

The lipo battery charger also has its share of features that users can benefit from. They have individual cell balancing, a wide range of charge currents and delta peak sensitivity. These microprocessor-controlled chargers can also store data and monitor their voltage. However, their functionality has a time constraint. With a maximum of 50W charge capacity and current ranging between 1-5.0A, this is a product that will meet all your needs. The battery strap from Eachine, for example, is a high-quality product as attested by customers who have used it. It has a strap capacity of up to 5 batteries and comes in a length of 22.3cm. This gives makes it spacious enough to function as it should without any problem.

All these products are amazing and can help you save a lot of money since you can use each of them in a variety of devices. They don’t consume a lot of power, helping save the energy and are very affordable. Customers who have used them have given positive reviews with most using terms such as amazing, awesome and quality products. All these show that purchasing any of them will give you value for your money.

Tools That Satisfies DIY Lover’s Requirements

Knowing how to do things yourself is an incredible approach to spare cash and it implies you less dependent on repairmen and purchasing costly substitutions. The increment in your DIY learning for nothing with these convenient assets. Expanding your DIY aptitudes is an extraordinary approach to diminish the measure of cash, you spend paying other individuals to assemble and repair things for you. You don't need to submit yourself to a profession as a jack of all trades or join an exchange association to get long lasting DIY abilities. You can locate an assorted and wide pool of learning openings in your nearby group and a considerable lot of them are accessible for nothing or efficiently. Peruse the accompanying rundown to discover a strategy that works for your calendar and spending plan.

There are some tools that can assist you in your DIY activities:

3D Printer

The 3D Printer development is engaging individuals around the globe to make things for themselves. Practical things, lovely things, or whatever you like just make the best use of your imagination. That is the delight of 3D printing. You can customize, modify and change any piece of anything to fit your needs by using some 3d printer parts and materials.

• Be an innovator. Transform your thoughts into usable parts and instruments in a matter of hours.

• Solve your own particular issues by making one of a kind physical outlines.

• You can print whatever structure you wish, however, unpredictable.

• It's naturally cordial utilizing 90% of the crude material, making beside no loss by any means.

Leather Craft Tools

Leather craft tool is an amazing and high power machine that is just made to produce maximum benefits in a brief timeframe. People can utilize all kinds different sizes of the leather craft tools for gift purpose also. It is awesome if you make your own gift. It is also less expensive than purchasing everything independently, as we all know. Leather made products on the market are not cheap. This leathercraft tool is a phenomenal approach to begin any DIY craft. This tool has all you have to make for proficient leather items at the art level.

Soldering Iron

The utilization of electric soldering iron is regular in the market for gadgets and gems making. Soldering iron tends to discover use in pipes. Utilizing the previous welding iron sort requires little as expertise, and basic guidelines do the trick to kick a great many people off. Soldering irons can easily keep up consistent warmth levels, guaranteeing that clients don't wind up consuming surfaces they work with, and the soldering station will also protect your work table. The accessibility of various types of solder tips guarantees more exactness because commonplace gas-controlled irons offer little as artfulness. Furthermore, when you search for soldering iron options, the accessibility of various wattage and warmth setting choices is a clear in addition, given that this offer expanded flexibility.

Future Home: smarter and smarter

Have you ever dreamed of your future home? How is it like? Will it be just like the home from the fiction movie that is full of smart devices like AI or RC controller? In fact, it might not be just a dream. Technology is developing every day rapidly and more and more smart gadgets like the smart remote controller or wireless smart plug have been invented to improve our life convenience. Let’s have a look at some smart gadgets that might achieve your dreamlike smart home.

1. Smart remote controller

The xiaomi smart remote controller is an 'universal' remote control that it can replace the remote control of an ordinary home appliance, such as air conditioning, TV, set-top boxes, amplifier, and speakers. Besides, it can also replace the infrared transmission remote control and also supports remote control and remote operation APP. Simply put, that is the one can put all of the remote control of your family appliances into one, using this remote control can remote control all home appliances so easily.

2. Mini Intelligent Wifi Router

The xiaomi pocket router is the mainstream of dual-band AC intelligent routers and has been praised in the industry as the cost-effective champion. 3 times faster! Support for the latest 802.11ac protocol, transmission rate up to 1167Mbps. A key switch, the metamorphosis of universal relay let home WiFi coverage without a dead angle. It is also a dual-band AC 2.4GHz/5GHz router which can be an intelligent home controller center to operate all the smart home appliances.

3. WiFi Wireless Remote Control Smart Socket

The xiaomi wifi plug can be controlled by the xiaomi APP and can be said as the world’s smallest smart socket with 3C certification. The xiaomi smart wifi plug with standard 5V/1A USB interface supports timer function.

4. Smart 4 Antennas WiFi Router

The xiaomi mi router is the mainstream of dual-band 2.4GHz/5GHz AC intelligent routers offering 3 times faster speed than traditional wireless routers, supporting the latest 802.11ac protocol, up to 1167Mbps total bandwidth, 300Mbps in 2.4G and 867Mbps in 5G. The 4 pcs real 2X2 dual-band AC antennas, cover wilder, and as an intelligent home controller center to operate all the smart home appliances. 7 sets of protection, more secure to protect your exclusive WiFi zone and etc. Creative, direct and swift connection give you the best experience.

YG-300 review: 2017 best cost-effective projector

Many of our readers have asked me to recommend an affordable projector for them since the projector at home does not have to be that expensive and professional and what they need just to satisfy their watching needs. In most of this kind of situation, I will always recommend the YG-300 LCD Mini Portable LED Projector which can be said the highest cost-effective projector these years. What is also amazing is that all the feedbacks about this portable led projector are 9/10 or 10/10 good reviews.

Let’s go check it out why can this portable led projector satisfy its customers so well.

Description:

YG-300 LCD Projector is a multimedia player with 320 x 240 pixels, visible 400 - 600 lumens and 800:1 contrast ratio. With this small but high-performance projector, you can enjoy the high-quality images and videos in a very comfortable position.

Features:

High performance

With 400 - 600 lumens and 800:1 contrast ratio, this mini portable led projector will provide you the clear, razor-sharp images and as comfortable visual experience as the cinema.

Full high-definition

With the native resolution 320 x 240 pixels for clear and bright images, this mini portable led projector provides exceptional display quality which is perfectly designed for home theater.

User-friendly

Support AV / CVBS / High Definition Multimedia Interface / USB multimedia interfaces for DVD player, laptop computer, set-top boxes, gaming consoles, etc.. You don’t need to worry about any installment or compatibility problem since it’s very easy to use and compatible with most of the devices.

Durable and trustworthy

LED lamp life is over 30000 hours by many tests which can be said that it never needs to replace. The wifi led projector will be your lifetime trusty companion giving you the happy and satisfied enjoyment of watching photos and videos. Infrared remote control lets you enjoy your wonderful life which the wireless brings to you.

Kindly notice: According to our testing, the projection distance of the led projector hd 1080p preferably within 1.5 meters. If this distance is exceeded, the projector may not be able to focus, thank you.

BlitzWolf BW-MP1 Portable WIFI Led Projector Review

There are many brands and models of home theater projectors in the market now since the concept of home cinema is becoming increasingly popular, and sometimes it’s hard for customers to choose a right mini projector. For most of the people, they hope the projector can be easy to install and operate, besides, they also hope it to be small in size and wireless so it will not need much space. All in all, we compared so many projectors from different brands and this BlitzWolf BW-MP1 projector got the highest score from cost and quality.

Description:

Immerse the MP1 in darkness and bring your movies to life on the big screen. With our unique BW link technology, you can wirelessly connect your computer, iPhone and Android smartphone to the wifi wireless projector. Once paired, anything you play on your device will be shown on the projector screen. Get the popcorn, dim the lights and get the show started!

Features:

1. Enhanced LED Technology, 20% Brighter than ordinary LED.

This wireless led projector adopts the lasted upgraded LED technology and provides more brightness per watt than ordinary LED projector systems. The long-lasting lamp can operate for more than 20000 Hours.

2. WiFi Connectivity.

Connect your iPhone/iPad/Android device/Mac/PC with the wifi projector via Miracast/Air-Play without any cable. 

3. Large Screen Experience.

With a native resolution of 800*480, you can create a screen with an image size of 34-130 Inches(Recommend Distance 8.0 ft), and this wireless projector can project an aspect ratio of 4:3 and 16:9.

4. Keystone Function +-15 degrees.

Adjust the image manually with keystone to create a perfectly square distortion free screen.

5. Multiple Input Interfaces.

You can watch your favorite programs with bigger screen via VGA/HDMI/USB/SD card;connect an external speaker via the 3.5 mm headphone jack, or via the AV port, connect PC / Laptop via VGA or HDMI, connect chrome cast / fire stick via HDMI & USB 5V ports, connect DVD / cable box via AV cable, connect PlayStation PS3 PS4 or X-Box ONE Wii via HDMI cable to enjoy games on such  big screen wireless video projector.

6. Amazingly high definition

The high quality LED will offer you 1200 lumens brightness, 16 million colors and 800：1 contrast, so you will enjoy incredible real immerse.

How smart can a table lamp be?

When talking about table lamp, desk lamp, it might be just a lamp that stands on your desk? And the only use of this lamp is to light? Well, in most cases, this is the answer, but if you own a smart desk lamp, the situation will be totally different.

Why do we need eye care LED lighting?

When reading or working, standard lighting can be dim or flickering at a high frequency. Working in substandard lighting conditions can cause asthenopia and myopia.

How smart can a table lamp be?

Protect your eyes

Lack enough light or under bad light situation or too fierce light will cause damage to your eyes which will hurt your eyesight. However, this dimmable table lamp provides gentle, soft, comfortable and natural light output, the lighting is sharp and clear, so even if you need to read under this dimmable table lamp for a long time, your eyes will feel comfortable. 90+CRI true color vision LED output makes everything so clear under the light. And this bright color will make no double shadow at all, so perfectly suitable for writing and painting and so on. This 48 LED smart desk lamp is also an ECO-friendly design.

Foldable and changeable angles

The durable 140-degree foldable support neck has been tested over 10000 times and still can be adjusted which means the quality is super firm. The LED head is rotatable to 360 degrees and the stand base is also detachable for 180 degrees, so all these multi rotatable angles will fit your lifestyle and satisfy all your needs. You basically don’t need to move the dimmable desk lamp around to find the best light source and it can cover most of your desk area.

Fast charging

The reason why it’s smart is also that it comes with a fast 2.1A USB charger. So this usb charging lamp will save you some room and make your life more convenient. It also has 4 modes to choose and you can also set a time to turn it off.

Adjustable light control levels

There are 5 dimming levels for you to choose. Level 1：suitable for night time, when you wake up at night and it will not strain your eyes. Level 2-3: soft and relaxing, great for partying, entertaining or watching TV, movies, and other display screens. Level 3-4: for your reading and studying, it’s flicker-free and bright in the right level. Level 4-5: the usb desk lamp provides high definition light for your work and helps you focus on your project.

I, Xiaomi Robot (part 2)

Let’s keep figuring out xiaomi robot vacuum’s powerful and intelligent features together!

6. I love clean home

In addition to being a "smart" xiaomi robot, I am also a good helper for cleanliness. Strong high static pressure blower can effectively vacuum, at the same time with the side brush sweeping and other three-dimensional cleaning systems can easily absorb the floating dust, hair, debris, but also to deeply clean the floor and the floor gap. Even if you are barefoot walking on the ground, you can’t feel the slightest dust and grainy.

7. Surging suction, I have a strong lung capacity

With Japan's original NIDEC brushless motor, I can reach the maximum airflow of 0.67m3 / min, the maximum pressure is about 1800Pa, strong winds bring strong wind pressure can be quickly and effectively absorb the dust attached to the ground or carpet immediately.

8. Not miss any inch of the corner

In the cleaning process, the most troublesome problem is the wall of the gap. With my wall-side sensor, during the cleaning process, the xiaomi mi robot vacuum cleaner and the wall has always been accurate to maintain a distance of about 10mm, along with the high-speed rotation of the edge brush, I can thoroughly clean the wall gap dust.

9. Best shape design

I use a modular design structure, composed of seven parts, the xiaomi vacuum body is pure white, simple elegance. IMR process cover lets me has translucent texture, the whole body using high-strength impact ABS material, wear-resistant aging is not easy. The surrounding and the bottom of the matte treatment process to avoid leaving traces of collision wear. The xiaomi robot vacuum charger uses fire grade V0 plastic materials, effectively reducing the security risks.

10. Remote intelligent control

Open MiJia APP, you can view the cleaning status in real time, through the real-time map to check the xiaomi mi vacuum cleaning progress. In addition, you can arrange my cleaning tasks at any time, set the regular cleaning time every day before work, after returning home you can enjoy the happiness brought by the clean ground. When cleaning, there are quiet, standard, powerful three sweeping modes for you to choose.

I, Xiaomi Robot (part 1)

We have all heard that xiaomi has the most powerful and intelligent xiaomi mi robot vacuum cleaner in the industry, but how powerful is this xiaomi mi robot? Let’s go figure it out.

1. Automatically plan your home's sweeping path

I have a large number of sensors that synchronize the data information I get to my three "brains" processors in real time. They simulate how human brains think and work together to hand over the collected data to the SLAM algorithm, then build a map of the room and locate it in real time. Dividing the area into districts and planning the cleaning route according to the map will eventually form a clear path for cleaning and will carry out the task of cleaning the areas one by one.

2. Accurate detection of interior space

LDS high-precision laser ranging sensor will scan the room at 5 × 360 ° / sec for distance information. When laser light hits an obstacle, it forms a light spot in my eyes. At the same time, the image sensor of this xiaomi robot calculates the distance to the center of laser distance sensor based on the pixel number of the spot.

3. Three brains, independent thinking

Three independent processors mimic the way the human brain thinks and work together to capture and process sensor information simultaneously. By locating and calculating, the map is constructed in real time and the final cleaning path is planned, making the xiaomi mi robot sweep more efficient.

4. Comprehensive sensory, always aware of the complex environment

I cover with 12 types of mainstream sensors, no matter in any home environment, the 9.6cm height of the xiaomi vacuum fuselage can easily enter every corner of the home, both visible and invisible can be elegantly completely cleaned.

5. Do not worry, I will automatically recharge

When all the cleaning of the room is completed, I will automatically plan the shortest route to return to the charging stand. In the middle of the cleaning, if the xiaomi mi vacuum power is less than 20%, I will automatically return to the charging stand to charge. When the charge reaches 80%, I will return to the last place I did not finish cleaning to avoid the repetitive cleaning.

The Xiaomi MiJia IP Camera V.S. The Xiaomi XiaoFang Smart Camera: which is your most loyal guard? (part 2)

The Xiaomi MiJia IP Camera features

360 degrees panoramic view

Now you can get a better idea of what is happening on the screen, and all members of your big family will easily fit into a frame together on the video of any event.

High-quality, clear image with stable transmission +Professional chip

We have used the chip from American leader of image processing — Ambarella S2LM, which allows you to shoot video with a resolution of 1080p and also supports a 4x digital Magic Zoom. Now you can see every detail of the video in full color and stunning clarity.

Professional treatment of lens distortion with LDC technology

EVETAR lens with low distortion and professional LDC technology. The high precision algorithm can reduce the bending of frame edges, so you will always get a smooth, beautiful and clear picture that will please your eyes.

6 high-quality lenses

With its 6 lenses, the xiaomi ip camera has excellent optical performance. The aperture of f / 1.8 is able to pass enough light rays, so even at low light conditions, you can shoot a qualitative, sharp video.

Bilateral voice calls, Pleasant communication

The two-way microphone allows you to make video calls, helping you to be closer to your family. With the advanced technology such as DSP processing, we have managed to achieve excellent sound quality.

IR filter for 24-hour security

Your xiaomi camera can shoot well even in low light conditions. An infrared filter lowers the veil of darkness in night vision mode.You can see everything you need without even getting out of bed, nothing should be worried anymore.

Motion detection function

Using advanced image analysis algorithms, the xiaomi ip camera can accurately capture a moving object. You will also receive a notification on your smartphone when the camera detects movement.

Unique design, Acme of perfection

This miniature camera body has been qualitatively and carefully created by our engineers and designers. You will be delighted with a noncantilevered design of this camera.

It seems that both these xiaomi security camera are both quite powerful and has their own advantages, all you need is to choose the one suitable for you.