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.

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.

Why wireless security systems are popular

Security cameras are installed in both private and public places. Property owners install Wireless Security Camera to keep tabs on what is transpiring while they are busy or away. Wireless IP Cameras are not only flexible but also affordable. Owners can determine how high or low they would like the wireless camera system fitted in your business or residential premises. Individuals prefer Wireless Security Camera because they do not fill rooms with all sorts of cables. If you have been considering installing a security smart home system in your business or home then you can go for the Wireless Security Camera. Here are some of the reasons why you need to install Wireless Security Camera.

First and foremost, Wireless IP Camera can be connected to your tablet or cell phone to the surveillance system. You do not need to hire an expert to help you in monitoring the home. The  Smart Camera can be used remotely from the comfort of your home. The unit can be used to detect anyone lurking around your property. Homeowners can use the device to watch live video feeds. The Smart Camera enables parents to monitor their children once they arrive at home. In addition, you the device can be applied to determine how your employees are treating your family members.

Secondly, installation of Smart Security Camera creates room for automation. You do not need to patrol your home all night and day to guard your property against intruders or thieves. Installing a Smart Camera will protect your home from any form of peril. If you are freezing in your bedroom then you can use the automated system to turn on a thermostat. The Smart Camera also allows you to adjust your environmental controls to create comfort.

Thirdly, installing magnetic car mount holder makes driving safe. For an overall personal safety, except for the home security, driving safety is also quite essential. Once you have installed the magnetic car holder, you do not need to hold your smartphone in your hand while driving. Instead, you only need to place the device in the holder as you drive. The units are compactly designed to make it easy to install them in your home or commercial property. In addition, users can relocate them with ease whenever they feel like doing so, thanks to the simple design, which means this car vent mount, in fact, can be used in many places. You can also try the wireless car charger holder which can hold and charge your phone at the same time.

Fourthly, the Smart Camera allows for distant transmission. A high-quality Wireless Security Camera will transmit strong signals to motion sensors in different parts of your property. The sensors can enable detect any form of motion taking place within your room so that you can take a necessary action to counter the same. You can take advantage of different brands of Smart Security Camera on the market to boost the safety of your home.

The evolution of the 3D printer

The past decade has witnessed quite a milestone in the rise of quality of print, especially since the advent of 3D printing. Not only that, but the several intriguing activities one can do using a 3-dimensional printer are enough to coerce every home or office to possess one. The facial features of an ancient king have reportedly been brought back to life from his skull's skeletal template using three-dimensional printing. 3D printing simply uses computer-aided design to shape up an object.

Where can one use a 3D Printer?

On that account, the 3d printer has creatively carved its space in homes and schools as the fun way to solve minor issues. A simple 3d printer kit can enhance the classroom experience for both learner and teacher as they develop model designs to depict actual structures and situations. While a tad of ideas on what to print out at home using a diy 3D printer exists on the vast, ever-faithful internet, technological advances have improved the first 3D printer's form to a portable micro 3d printer. As is characteristic of all improvements on innovations, its portability makes it the ultimate one to own as a beginner.

Striking traits of a worthy 3D Printer

Kickstarting the personal use of 3D technology may seem like a mammoth project but the facts demystify this notion. Take for example the popular Anet A8 3D Printer diy 3d printer. It's an ideal choice for newbies. Weighing roughly 9kgs, it is fascinating that the user can assemble it and start work 3 hours after receiving it. In fact, one can finish up their first 3D printed earbud holder as a trial task in an hour, as long as the design's file exists. The 3d printer kit that packages the Anet A8 3D Printer is completely do-it-yourself. It runs on Repetier-Host software - which is compatible with Windows, Linux, and Mac - prints 100mm per second with an accuracy of 0.1-0.4mm and has an SD-card reader. Alternatively, data can be input via usb printer cable. A standard 3d laser printer should have such qualities. Moreover, the user would have to ensure adequate power supply for a 12 volts' plug and provide an environment that will allow the aluminum heating plate temperature to achieve its maximum 110 degrees celsius comfortably.

Striking improvements: Wireless printer is already here

Adding WiFi to 3D technology has brought forth the wireless printer too. It's an exemplary innovation that avoids one getting tethered to their 3d laser printer like a pet. Using appropriate software, objects can even be produced in 3D in your absence by just sending commands to the printer from a different room or even through the internet. Notably, one can add WiFi capabilities to their printing gadget via a USB WiFi booster.

Time to get your hands on a 3D printer kit

It's undeniably fair that the 3d printing gospel is an apt way to save humanity from the boredom that solving everyday tasks can sometimes become. 3D printing makes one's simple private space a cherished 'manufacturing firm'. Another novelty gadget about 3d printer that is a hit trend now is the 3d printer pen which is very incredibly magical and amusing.

The Smart Home Concept: Get More Comfort and Convenience

Smart home innovation is becoming an emerging trend that empowers individuals to control their home wireless, remotely and intelligently. Smart homes are splendid ideas for the individuals who need to carry on with their life in solace and extravagance. In a smart home, you benefit from a top class comfort.

The xiaomi smart remote control 

There are a lot of smart gadgets accessible for your home. Each smart home gadget can be controlled, observed, and overseen using one application. This makes it exceptionally advantageous to attempt and control many devices at the same time. However, to achieve all this, you will need an automation hub such as xiaomi smart remote control. This gadget is integrated with smart home innovation allowing you to control each device using the hub remotely.

The xiaomi remote control will enable you to exchange your customary home into a smart home. The Home Hub has been intended to supplant conventional remote controllers and empower you to control all associated home apparatuses with the downloadable application remotely. Presently you can control machines whenever and anyplace, including AC, TV, set-top boxes, amplifier, speakers, projector, fan, camera, and so forth.

It is App Controlled where you can access the Mi xiaomi remote control anyplace using the App "Mi Smart Home" from smartphones. It has a 360-degree omnidirectional control meaning you can control all apparatuses in one room with 20m operation distance. It has dark light transmissive material which decreases the diffuse reflection and enhances infrared infiltration.

The smart xiaomi robot

Keeping up a clean home is not an easy task. However, xiaomi mi robot vacuum is here to soothe your tedious errand. The xiaomi mi robot vacuum cleaner is a profoundly insightful cleaning gadget and a standout amongst other created robot vacuums accessible in the market. The tremendous navigational aptitudes and AI fueled rationales makes it difficult to beat.

The xiaomi robot vacuum uses 12 different sensors to outline a productive cleaning design and avoid dropping of stairs and recall the zones it has cleaned. The primary sensor is the Laser Distance (or LDS) sensor that sweeps the area 360 degrees to frame a virtual guide in its memory of your home's inside design.

The xiaomi mi vacuum has a 5,200 mAH lithium ion battery that will keep going for 2.5 hours on a single charge. It is controlled by Nidec DC Motor that produces 1,800Pa of suction power. The xiaomi mi robot doesn't accompany a remote, yet you can utilize the MI Home App that you can use to schedule, clean and keep tabs on its development remotely since it utilizes WiFi signal.

Conclusion

What was once viewed as the home without bounds is here today. Smart homes have moved toward becoming a reality and not only for the flighty and well off. Through the use of creative innovation, property holders can transform their homes into cutting-edge machines that can be controlled and checked from anyplace in the world.

Getting Started the Arduino (part 3)

We talked a lot about the basics of Arduino, and for most beginners, the first step in getting started is to choose the right arduino learning kit. So, in the following, we will discuss in detail about what an arduino starter kit will contain and their usefulness.

Of course, except for the main Arduino compatible development board, the Basic Starter Learning Kit will basically include:

1. Prototype extension board: with the Double Sided PCB Board Prototype Panel Universal Circuit Glass

2. Breadboard: The original intention of the birth of breadboard, is to provide a temporary build circuit board, try to adjust the circuit connection without welding work abutment.

3. Motor and motor driver board

4. LEDs

5. Different sensors：Vibration Sensor, Flame sensor, temperature sensor, light sensor and so on

6. Infrared receiver

7. Photoresistor

8. Passive buzzer (piezo buzzer) and Active buzzer (tone generator)

9. Remote Control: the Wireless Remote Control Switch is a learning code wireless remote control switch (receiver), the output way /working way can be changed as you like, it is easy to match the transmitter. It has 4 Relays which can make the equipment turn or reverse, on/off and so on come true. The volume is small and the performance is stable and reliable, high receive sensitivity.

10. Heating module: The higher the voltage, the greater the heating current and the effect is better.

11. Radio Receiver: the Radio Receiver Module adopt the advanced technology of DSP and FM modulation PLL to make the sound more realistic, more stable performance, long working hours without frequency offset.

12. Other things like the Key cap, Key switch, Adjustable potentiometer, Jumper cap, Screen, servos, Component box, DuPont line, Breadboard line, 8*8 dot matrix, eight-segment tube, IC 74HC595, Battery, resistor plug, pin header, USB cable and so on.

Except for the Basic Starter Learning Kit, there are other more Arduino Compatible Kits like the diy arduino kit, the DIY Digital Kit for Digital Oscilloscope, DIY LED Kit and so on. The diy electronics kit can be used in alarm clock, festival decoration, LED lights and so on.