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.