The easiest and the cheapest way to purify the room air


The smoke from California fires caused air purifiers to be sold out at many locations. Today I am going to show you how to use what you have or can probably still get, to the room air clean. Compared with the expensive air purifiers on the market, these DIY air purifiers are equivalent but at a much cheaper price.
Three reasons they are cheaper:
1. if you already own a fan, then you don’t have to buy another fan.
2. when buying filters, you can buy whatever size is most suitable for your fan, or is cheaper
3. unlike air purifiers, the filters as well as fans can be bought cheaply (because both items are high volume commodities).

For example both the fans and the filters can be bought for about $15 each.

Build an easy & free home security system in under 5 minutes


The first part of this video is about how to quickly build a free basic home security system in under 5 minutes. I have listed many options for you, but you don’t have to choose all of them, work with what you have and is the best for you. It is easy — if you are a cell phone user, you should be able to do it. It is usable as it is, and will be sufficient for most users.

However, it is also possible to add features which will improve it. To help advanced users, I introduce a couple more phone apps to get you started. Through the explanation of how these apps work I explain the basics of internet and the home gateway router. I show the communications between different devices among different networks. Understanding this diagram will help you to debug all parts of your security system.

Since it is easy and does not cost anything, why not give it a try? In my neighborhood, burglaries have been increasing. Some people blame this on California’s Prop 47. California’s Proposition 47 downgraded a variety of “non-serious, nonviolent crimes” that had previously been considered felonies to misdemeanors. A thief may now steal something under $950 on a daily basis and it will never rise to felony status. Without your own security cameras, it’s difficult to catch thieves unless they leave fingerprints. One by one my neighbors started buying security cameras and services. Even if you have already bought some cameras, this can complement them by adding even more cameras. I have covered every single one of my windows, and hope that in addition to providing camera footage of any motion around the house, this will also act as a deterrent to possible thieves.

So get your security cameras ready because the latest is that California will end cash bail next year. When the new law takes effect, thieves without money will no longer need to worry about cash bail because by definition theft is not a violent crime.

Since different viewers may have different requirements, here are the URLs you can click to move quickly to find the sections you are interested in:
* how to set up the basic app:
how to set up the basic app

* how to attach your phone to the windows:
how to attach your phone to the windows

* how to improve with a couple more apps:
how to improve with a couple more apps

* how to conceal the camera and spy:
how to conceal the camera and spy

* how to tie a knot with the waxy dental floss:
how to tie a knot with the waxy dental floss

* debug, the gateway router and internet:
debug, the gateway router and internet

How To Make A Free and Accurate Kitchen Scale


This kitchen scale took me only a few minutes to make. My invention uses a few commonly available materials and tools. It is free and pretty accurate. It is also durable and easy to use. To improve the accuracy, I have provided a few guidelines to help you to understand the usage and find the optimal accuracy for your own situation. Since all the parts used in making it can be used or shared with your other projects (the paint stick can be used as a ruler), it does not require any space to store it. I hope this video can inspire you to invent useful devices with things available to you. This kind of project will also nurture your kids’ creativity and future-proof their skills. If you have any tips, please leave a comment below.

I will also show you how to make another very small scale that is hidden inside your shopping bag. This way you can do comparative shopping discretely. If you don’t have the time or the ability to make the first one, the rubber band scale is easier to make. But it does need more time to re-calibrate especially if you stretch it too much.


How To Pour Engine Oil | NO FUNNEL,NO TOOLS


Did you know there are actually 3 different ways to pour oil into your engine? Two of them you may already know. Today I’m introducing a new and unique third way.

This is very useful for when you’re traveling and you find your oil level is low. You don’t have to buy a funnel or any other tools — just a bottle of oil!

Assuming that you don’t have a funnel, knife, or a screw driver, we will show you how to pour oil without spilling! Whether you have a 1-quart bottle or 5-quart jug, we have you covered. And you’ll impress your friends!

Since there are different kinds of oil bottles and different kinds of cars, we have done extensive research to cover all possible scenarios. Hopefully you will find the solution to suit your needs. If you don’t find a solution, or if you have any tips, please leave a comment below.

If you are at home, you can easily make a funnel with zero cost. Check out my other video: (4 Ways To Make An Engine Oil Funnel & 2 Ways To Pour Oil)


Taichi Push Hand: Student Phil Sun’s Farewell Demo

In a very short time, student Phil Sun has significantly improved his Taichi push hands skill. Due to job change, he is leaving the class. This video is a farewell demo, a demo of what he has learned. Master Byron teaches his student holding nothing back, this is also a reflection of Master Byron’s teaching accomplishment.

This is a very useful video for your push hands practice from Master Byron. Please like it and share it with others.

Note that other Tai Chi styles or other levels may have different interpretations of this same topic, we hope people can appreciate this version.

You may upload your own practice video to youtube and post on for others to view and comment.

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It is important we share our experience and discuss the best ways to learn Tai Chi. We don’t want to lose the traditional martial arts treasures, we want to improve them by developing better skills and enabling better learning.

High definition video may help you see all of this better. This video is shot in 4K UHD setting (if you have 4K TV, you may select this youtube Setting/Quality).

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push hands