Pepperspray gadget/weapon/hazard

I have seen people buying pepperspray for their own self protection. How effective is it? A pepperspray is really a great gadget for one to protect themselve from any harm by anyone. But not many know the proper way to use it. Some don't even use it instead they put it in the most confine place in their hand bag or cloth.

Without a proper way to use it, it can be a weapon or hazard to themselve. I have read in the newspaper that someone fell into their own trap because they did not know how to use the pepperspray. It become a very helpful tools to the perpetrator.

Before you are ready to use it there are some tips or instruction that you need to follow.

They are:

1. Spray in the direction of the wind. You don't want the pepper liquid to end up in your eyes/nose do you !!!

2. Keep at a place where is reachable but not at a place where you put all your make up or stationary.

3. Don't panic. This is the usual advice you will hear but it is rational because some pepperspray comes with a stopper/pin that you need to pull or twist before you can use it.

4. Learn some basic moves so that you can have an easy target on your opponent.

5. Have a short blink or turn your head slightly before you spray. But make sure you targeted your opponent. This is to avoid the pepper liquid to reach your eye or nose.

6. Have a real case scenario practice without spraying it. This is to prepare yourself for the worst.

Computer addiction

Computer addiction? Fact or trend? It seems like usual phenomenon happening around the world. The fact is we cannot live comfortably without computer. Since everything is computerised these days there is hardly anything is done by manually literally. Bill payments and shopping are done through computer at home. Everything is easy with computer.

We play and entertain ourselve on the computer. It is said that live is boring without computer. For computer addicts they simply can't see their computer being off. A touch on the keyboard gives them satisfaction. It seems as the mother of all entertainment gadgets.

Despite the disadvantages of computer addiction is not unknown but many just deny it.

Anti-shake on the camera

I have notice some of the cameras available in the market claim they have anti-shake technology. The question is how much we need it. For usual people it seems a great technology to have in the camera. But for an intermediate or sports lover is it helpful?

I was told that the technology is to reduce blurry image due to shaky hand. And it is not design to reduce blurry image due to moving object. The image of moving ball, bird and so on cannot be captured clearly even with when the anti-shake is on.

Which means we still have to rely on lame old method such as shutter, aperture, exposure control and the tripod. Remote shutter release also encouraged. I guess with the remote I won't be needing the anti-shake after all.

DIY Security system experiment

You have seen in the movie that some security system uses laser as the trigger/sensor. You actually can built a simple version of that by using the cheapest material you can get in the market.

Apparatus or material you need
1. Light sensitive light/chime/music box
2. Laser pointer
3. Mirrors

First thing that you need to so is to install the light sensitive light or some call it "cat eyes". Then to protect it from the high intensity laser you can paste a thin film on the sensor. The more opaque the film the brighter place it can be installed to. But not too opaque because it will not function well. Set the light sensitive light/etc to switch on when the laser is pointed at the sensor and off then the laser is not pointed at it.

Secondly is to install the laser pointer. Anywhere you install you need to direct the ray of the laser to the sensor or the light sensitive light/etc. Then you are done.

Try to block the ray of the laser. If the light sensitive light/etc turns on, that means it works. If it is not, it is because the film you use to cover the sensor is too thin which cause daylight to light it.

You must be wondering what is the mirror for. It is for you to reflect the light as desired to form a web of laser ray. You need to ensure that the reflected laser light/ray ends at the sensor.