B-Focus

Entries categorized as ‘Uncategorized’

Mod on X-Twin charger

November 13, 2006 · Leave a Comment

Last week bought two x-twin bi-wing rc plane. It’s quite fun:)

There is one annoying thing, the plane is charged by the transmitter. So the batteries drain very quickly:(

I decided to mod it to accept external power supply as charger source.  The designed voltage of power supply is 9v. but it’s difficult for me to find a dc 9v power plug. finally, i find a ac 9v power plug (from an old modem) and decided to add a rectifier filter inside the transmitter. After everything is installed into the transmitter, i realized the output voltage of rectifier is 14v!!! even with the load of charger. Fortunetely, I worked out a solution to handle with this problem. it’s very easy indeed. just hook 3-4 diodes (I used GP15D, but any diodes with >1A current limit should be fine) in series to the power supply supply.

Here is my version (photo will be uploaded later). i even used the swith on the socket to automatically swith the power supply to external one when I plug into the plug.

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Cool projector

October 2, 2006 · Leave a Comment

The greatest repair project ever.

The PROXIMA DP5610 projector is salvaged from a huge rubbish bin. The first look of this machine is REALLY TERRIBLE. The shell cracked, the lens craked too. After I take it apart, the mirror system inside also fell down.

But finally, it is fixed and works great. What I need now is a suitable screen, since the wall in my room is in light color. That causes everything projected looks vintage.

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Summer projects ideas

October 2, 2006 · Leave a Comment

Summer is coming. I got some ideas to make something.

Idea A: Air-Conditioning Fan

Basically, ensemble a normal fan and something salvaged from a fridge. I need it in the hottest days, I guess.

Idea B: Ice-cube Maker

Since I bought a ice cracker for $5, there is always some ice drink included in our meals. A problem rised: the ice cube preparation is too slow. I’m thinking maybe it’s possible to convert a fridge to a automatic ice-cube maker. This machine should be able to get water in automatically.

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Long weekend

October 2, 2006 · Leave a Comment

It’s a unexpected long weekend for me. Although after submit the second paper, I really need a rest. A camping was scheduled but unable to execute because the long weekend: too many people go camping, I failed to book a site.

Then, except a half day picnic at Centenial Park, most of my time is spent on sleeping, watching dvds, and repairing my poor car.

It’s surprising that I got my two years old battery replaced in the final month of the warranty, gained a new three year warranty and got $12 money back. It’s the advantage that you paid more money in a high reputated store.

The almost crapped front panel is also fixed, by using some salvaged parts.

Replacing the wiper blades only cost me $3. I should do it earlier to avoid the scrach on my wind screen.

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CHOICE

September 14, 2006 · Leave a Comment

CHOICE

A good consumer site in Australia.

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The most popular BSPs & BSs

June 4, 2006 · 1 Comment

Blog service providers:

Blogger.com, what I’m using now.
TypePad, you have to pay for that.
LiveJournal.com, also from the Six Apart.
WordPress.com
Yahoo 360 blog
MSN spaces

Blog systems:
MovableType
WordPress

I’m thinking if I should move to one of them.

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The Wayback Machine

June 4, 2006 · 1 Comment

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A good web crawler

June 4, 2006 · Leave a Comment

Heritrix – Home Page

Yes, it’s open source.

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Internet Archive: Wayback Machine

June 4, 2006 · Leave a Comment

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Coke+Mentos

June 4, 2006 · Leave a Comment

http://eepybird.com/dcm1.html

This is the coolest one I ever saw before.

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