Totem Pole PFC Power Supply Design (ref)

A very detailed explanation on digital controlled totem pole PFC power supply. 

https://www.powerelectronicsnews.com/design-considerations-of-digital-controlled-totem-pole-pfc/

Will need some thing to read it all. 

RLC band-pass filter design calculator (online)

This is a nice RLC Calculator tool.

I came across it through a YouTube video of inductively powered led circuit design. 

http://sim.okawa-denshi.jp/en/RLCbpkeisan.htm

Electronic symbols

This is one good reference for electronic component symbols. 

https://electronicsclub.info/circuitsymbols.htm

Electronic Circuit Simulator

It's been a while I haven't looked around for electronic circuit simulation software. Just random search and found this website to be quite informative. 

https://www.circuitstoday.com/circuit-design-and-simulation-softwares

It listed a few open source circuit simulators. I'm not familiar with most of them, but heard of MultiSim and PSpice before. I'll have to read and go through the software to familiarise. 

Steve Jobs' life [Video]

Many people dislike Steve Jobs. Many still like him. The likes or dislikes are all for different reasons.
Leave those personal feelings alone, this video would be a good record mapped Steve's life.
You will need an hour of your time for this video. I spent my time on it and I think it's worth.
Motivation, Ideas, Examples, Emotions, Roads, etc, are contents I see in it.
I think everyone should just watch this at least video for once.


Reference:
http://youtu.be/WphgnZI5YQw
http://www.soyacincau.com/2011/12/26/the-billion-dollar-hippy-bbcs-documentary-of-steve-jobs/

Gearless Wind Turbine

We have seen wind turbine for quite a while. It's used to generate electricity by wind.
Wind turbine is installed facing opposing wind direction which is predicted to provide strongest or fastest wind speed. The stronger the wind, the faster the wind-turbine turns. The blades of the wind turbine are connected to a shaft which further connected to set of gears, which is then driving electric generator, which will be transferred to battery storage for further usage or maybe direct to some appliances.

Today, there's a new wind-turbine design developed by Windtronics, which is "gearless".
It's called the Honeywell Wind Turbine.

It works by obtaining electric energy from magnetic fields induced when wind turbine blades turn by the force of the wind. It has a system of magnets and stators that line its outer ring to capture power at the blade tips where speed is greatest. This design has minimal mechanical resistance and drag thereby allowing the turbine to start turning in winds as low as 0.5 mph and generate energy at 2 mph.
This is an interesting new wind-turbine development.
Here's the video showing it in action:


References:
http://www.earthtechling.com/2011/04/gearless-turbine-gets-power-from-light-winds/
http://www.prnewswire.com/news-releases/honeywell-wind-turbine-by-windtronics-now-available-for-purchase-120359644.html

Transparent/Glass Displays Technologies

This is the future of digital displays.
Communication and interaction everywhere.
I think Iron Man Movie has shown a lot of these.
This in turn telling us that Glass, Plastics and Thin-Film technologies are to grow.
Electronic circuits in glass is also an interesting technology. Flexible Integrated Chips? Yes!

HTC Flyer [Video]

This is another new Tablet to add into the market.




Reference:

Tablet PCs boom

After the launch of iPad, it seems many computer companies are coming up with their new more advanced tablets. I went around searching to see how many interesting tablets are there out at the market now, including those under plan. here are some videos of tablets that might catch your eyes. Thanks to those who posted these videos onto Youtube.

Motorola Xoom




Dell Streak 7


Samsung Galaxy Tab


Toshiba Folio 100


and this concept future laptop...this catches my attention very much.
Toshiba Libretto W100 7-inch Dualscreen Netbook

Recall of Garmin nüvi GPS Devices [updates]

I have been thinking if there's any reported case for this issue, and I just come across this article. It said there have been 9 report cases of battery overheating, but there's no injury reported. That means battery-on-fire has not been seen. It's good Garmin reacts quickly to this before worst case appears.
Following are some updated details i captured from http://www.oyetimes.com/news/canada/5951-recall-of-garmin-nuevi-gps-devices

Product Name: Garmin nüvi GPS Devices

Full Product Description: 
This recall involves the battery in certain Garmin nüvi models of GPS devices, which were manufactured by a third party supplier. Affected batteries are found in nüvi devices with model number 200W, 250W, 260W, 7xx and 7xxT (where xx is a two-digit number). The model number, as well as the serial number, can be found on a label on the back or bottom of the nüvi.

Only some of the affected model numbers have the recalled battery.

Hazard Identified: The battery can overheat, posing a fire hazard.
There have been 9 reports of the battery overheating in the United States.
Neither Garmin nor Health Canada has received any reports of incidents or injuries relating to the use of these products in Canada.

Corrective Action: 
Consumers should immediately examine their Garmin nüvi GPS device for the model and serial number (on back or bottom label). If the device has one of the affected model
numbers, consumers should stop using the device and visit the nüvi battery recall website or contact Garmin for further instructions.

Number Sold: Over 19 000 units of the recalled Garmin nüvi have been sold at various retailers across Canada, including Best Buy and Wal-Mart stores.

Time Period Sold: The recalled products were sold from October 2007 to August 2010.

Manufactured in Taiwan.

Manufacturer: Garmin International, Inc. of Olathe, Kansas

References: 
http://www.oyetimes.com/news/canada/5951-recall-of-garmin-nuevi-gps-devices 

Facebook mobile for Nokia 6630 [software]

I searched for Facebook App for my Nokia 6630...and I found this...Maybe you are looking for one too...
http://www.getjar.com/mobile/15801/facebook-mobile-for-nokia-6630/

nüvi Battery PCB Recall [Notice]

To everyone who owns/carries Garmin GPS,
Please take note of this battery recall by Garmin for models:

• nüvi 200W, 250W, & 260W
• nüvi 7xx (where xx is a two-digit number) 

Garmin is voluntarily recalling certain nüvi devices that contain a specific battery that was manufactured by the battery supplier within a limited date code range. Garmin has identified potential overheating issues when certain batteries manufactured by the third-party battery supplier within a limited date code range are used in certain Garmin nüvi models with a specific printed circuit board (PCB) design. It appears that the interaction of these factors can, in rare circumstances, increase the possibility of overheating, which may lead to a fire hazard. Although there have been no injuries or significant property damage caused by this issue, Garmin is taking this action out of an abundance of caution.

You can determine your nüvi model number by looking at the label on the back or bottom of your nüvi.

The recall can be read at https://my.garmin.com/rma/recallLanding.faces
Please click here to view the Garmin nüvi® Product Safety Recall Letter.

Regards,
I am one of Garmin GPS owners too. So, I am replacing the battery.

Safety comes first.

How to check IMEI number of Nokia Mobile Phones

Dial *#06#

Reference:
http://www.mobuniverse.com/2007/02/23/how-to-check-your-firmware-version-of-nokia-mobile/

How to check Nokia 6630 firmware version?

Dial *#0000#

Reference:
http://www.mobuniverse.com/2007/02/23/how-to-check-your-firmware-version-of-nokia-mobile/

HTC Wildfire [Video]

The younger sibling of HTC Desire...
Another interesting phone...


Reference:
http://www.youtube.com/watch?v=I8tRVqZS3Tk

Milestone of HTC [Video]

This is a good presentation showing the Milestone of HTC ...

Reference:
http://www.youtube.com/watch?v=yai2u3nVlN4

DIY Power-Window [Video]

Are you looking for a low-cost power-window for your car? Here you go...a great DIY idea for you... :-) If you can take it :-p

Honda CR-Z [Video]

I think, this is another nice hybrid car from Honda. Nevertheless, it's more a two-seater one.
Not bad. Quite an attractive Honda Hybrid.

Nokia N8 Sneak Peek - Hand Freestyle [Video]

This is cool...
This is an exclusive preview of the Nokia N8 showcased by hand freestyler Max Vlassenko.

Nobody - Transformers style "Wonderbots"

This is one of the very good robotic programming I have ever seen.
I wonder how long does it take to program these robots to dance so synchronized to the song.
I want Nobody Nobody but...you... :) Dancing Robots.
Good job to the creators. Great ones.




By the Seoul National University of Technology RnD.