Monday, July 25, 2016

LED light bulb that fit in PLC downlight fixture

I have been wondering for a long time if the PLC downlights in my house that use CFL (compact fluorescence) bulbs can be replaced with LED light bulb without much modification. Today, I've finally found the answer.

One of my PLC downlights is faulty and I need to replace its 18W CFL bulb. While searching for its replacement at the shop, I found this...

Yes, it is the PLC light bulb with 2-pin leg that fit with the fixture of my downlight. Instead of CFL tubes, this product is using LED as its lighting source.

So, this is exactly the LED solution that I've been searching for years. Even better, this kind of LED light bulb fit exactly to the existing PLC fixture, and totally no modification is needed.

This LED light bulb is more environmental friendly than the CFL, as it contains no mercury. It also claims to have longer lifespan than CFL, and consume less electricity to obtain the same amount of lumen output. In addition, LED light generates much less heat than CFL. It is also said that LED light does not attract insects, which is a desirable feature. However, this LED bulb is a little bit more expensive than its CFL counterparts.

I have purchased one to replace the faulty CFL bulb. See it in action below:

Finally, I've found the solution to change my PLC based downlights at my house to LED type.

I have been gradually changing the CFL bulbs with E27 base to LED type, as LED light with E27 base has been around for a few years.

Eventually, most if not all the lamps at my house will be LED based, when the CFLs are gradually replaced after they have reached their end of life.

Sunday, July 24, 2016

Changed my car battery with The Battery Shop

I've just changed my car battery today with the service from The Battery Shop.

My old battery was still able to crank up the car engine, after serving for about 2 years. I decided to make an appointment with The Battery Shop for a free onsite checking, after experienced 2 times of car clock reset itself to 12:00 and 1 time of all the radio station preset memory gone. Yesterday, the VST-706 voltmeter in my car has shown unstable voltage that kept on changing within the range of 13.0V to 14.8V when the car is running.

2 young men arrived at my home right on time of the appointment. They called me about 40 minutes earlier to conform the appointment before they came.

They checked my car electrical system and informed me the car alternator is working fine. They found greenish residue developed at the anode terminal of the old battery. Decision was then made to replace the old battery with a new Korean brand Atlas BX 75D23L sealed maintenance free (SMF) battery.

They kept my car engine running during the changing of battery. The whole process was less than 5 minutes. All the settings and memory of the car's clock and radio system are still remained after the battery swap.

Here is my car's new battery, up and running at its place. The voltage supplied is now stable at around 14.2V when engine is running with this new battery.

The Battery Shop's onsite service (delivery, inspection and installation) at Klang Valley area is free of charge. The 2 young technicians I met were polite and the job was professionally done. I was given a RM20 discount, and the new battery cost me RM310. This price is quite reasonable, as 75D23L battery is of higher spec than 55D23L and therefore carries a higher price tag.

The new battery comes with 12 months warranty with warranty card and a car sticker. The technicians informed me that if they see this sticker on my car's windscreen during their next service, they will provide RM20 discount for the next battery change.

I am aware that The Battery Shop is in direct competition with BateriKu. The brands that they carry are different, and the team is also different. If you prefer Atlas BX or GP, you can contact The Battery Shop; if you prefer Century, Yuasa or Astra, you can contact BateriKu.

Friday, July 22, 2016

Wireless-AD - the next generation WiFi (WiGig) with Gigabit per second speed

Perhaps many of you have just upgraded your WiFi network from Wireless-N to Wireless-AC just like me, the next generation of wireless network namely IEEE 802.11ad has already come to the market.

Instead of operating at the highly congested 2.4 GHz band or the less congested 5 GHz band, wireless-AD (a.k.a. WiGig) operates at a new 60 GHz band. The key selling point of this wireless-AD network technology is that it is able to provide an unprecedented  throughput as high as 7 Gbps, which is even much more faster than the wired Gigabit Ethernet network!

However, the wireless-AD network, operating at 60 GHz band, has even shorter range than the 5 GHz band WiFi, and it find itself more difficult to penetrate through walls and other physical obstacles. In addition, its performance is degraded by the amount of oxygen in the air!

With these limitation, wireless-AD might require an open space environment with less oxygen in the air (such as at high altitude places) to transmit data at high speed to nearby devices that support the technology.

Some possible uses of wireless-AD could be media server transferring super UHD movie to nearby TV, "wireless external SSD hard disk", "wireless thumb drive without USB need", etc.

TP-Link has already come out with the Talon AD7200 Multi-Band WiFi Router that supports wireless-AD technology. However, many wireless devices are yet to catch up with this new technology.

Anyhow, it is already supported in the Qualcomm Snapdragon 820 processor which is inside the Samsung Galaxy S7, Samsung Galaxy S7 Edge, LG G5, Moto Z, Sony Xperia X Performance, XiaoMi Mi 5, and the newly launched HTC 10.

It is expected to be also supported in the upcoming Samsung Galaxy Note 7. However, it is still unclear whether Apple iPhone 7 will support wireless-AD or not.

Hint: Click on the "Older Posts" link to continue reading, or click here for a listing of all my past 3 months articles.