A small review of JBL E65BTNC

In 2016, I came across a nice deal for an on-ear headphone – The Motorola Tracks Air. It was selling on Flipkart for ₹2500. That was steal deal, considering the original price is ₹8990. I used it for on and off for quite some time but the on-ear type meant it started hurting my ears when using them for more than 30 minutes. So gradually the usage waned off and I stopped using it. Usually I do not buy new stuff unless the previous one I have is completely dead, this is especially true in case of electronics. Because of the online shopping deals it’s very easy to accumulate unnecessary junk. Just like that due to impulsive purchases without much thought I have a few electronic junk lying around which is in pristine condition not used even a single time.

In order to get rid of the Tracks Air headphones which I had, I tried putting an ad for it on OLX India site which is a famous marketplace for pre-owned stuff. I have successfully sold quite a lot of things on the platform and even bought a few. But for some reason people didn’t seem to be interested in this headphone at any price, so I gave it to someone I knew and didn’t have any headphone for free. At least something lying in my junk is useful to someone.

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Maintain lead acid batteries regularly

Thursdays are usually maintenance day for the electrical power supply company in my area. So there was nearly a full day power cut. Luckily, I have a UPS so that sorts out the problem for 8-9 hours. The lead acid battery I use for my UPS is about 3-4 years old, and these being unsealed batteries they last long, really long if maintained properly.

In the past I have had one such battery last for a decade before requiring a replacement.

Unsealed lead acid batteries require two important maintenance activities:

  1. Topping up distilled water every 6 months
  2. Applying petroleum jelly / grease on the terminals to prevent corrosion
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When you get blocked on social media (Twitter) for defending Yoga

In the world of Twitter I came across an interesting thread, discussing morning affairs that every human being has to go through:

I thought it would be a good idea to pitch in with my limited yoga knowledge because yoga has helped me in that morning affair as well:

To that, this person @abhijitkadle says he wants to see scientific basis or else it is bullshit:

I have experienced a lot of health benefits due to practicing yoga over the years compared to when I was not. Alright, so I started replying to this thread with various links and articles which had the appropriate references to some studies and papers by prestigious institutes. Let me share the links I have shared with Mr. Prometheus lapetus on the thread one by one and the referring research papers each of the link(s) had.

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History repeats itself – RSS and Blogs making a comeback?

Unless you’ve been sitting under a rock for the past couple of weeks, you would be well aware of the Cambridge Analytica scandal that happened with Facebook. Around the same time, I came across an article on Twitter – the source for all the content I read, which says It’s Time for an RSS Revival. I wasn’t using Facebook much and this news has pushed me even farther from it. There are specific reasons I am still on Facebook but my activity has reduced significantly.

Ever since Google Reader was killed, I had been using this RSS reader called NewsBlur. But I was already significantly into using social media as a source of new content, so I never really used Newsblur seriously – in spite of me having a premium account all these years.

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A nonsensical ride with a rude UberPool rider

So I had went to drop my vehicle for servicing and took UberPool to return back home. UberPool is quite economical compared to traveling in auto rickshaws – they quote random prices which is not justifiable according to the distance.

There was this co-rider with me who had come with some luggage from another city and apparently the driver had suggested him pooling because his distance was long; and it seems the rider had never used UberPool earlier.

The logical thought about pooling would be – drop the rider at the specified drop location and continue with next passenger. And that’s what holds in Uber’s policy as well – I did not know about this either but came to know about it when the guy called Uber customer care and started complaining to them about not dropping at the specified location.

The problem with the specified map location by the rider was – there is construction going on at that place and due to road rerouting it is not possible to go there. So the rider called up his local contact and asked where to come, the person on phone said some location which was a some 100-200 meters away from the drop location and inside some lane. The driver refused for the same. The rider got angry about this.

The driver stopped at the junction but it was creating traffic jam so he went to the other side, and stopped under the flyover where the original map location was given.

Looks like that shot his anger off the roof and he called police and said driver is refusing to drop at his location and taking him elsewhere and also said since he was not from this city the driver was harassing him. The driver explained to police (over phone) about the reality and police also asked the rider to get down at the drop location or discuss this problem with Uber customer care.

This is when he called Uber customer care and once again, he was proved wrong (because Uber can track vehicle location) and vehicle was standing exactly at drop location. Customer care rep also asked him to get down and not get into any fight.

Since lot of time was getting wasted I asked the driver to take him to the nearby location which was originally discussed by this rider’s local person. So both of them started arguing with the driver that it is his mistake and he is harassing him because he is from other city. Eventually the argument settled down after driver apologizing for no mistake of his.

End of story.

People have brains in their knees or what? You can clearly see traffic getting piled up and there is construction going on in the front, and your drop location has been reached yet you are arguing about dropping at a different location?

Also do not treat cab drivers like they are your slaves. They are doing business.

NONSENSE. TIME WASTE.

Results of an online survey about preferred tyres

I am facing some instability on my car rides and after showing it to numerous mechanics, wheel alignment centers everyone said the same: The tyres have gone bad and they need replacement. The car hasn’t had that much running to justify a tyre replacement so I started looking online for solutions. Finally I have to conclude after much online research that the tyres have gone bad.

With so many tyre brands available in the market at different price points it’s difficult to make a good selection by just reading stuff online and knowing about experiences of friends / mechanics. In a commission driven business model like India where every tyre vendor sells tyres of every company they would obviously try to sell the tyre that will fetch them most profits (exceptions exist, I know!). So to make a good choice I decided to run a survey on Twitter and Reddit. Posting the results of the same. I received total 41 responses.

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A simple graph I made using spreadsheet to compare call rate in per second vs per minute. There was a similar graph somewhere around, but I lost the link and hence I made my own graph 😛

call_rate

1.5 paisa/second and 45p/minute are common rates in per second and per minute plans offered across India, so used that as base for creating my graph. If you are interested in downloading the spreadsheet I used for this calculation, you can do so here. It’s an OpenDocument Spreadsheet. I don’t use Windows nor MS Office. 🙂

Linode, you need a spam filter

I got this usual money scam email not directly, but via Linode Forum! Who even deploys Web applications without basic spam protection?!

Hello nileshgr,

The following is an email sent to you by joy kone via your account on
“Linode Forum”. If this message is spam, contains abusive or other comments
you find offensive please contact the webmaster of the board at the
following address:

https://forum.linode.com/memberlist.php?mode=contactadmin

Include this full email (particularly the headers). Please note that the
reply address to this email has been set to that of joy kone.

Message sent to you follows
~~~~~~~~~~~~~~~~~~~~~~~~~~~

From: Joy Kone

I have sent you this e-mail because of the need to open discussions with
you. I don’t want you to misunderstand this offer in any aspect…if it is
okay with you, I ask for your full cooperation. I have contacted you base
on trust to handle an investment in your country/company on my behalf as a
prospective partner.

My name is Joy Kone. a citizen but resides here . It might interest you to
know that I have US$10.500,000.00 deposited with a financial institution to
be invested in your country/company. It is pertinent to let me know if you
can handle this fund/investment with you in your country so as to furnish
you with all the necessary details about the financial institution for more
information. Meanwhile, i am very honest in my dealings with people and I
also demand the same from you as a Partner to be. Can I trust you with this
fund?

I want you to note that this is a mutual business venture as t here is a
reward for your assistance. I shall let you know your benefit for your
assistance as we proceed. For a more comprehensive details and source of
fund, please contact me as soon as possible. If you find this letter
offensive, please ignore it and accept my apologies.

Regards,
Joy Kone

Okay I received a reply from someone working at Linode, apparently it is possible to turn off the ability of others to send email to you via the forum:

The PC reset problem with Active PFC SMPS and UPS

I have a desktop machine with a Corsair SMPS which has active power factor correction. I had a Luminous 675 VA UPS before buying my new desktop machine with this SMPS. The cheapo power supplies available in India (which cost a fourth of the cost of branded ones like Corsair, etc) do not employ power factor correction.

When I was deciding on the configuration of my machine, I decided to buy the latest Intel i5 (i5-4670). The processor had been launched just around a month or two ago. I also bought Gigabyte motherboard and Corsair cabinet after recommendations from many geeky friends I know online who have built their own desktops. They also suggested me that since I was already spending a lot on the machine, I should definitely go for a branded SMPS in order to protect the components instead of going for a cheap one and risk the components.

I did not know that there were compatibility issues with UPSes and Active PFC power supplies. This came to light when my computer started restarting whenever there was a power changeover by the UPS because of high voltage in the input or a general power failure. Because this wasn’t happening for almost 1 year after I bought my computer, I thought something was wrong with my UPS. So I called up Luminous support and they sent an engineer for inspection. He found that the battery terminals had corroded. The Luminous UPS I have supports those big batteries (12V / 100 Ah is the battery I was using) and it claims to be sine wave UPS. He then cleaned them up and things seemed to be back to normal (they just seemed, also known as placebo effect :P). The problem returned back after a few days.

I even tried giving my SMPS for a warranty repair to be sure that the issue is with my UPS and not with the SMPS. Then I started researching about this. I found that this was a known problem (involving big brands like APC!) and the reason was certain PSUs expected pure sine wave at the input but the UPS available in market were outputting modified sine wave, and that’s apparently the oscillator circuit for which is far cheaper and easier to design compared to pure sine wave (Pure sine wave is what you get from the power supply company at homes). I still don’t know if the real cause of the PC getting reset during a changeover is because of the sine wave / square wave thing or it’s because the switch time of the UPS is higher. But if it was a delay, it should happen every time there is a changeover which wasn’t the case.

This clearly indicated that whenever the power waveform at the UPS had an unexpected form, the SMPS was cutting supply to my PC. During the research, I came to know about the kinds of UPS. There are basically two kinds of UPS, one is line interactive UPS and another is online UPS. The difference between the two is that a line interactive UPS will supply AC power directly from the power socket it is connected to as long as there is power and a relay like mechanism is used to switch to battery when there’s an input power failure whereas an online UPS supplies power from the battery all the time. Whenever there is input power available, it will charge the battery. There’s zero switch over time in case of online UPS, while for line-interactive UPS it’s 10-15 ms.

I asked my inverter vendor if he had online UPS and I got shocked when he told me the price for a 600 VA online UPS: ₹25000. That’s way too much for me. Line interactive UPS of the same size costs less than half of that price. So I started manually using the UPS in battery mode whenever I was working on my computer. But this problem needed a solution. So yesterday, I bought a second-hand UPS for ₹250 (yes, that cheap. New ones cost around ₹2000) which supported 600 VA load at output, but the charger inside it cannot charge big batteries. I decided to use my bigger line-interactive UPS as a charger for the battery while this thing will power my computer.

I just bought two wires for connecting the battery and this new UPS. I also added a fan to inside the new UPS’s enclosure to keep the transformer cool as I had the experience of cooking up the transformer during this experiment in another 15-year-old UPS I had. Now things are smooth. Apparently 12V battery chargers are available for ₹4000 on eBay. So why is an online UPS so expensive?! That remains a mystery to me.

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