I've just disassembled this LED floodlight that I bought a while ago. It's some stupid little cheapie from a dollar store, so I figured that there'd be shit inside. But I wanted that LED cob.. a power LED :3

Well, shit wasn't too far off from the truth. The component choice is reasonable, but the design of the bloody thing.. batshit insane. The LED floodlight is powered by 4 AAA batteries, connected in series. So 6VDC. That then goes into this little tactile pushbutton, into the LED cob and then a 4.7 ohm resistor.

Well that's a pretty easy circuit.. let's remove the batteries and the casement, and put it on the lab bench power supply. Probes connected to the circuit with only the resistor and the LED cob in between (I didn't want to deal with the switch). Power supply set to 6V, current limiting to 500mA, contact!! And it works, amazing! So I let it run for a while to see that nothing gets too hot.. hah. After a minute or so, smoke would come out.. LED cob was a bit warm to the touch but nothing too bad. But the resistor.. I could cook water on it if I wanted to! 100 fucking °C, and rising. What the F yo?!

So I figured that I didn't want to put the resistor in between there. Just the LED cob now, which apparently has a forward voltage somewhere between 3.2V and 3.3V depending on how I set the current (500mA and 600mA respectively). Needed a bigger heatsink though, so I jammed one of my aluminium heatsinks on there. And it worked great! Very bright too, as it takes between 1.6 and 2W of power. Just for a comparison, the lighting in my living room is 4x5W and the ones on top of my dining table are 2x3W (along with some TL bar that my landlord put there.. fluorescent I think). So yeah, 2W is quite a lot for an LED, especially when it's all concentrated into one tiny spot.

That said, back to the original design with the resistor. 2 questions I have for that moron that designed this crap. First, why use a resistor for a power LED?! They needlessly waste power, and aren't good choices for anything that consumes more than 100mA. You should use PWM for these purposes, or tune your voltage on the supply side. Second, why go with 6V when your forward voltage is 3.3 at most? Wouldn't it make more sense to use 3 batteries with 4.5V? Ah, but I know the answer to the second one. AAA cells aren't rated for high loads like this. So that's likely why the alkaline cells that I had in there before have started leaking. Thanks, certified piece of shit!

Honestly, consumer electronics are such a joke... At least there's some components that I can salvage from this crap. Mainly the LED cob, but also the resistor and the tactile pushbutton perhaps.

One last remark that I'd like to make. This floodlight was cheap garbage. But considering that you can't do it well at that price, you just shouldn't do it. You know why? Because consumers always go for the cheapest. Makes a lot of money to build at rock bottom prices and make shit, but it damages the whole industry, since now the good designs will go out of business. That's why consumer electronics is so full of crap nowadays. Some unethical profiteering gluttons saw money, and they replaced the whole assortment with nothing but garbage. I'm sure that there's a special place in hell for that kind of people.

Fidget spinners are stupid.

But what do you have on your desk instead?

The challenge of a Rubik's Cube? A classic Newtons Cradle? A stack of empty pizza boxes? Magnets, because how do they work? The one and only devRant stress ball?

I'm looking for something to mess with when I'm staring in disbelief at horrible PRs.

Preferably something semi-creative, tactile and stress-relieving. The three-dimensional material equivalent of the doodle.

Something which is less annoying for coworkers than the clicky switches in my keyboard. And a bit more appropriate than my genitals.

Not at the hate point yet, but Apple's hardware division has been missing the mark for about 5-6 years now.

The phones have been too big for my hands since the 5 came out, and the latest lineup doesn't even have a compromise in that size.

The keyboards that replaced the chiclet keyboards suck because they provide almost no tactile feedback whatsoever.

Ditching the magsafe adaptors to force you to dedicate one of your USB ports to powering your machine is stupid.

Still doing fine on the software front overall, however. Granted, they've been dismantling everything I ever liked about iTunes since version 8 came out, but I've given up on that at this point.

Long long time ago when recharge coupons we a thing, I used to try out more codes in the series and waste my time. After failing a lot over this, I started trying out different USSD codes to see what other stuff is out there. This got me to stumble upon facebook and twitter on USSD. I'm not sure now but, twitter was probably *515# from my carrier.

Facebook. I remember chatting for quite a long period using this. Very slow and limited yet, fun. The USSD message expires within ~60secs. so you have to type the chat message before that or you lose everything you typed. The phone was no smartphone that would allow me to copy the text from the USSD input. On top of that panic, was a character limit to these messages. I remember hitting send while being midway through a message just so I don't lose what I typed, on a T-9 keyboard. Still miss those!

The person on the other side would receive a half message due to this, and would start replying without any patience, to which I panicked as now there's a new thing to respond to, and a half message which I'm waiting to complete.

Later over the weekend when I was allowed to visit the cyber cafe for an hour or two with 15-30 INR, reading the chat threads, being able to use the five sticker packs:) and thus continuing on a computer was fun. But, as the time at the cafe expires, I had to immediately shut off my session or I'd be charged more. Thus, I was left in the middle of a conversation again, and had to continue over USSD.

Using social media without any internet like this was quite fun in a weird way. If I get a new message, I'd get a USSD alert, and then an sms if I didn't reply in some 10-15mins!

This had all the features like like and comment. Friend requests too. For the posts in a "timeline" which was new and fancy in those days, all you see is the caption of a post which also gets truncated quite a bit as USSD also has to show it's options like:
1. Like
2. Comment
3. Next Post
4. Main Menu

This was around '13 or '14 I guess. After which I later got my first computer- a laptop. Anyways, the tactile feel of pressing the buttons on a T-9 keypad is nostalgic to me. 😅 And if you were a pro at texting, u must hv used shrtcts lyk dis too w/ emojis lyk :-) <3

Finally got my "new" keyboard! Had to use one of these at work for few months and I loved it. It has that classic tactile, clicky feel. I almost got an expensive mechanical one, but I'm glad I didn't.

Experience with Plasma Mobile, part 2.

I was able to clone the official master repository and commit my hacks to it, but when I sent the pull request, the current active maintainer said that the master branch was actually severely out of date and to try the "halium-flash" branch.

So I did. I checked out the "halium-flash" branch and attempted to install Plasma Mobile. The bash file used to flash the phone still needed to be hacked around, though my previous commit was made irrelevant by the change. However, I did get it working on my phone.

So, here are my thoughts: It's most definitely not ready. The lock screen looks pretty and is well put together, and the "desktop" and icons for applications look very nice.

However, my phone does not have a physical "home" button, and Plasma Mobile to date does not have a digital "home" button. So, in order to close an application I have to literally reboot my phone.

As of yet there seems to not be any tactile feedback or visual feedback, which is odd when typing in the passcode to log into Plasma Mobile or trying to open an application.

Firefox crashes if you try to open it, and currently there are two choices of wallpaper. I haven't tried calling someone, but I'm fairly certain that Plasma Mobile does not support telephony on my phone type.

So, my verdict is still the same: I have great hopes for the Plasma Mobile project, but unless you are a developer who is interested in making it a better product, I would stay away for now.