every time the giant calculator comes out without warning i always chuckle because of how absurd and inconvenient it is

@gorillaau

7 жыл бұрын

kekejojo1212 It tops the liet for oversized props.

I bought 3 of these to rebuild as per Clive’s design to keep my niiMH AA fleet on charge indefinitely. The price itself was well worth the fancy enclosure. All I needed were resistors as the leds came free. The sum of the parts was worth more than the whole. Thanks Clive! Thanks China. I was going to build Clive’s version, repurposing these turned out cheaper and faster. LOL.

Any time you hear "Eh one moment please", that means something disproportionately terrible has just happened.

@koolkombi7120

4 жыл бұрын

🤣

@beanapprentice1687

11 ай бұрын

Lol

8:59 The PCB silkscreen does correctly indicate this product is "BOLLOX"

@8bits59

7 жыл бұрын

Tom that it does.

@BillyNoMates1974

7 жыл бұрын

Build Original Lower Logisticly Organic eXtra quality ?

@mrclown7469

7 жыл бұрын

This is why zooming should always be used. Cry babies with 70" screens be damned.

@ScowlingWolf

7 жыл бұрын

lol

@Tombalfe

7 жыл бұрын

Well caught. I must admit to saving a screenshot and zooming in to see it. Gave me a chuckle.

It's rare to see something shitty enough it makes Clive not believe it could be that shitty and it turns out to be.

At 8:45 “one resistor for them all, FRIGGING CHIPSKATES!”, says Clive that bought it for 1.79 delivered to the isle of man! LOL! Keep up the great content Clive!

whenever you take that big ass calculator out I always think I'm watching a parody video

@tin2001

7 жыл бұрын

aspicboat I always think his hands are tiny.... and he's playing with really tiny electronics.

@darronjknight

7 жыл бұрын

tin2001 Donald Trump, electrician 😉

@kewakl8891

7 жыл бұрын

It came from Konami. Calc Calc Revolution 計算する革命を計算する

I can't see the screen on the calculator. You should get a bigger one.

@TheSnaiku

7 жыл бұрын

Or U should get larger glasses

@tin2001

7 жыл бұрын

John Howard You're not allowed to ask for zoom. People get upset about their 60" 4K pixels being misused.

@Tomanista

7 жыл бұрын

what calculator?

Aren't those LEDs with built in resistors? Such LEDs do exist.

@Dremekeks

2 жыл бұрын

I think they might have done it to make it so the LED turns on/off when they are charging?

@CheapCheerful

2 жыл бұрын

OMG my two favorite electronics geniuses!! _Puts on Goonies sloth voice_ ..... *Heyyy you guyyyys!!*

And imagine someone putting in a fully charged battery upside down.

@kris33451

2 жыл бұрын

boom hahaha

@ryguy2006

2 жыл бұрын

Haha diode go brrrrrr

One resistor to rule them all!

@gavincurtis

7 жыл бұрын

And with fire it shall bind them....

@EddieTheGrouch

7 жыл бұрын

All your resistors are belong to us!

@andysim232

7 жыл бұрын

Akinaro my precious!

@Anvilshock

7 жыл бұрын

So, Gandalf was really an insulator rather than a resistor, no?

Coming back to this one from Clive's updated video on the same basic product, it's funny how much has changed. The bench is so clean, the spudger looks so lively and new, the kink palculator has yet to be created, and yet the pen and notebook are still exactly the same. And of course cheap ebay junk is still cheap ebay junk, just now it's less cheap. 😅

Considering that @ £1:59 it came all the way from China, with free postage and a string of people along the way presumably reckoning on getting some sort of profit out of it, then i'm amazed that it even manages to be as good as it is.

@realname3538

4 жыл бұрын

You can make products that only cost only 1.59 through low quality materials, mass production, and only having to pay your employees a few cents a day.

One resistor to rule them all and in the darkness burn your house down!

I think you should put a flat battery in it and see if you can melt the led then measure the size of the skid mark it leaves in the housing

For this price I expected an empty box.

Did you steal Hagrid's calculator? Love your channel BigClive! So helpful and entertaining. Take it to bits!

I really love watching your videos despite knowing nothing about engineering and electrics apart from the fact that Im never going to put a knife in a toaster every again

@doorguner01

7 жыл бұрын

Calvin Cosmos You noticed that real quick eh?

@gavincurtis

7 жыл бұрын

Did you try the tweezers in the outlet yet?

@leedaniel2002

7 жыл бұрын

Calvin Cosmos I did that for years as a little kid and never got hurt. It's a miracle I'm not dead

@deadserenity95

7 жыл бұрын

Ive also done it all my life if toast is stuck, then a couple of years ago it sparked and shut off all the electrics, I was perfectly okay if not shocked and scared, thought I broke all the houses electric but luckily it just flipped the safety switch. Never done it again, and now Im fascinated with just how dangerous electricity can be, it only takes a little careless mistake

@mashedpotatoes5323

5 жыл бұрын

Hey I actually once put a knife in the toaster but nothing happened, I only touched the knife on one of the coil things tho

Granted this is a crappy charger as BigClive™ demonstrates but at least it allows you to charge one battery at a time. Most of the AA/AAA "value" chargers I see here in the States will only charge in pairs.

"Oh no that's the warranty void."

Wire your own charging circuit in and you get their spring-loaded holders cheap.

to be fair the old 80's era NiCd chargers weren't that more complex than this

@gavincurtis

7 жыл бұрын

True, but at least they used separate current limiting resistors. :)

@HELLHAMMERHANDHIX

7 жыл бұрын

quaxk alright matey...I got years outta my 80s rechargeable battery set. used my Sony Walkman on the bus on the backseat smoking ciggies and stomping my feet from 1985 onwards with the mega bass full up and auto reverse kicking on every time !!!. I still have it to this day...but no need for the bus these days !!!

I once ordered a USB lithium 18650 charger from Ebay. It had no circuits in it whatsoever.... 5V straight over the cell with no current limiter. Now that's a fire starter!

@QuiteFriendlySwede

4 жыл бұрын

@Dr. M. H. Quite

Had a rechargeable 12V drill with a charger that had the same circuit (different values of course) as you drew first. 18V input from a transformer. The main resistor burned out 3rd time I used it, couldn't check the value, it was about 1W, and the surface was burned off!

"its not an good design" what do you expect for 1,50 delivered from china? It even surprised me that there was a pcb in it, they could even done this by twisting the legs of the component around some plastic studs. XD

@SigEpBlue

7 жыл бұрын

Good point! I suspect either we'll see that in a future iteration, or perhaps these PCBs are rejects from another product the "manufacturer" picked up from the local PCB maker's scrap pile for next to nothing.

@SianaGearz

7 жыл бұрын

I think the PCB was cheaper, because salaries in Shenzhen are rising. The PCB is a single-sided phenolic, and as Shenzhen has been moving towards higher-end and higher complexity products with epoxy based dual sided boards, this got incredibly cheap. Besides, it can still be automatically populated and soldered, with exception of through-hole components and the input leads, which are manually added. There's the whole lot of a few dozen EUR of setup costs and then you can get thousands of these things for basically free. It might as well be a custom ordered board - it doesn't matter. What is a lot more expensive is the enclosure.

@katbryce

2 жыл бұрын

@@SianaGearz Through-hole components can be populated with a pick&place machine.

@SianaGearz

2 жыл бұрын

@@katbryce They can - it depends, some can, some can't - but it's a flaky process that is usually avoided if at all possible and sensible.

Clive has the best named tools in biz...the vice of knowledge, explosion containment pie pan...I think you call the calculator: the giant calculator of glaucoma 😁

@fieroboom

3 жыл бұрын

...the X-ray machine... (AKA hammer) 😂🤣

There's a current limit built into the led. Test it out by shorting a battery in it and see what happens. Burned up means no limit, still working means limited

Most of the BOM went into the sticky label.

When the gargantuan calculator entered the frame (for a split sec) I thought "hm such tiny hands" =D

Hi Clive! You should definitely market the "Clive Spatula" - definitely branded! I have seen you use it to open anoying plastic cases and now to cleanly strip off a sticker. All of us need such a useful and verastile tool! Honestly, it is a simple tool but seemingly very effective. Oh and Scottland should not drop out of the Union (I mean the European one...).

I quite like it's case and form factor and the fact that it can charge from USB, if only it had a few more resistors and perhaps an IC or 2 to make it smart.

that LED trick not putting a resistor seems common anymore, I have had several dollar store USB chargers where they just put a blue LED across the 5V output directly. so far they have all mysteriously stopped working, never considered maybe the LED shorted or something...

LOL, the label was the best-engineered part!

So this with a set of lipo batteries and the shitty pink USB charger is a perfect under $5 gift for the ex?

@dgedi78

7 жыл бұрын

Add a 4 pack of Trustfire 14500 and you're good to go.

@renzevenir4853

7 жыл бұрын

Ultrafire does the job even better

@userPrehistoricman

7 жыл бұрын

Anything with fire in the name

@gavincurtis

7 жыл бұрын

Yeah, fire... that's the brand I am thinking.

@Quick_Fix

7 жыл бұрын

Did you know the work "Brand" in English means "Fire" in Dutch? :)

These videos are the best thing on youtube .. fullstop.

BigClive, can you short out where one of the cells would plug in ? Id be interested to see how bright the LED would get before buying out. On a separate note, buying one of these and modding it with your circuit diagram would make a useful basic charger.

@kyoudaiken

7 жыл бұрын

Somehow YT cuts off comments or my "View More" button is missing...

@BillyNoMates1974

7 жыл бұрын

possibly your web browser. are you able to try a different web browser ?

@kyoudaiken

7 жыл бұрын

Nevermind, now it works. I guess YT is just buggy as always. I have zoom on to have the videos a bit bigger, since I am on a 4K 32 inch screen.

@rocketman221projects

7 жыл бұрын

Don't even bother modding it. Just get a smart charger so you don't kill your batteries.

It's funny that someone new will stumble across this video, watch it, and wonder what happened to Clive's desk for it to be so black. IF ONLY THEY KNEW THE HORRORS OF WHAT HAPPENED THAT NIGHT!

In LED lighting with complete strings of them 'in a row', there is going to go a whole lot of current through every separate, individual LED in each string as well, namely the current that is needed to power the total of all the other LEDs in that series. I have always wondered how that was possible, I believe I saw lights with over 30 LEDs (on a chip) per row?

I liked the circuit it looked quite elegant.

Very well worded commentary of the anatomy of the street vendor charger. The vdo also gives the real working principle of such cheap chargers for which one should be aware of their consequences. Thanks.

Yessss! As soon as you started drawing the circuit I kept going "nope, there will be no LED-series resistor - it can work without that, so betcha they left it out". I was not wrong... :D

I enjoyed this video as much as I do most all of Clive's videos, however, I would like to say that I like it better when Clive does the video straight through with no pauses. I know that he does pause it to be prepared to give a thorough explanation, but it kind of takes away from the conversational, off the cuff feel of the videos. I dunno. Like I said, I like them either way, but I liked it better in the past when Clive would just do the video in one shot in exchange for a few seconds of minutes of confusion until he figured out what was going on. Just submitting my opinion. What do you guys think?

I have seen worse, I took one apart and the LED was in series with the battery so it had all the charging current passing through it, the led started out extremely bright and and got dimmer as the batteries charged, it took a long time to charge any battery. At the time I got it in the late 90's it was not particularly cheap ether, came from a market stall.

@jimmybrad156

Жыл бұрын

Do you remember how much current it passed? Or if the LED stopped current flow before it could be properly fully charged? Do you remember how many clouds were in the sky 3 million seconds ago? I hope so!

I thought the calculator was just close to the camera, then I saw the giant hands.

i love your channel, you are very informative.

I really love the large calculator.

The one thing i have noticed about horrible chargers, LED, USB, light sources, fans, etc is that they have that weird cone looking thing at the end or beginning of it

I ended up buying one of those amecal meters last year and its been pretty good. I havent tried mains or any thing evil with it though.

I cant believe you have not take a look inside of recharge usb-batteries. they got like usb ports onto batteries. id love seein you taking those apart

Is there a possibility that the resistor is somehow built into LED? I'm thinking about those black sleeves or something like 5V led+resistor combo potted in led resin. I'd expect to see inventions like this by now.

Clive, is it possible to make a proper usb aa/aaa NiMH charger by using your simple circuit? Can I ask what values to use please?

If a red LED drops 2V and a flat cell drops 1V, then 2V is at the 2.2ohm resistor. The current would be 909mA and most of it is passing through the poor LED. ... WTF ??? :D That's the worst charger I have ever seen. Are you sure the 20ohm resistors are in parallel with the LEDs, not in series? But OK, everything is possible in china...

@lucasrocha4329

2 жыл бұрын

You here.

it's not very often that Big Clive is left speechless :)

That calculator made me laugh for 5 solid minutes.

So do the led's pop of you short where a cell should be?

Are there any li-ion AA or AAA style bateries? I would be interested in knowing and watching some reviews.

Meanwhile in China: "Haa, Clive say it 'very shitty product' ". "I good at English, Clive mean it a excellent product -- yes, 'shitty' mean good." "Last week he say "this very dangerous" -- 'dangerous'?" "He mean our product very good for all family to use." "What he mean by "One moment, preeese"? "It mean he have to do poo -- he come back later." "I a' like the Big Crive -- I wonder he eat much porridge in the Isle of Mens?"

@jayherde0

7 жыл бұрын

Nope ... He eat fake sushi :-P

This might be a bit off your field but I am curious of what affect this design would have on the batteries? Perhaps the LED's would 'blow' after some time but that wouldn't really stop the charger from functioning. The problem I see if if a full battery especially NiCd is placed next to a near empty one (or shorted battery) a large current would flow and could cause the circuit to burn out. The other issue I see is a battery is doing extra discharging for the same reason, a depleted battery will pull from a nearby charged one,two or three, as well as a shorted battery would discharge all of them.

sir i saw a video on you tube saying that if we connect a p mosfet to vcc nd battery out +terminal of tp4056 we can get a chargering current upto 10amps....

that twang sound is somewhat satisfying.

That was a Lord of the Rings moment - One resistor to rule them all :D

I have 4x AA NiMH Rechargeable batteries that I have used before but I haven't used them in around a year or so, should I just charge them or should I full discharge then in my smart battery charger.

@bigclivedotcom

4 жыл бұрын

There's no harm cycling them or just topping then up.

Is it possible the LEDs has built in resistors? I have a bunch of red LEDs with built in resistance bought at a local store(they dont sell them anymore though)

@akronymus

7 жыл бұрын

No. LED with built-in R are special parts to replace indicator lights and therefore too expensive for such products. In fact, you can hardly kill a red LED hooked on regulated 5 V from an USB port, still over-loaded though. The 2 Ohm R about halfs the USB voltage in order not to kill the AA cells at first charge ... they won't survive several charging cycles, of course.

Are they constant current LEDs with an integrated IC driver? Perhaps try measuring one outside the charger.

this was recommended on yt and im not mad

Autocaptions turned "oh yeah theres not a lot in this" into "oh yeah let's get all up in this" lol

5:47 it's the debbil's resistance! Love the giant calculator!

I love the little dodgy LED, it's just like the power LED cheap Sony stereo downstairs, only lights up when poked... :P And that label, does it not know that resistance is futile? :P

Maybe you could test the current through the LED. Would it exceed the USB specifications?

How do you know when the battery’s are fully charged ? do they turn off once charged ?

@bigclivedotcom

2 жыл бұрын

No. Just continuous trickle charge.

Question time! When you checked for a diode on the +5v side of the circuit, you used the red lead on the meter on the USB +5v line, correct? Wouldn't a diode have allowed current to pass in that direction? Power should flow through +5v and out to the 0v side the way that you tested even with a diode, should it not? The black connection on the meter is the connection to ground, right? And the red side is the positive side? Just trying to clear up my confusion, enjoying the video so far!

@khaoliang

2 жыл бұрын

He checked it with diode test mode, there you measure forward bias first, this should have shown 0.7 on the display as that is the forward bias voltage drop of a diode. It however showed 0.4 and beeped, as that is too low for a healthy diode! Had he be measuring continuity, the display would have read 0 for 0 Ohms - it would not beep in that mode if the display wasn't 0!

Is it possible these LEDs have built-in/internal resistor?

You might want to take a look at the Ikea vinninge 2 battery USB charger

Are 18650 chargers that cheap? with 4 holders? not that you could trust them but the holders may be useful.

Clive, I have seen some of your doodles where there is a diode in line with a LED. The question begs, if you have a LED in a line, why is the diode needed? Perhaps due to a lower forward voltage?

@bigclivedotcom

7 жыл бұрын

+Jeff Lewis LEDs are not designed to block reverse voltage. They can only handle about 5v.

@wickieworld

7 жыл бұрын

bigclivedotcom Taphat answers a lot! In this case, there was only 5V in, but that is too close for my taste.

They are cheap, and they are shitty, but for me they have had a great purpose... I got a few of them as battery "frames", removing all the electronic components from inside and changing the USB cable to an XT30 connector to use it for charging AA and AAA batteries, both NiMH and Li-Ion, via my Imax B6AC hobby charger (a real one, not a chinese clone). I even cut 2 of them up in a way to make an extra long one for charging my NH-14WM gumstick batteries. I find that the spring loading mechanism is pretty useful and that, and the plastic itself, weren't at all bad on the ones I got. As they are, they are pretty bad, but, they can have a purpose.

Guess the reason it came so cheap, they produced a large number with faulty pcb layout ... someone made a mistake with the LED + Resistor not to be in series in the layout, and now they try to get rid of the production lot for pretty much the plain material price.

Hi mr Clive i just seen some AA batteries that have a usb charger built in the end of them have you seen them yet ???

@bigclivedotcom

7 жыл бұрын

I think Julian Illet took one apart.

Do the LED's not maybe have a built in resistor? I remember about 20 years ago you could get them.

I hafe the same when its loading the lamps are red but after hours its still red when i know when its full?

@bigclivedotcom

Жыл бұрын

These units have no end of charge detection.

I have this exact device. seems fine.

@jimmybrad156

Жыл бұрын

Just don't put them in the wrong way, and take them out when charged.

For 1.5 Money, it's amazing it even works, heck, most of the money was probably spent on shipping and packaging.

Really like to see ZMI PB401 inside.

Hi I have a question. In the schematic @10:00 (quickest one I could find) near the LEDs you drew a "=3" or "= sideways m" and I was just wondering what that is. I have only recently found your videos and was rather confused by this. Any answer would be appreciated. Thanks :)

@haarv

7 жыл бұрын

That is part of the LED symbol. It is two arrows used to symbolise light being emitted. Hope this helps!

@i-will-get-you-there

7 жыл бұрын

That is "LED"

@Nimbos0

7 жыл бұрын

Ahh. Thanks for telling me! :p

The legendary cheap pink usb charger from china would fit this perfectly.

Hi bought this charger as well. when I'm charging the battery there's red light showing. does it change the colour after full charge how does this light system works ?

@bigclivedotcom

3 жыл бұрын

With this type of doesn't indicate that the battery is charged. It trickle charges continuously.

@PreetSingh-vg4dh

3 жыл бұрын

@@bigclivedotcom so any idea how many hours does AAA battery takes to get full charged

@-K3C-

3 жыл бұрын

@@PreetSingh-vg4dh same here. I left mine for two days to charge batteries and then found the battery's leakage and the USB adapter has died. Have you found an answer?

@PreetSingh-vg4dh

3 жыл бұрын

@@-K3C- yes, thank god it didn't blast for you, only charge it for maximum 2 Hours

@-K3C-

3 жыл бұрын

@@PreetSingh-vg4dh thanx

Hey there BC, with all of the battery chargers you have taken to bits by now just which one would you recommend your viewers to purchase then? Thanks, Tom.

@bigclivedotcom

6 жыл бұрын

Each has its own merits, but I've not found the ultimate charger yet.

@AThreeDogNight

6 жыл бұрын

OK, thank you BC. Reason I ask is because I've been looking at one on E-bay which is a revised model & I just wanted your expertise on that matter because I have the normal chargers without any complaints other than Ni-mh. takes way too long to charge back for that little charge we get back in place for it. But anyway thanks again, Tom.

i think the led is dual-purposed to take up excess current as batteries near peak

You should see how reliable the circuit boards on these DIY powerbank kits are on Ebay.

@renzevenir4853

7 жыл бұрын

Not reliable. Trust me

Luv the Vids Bigman the explanations are in laymans terms and easily understood ..might be the accent ... ...Thanks anyway... ? i have the Chepo MultiMeter same as the one You used firstly ! do You know the model/Type No BAC, I have lost the manual and need to get to grips with this Meter as the last BigBuck Meter did`nt take "a hit of stupidity " ..Eddie.

Am I the only one curious to see what would actually happen when you stick a 0v battery in ._. ?

ok ! im a programmer.. and it's 5 am here , i don't know why i'm here.. but i just love to watch those numbers and calculations... wow !

Since this is supposed to be a USB powered charger, doesn't the single current limiting resistor limit the total current draw meaning that one battery would charge faster than four, but the total current draw would remain within (sort of) the USB port specs irrespective of how many batteries are being charged, and what their charge level is ?

Oh no, that's the warranty void. 😂🤣

Clive, you had me at "cheap and very shitty."

Oh no, not the warranty!

if you placed 2 batteries in with 1 upside down. could that possibly light the LED's because of the absence of a diode?

Interesting... I bought some 2400 mAh NiMh batteries to replace the old Ni-cd for my AOR Radio, which is quite power hungry. Unfortunately I could not get them to fit "side by side" without quite a lot of force, which reulted in damaging the outer insulation and shorting the batteries. Ooops. It apppears that these higher capacity NiMh are somewhat fatter in diameter than a standard battery, around 0.3mm which adds up when you have four side by side. So people beware, if you have a tight fit appliance. After buying various other good brands I found some " Fusion Max" cells which are NiMh 800mAh and do a reasonable job. So it seems the higher capacity are bigger.

can yoiu do a review and maybe a teardown on the FusionMax rechargeable batteries that are in this video please, i use these all the time for various things and they seem quite good for their cheap price, of £1-£1.50-£2.00 per pack of 2 i cant remermber their exact price at my local cheapo shop :)

Shame Poundland don't still sell their USB battery chargers. Never opened one up but I couldn't imagine them being very complicated inside.

@bigclivedotcom

7 жыл бұрын

I'm pretty sure I did one and it actually had a current regulation circuit inside.