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.
@nickguy68207 жыл бұрын
Any time you hear "Eh one moment please", that means something disproportionately terrible has just happened.
@koolkombi71204 жыл бұрын
🤣
@beanapprentice1687 Жыл бұрын
Lol
@Polite_Cat7 жыл бұрын
every time the giant calculator comes out without warning i always chuckle because of how absurd and inconvenient it is
@gorillaau7 жыл бұрын
kekejojo1212 It tops the liet for oversized props.
@D3faulted17 жыл бұрын
It's rare to see something shitty enough it makes Clive not believe it could be that shitty and it turns out to be.
@tomlomax99097 жыл бұрын
8:59 The PCB silkscreen does correctly indicate this product is "BOLLOX"
@8bits597 жыл бұрын
Tom that it does.
@BillyNoMates19747 жыл бұрын
Build Original Lower Logisticly Organic eXtra quality ?
@mrclown74697 жыл бұрын
This is why zooming should always be used. Cry babies with 70" screens be damned.
@ScowlingWolf7 жыл бұрын
lol
@Tombalfe7 жыл бұрын
Well caught. I must admit to saving a screenshot and zooming in to see it. Gave me a chuckle.
@DiodeGoneWild7 жыл бұрын
Aren't those LEDs with built in resistors? Such LEDs do exist.
@Dremekeks2 жыл бұрын
I think they might have done it to make it so the LED turns on/off when they are charging?
@CheapCheerful2 жыл бұрын
OMG my two favorite electronics geniuses!! _Puts on Goonies sloth voice_ ..... *Heyyy you guyyyys!!*
@hernancoronel3 жыл бұрын
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!
@PaulJosephdeWerk7 жыл бұрын
And imagine someone putting in a fully charged battery upside down.
@kris334512 жыл бұрын
boom hahaha
@ryguy20062 жыл бұрын
Haha diode go brrrrrr
@Tony667927 жыл бұрын
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.
@realname35384 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.
@paranoiia87 жыл бұрын
One resistor to rule them all!
@gavincurtis7 жыл бұрын
And with fire it shall bind them....
@EddieTheGrouch7 жыл бұрын
All your resistors are belong to us!
@andysim2327 жыл бұрын
Akinaro my precious!
@Anvilshock7 жыл бұрын
So, Gandalf was really an insulator rather than a resistor, no?
@loz119687 жыл бұрын
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
7 жыл бұрын
I can't see the screen on the calculator. You should get a bigger one.
@TheSnaiku7 жыл бұрын
Or U should get larger glasses
@tin20017 жыл бұрын
John Howard You're not allowed to ask for zoom. People get upset about their 60" 4K pixels being misused.
@Tomanista7 жыл бұрын
what calculator?
@astridsactionrc5457 жыл бұрын
One resistor to rule them all and in the darkness burn your house down!
@aspicboat7 жыл бұрын
whenever you take that big ass calculator out I always think I'm watching a parody video
@tin20017 жыл бұрын
aspicboat I always think his hands are tiny.... and he's playing with really tiny electronics.
@darronjknight7 жыл бұрын
tin2001 Donald Trump, electrician 😉
@kewakl88917 жыл бұрын
It came from Konami. Calc Calc Revolution 計算する革命を計算する
@Lizlodude Жыл бұрын
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. 😅
@OAleathaO7 жыл бұрын
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.
@deadserenity957 жыл бұрын
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
@doorguner017 жыл бұрын
Calvin Cosmos You noticed that real quick eh?
@gavincurtis7 жыл бұрын
Did you try the tweezers in the outlet yet?
@leedaniel20027 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
@deadserenity957 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
@mashedpotatoes53235 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
@Tocsin-Bang7 жыл бұрын
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!
@dimwittflathead6392 жыл бұрын
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
@learnelectronics7 жыл бұрын
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 😁
@fieroboom3 жыл бұрын
...the X-ray machine... (AKA hammer) 😂🤣
@madrian_hello7 жыл бұрын
For this price I expected an empty box.
@SurrenderPink7 жыл бұрын
Did you steal Hagrid's calculator? Love your channel BigClive! So helpful and entertaining. Take it to bits!
@SproutyPottedPlant7 жыл бұрын
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.
@QuiteFriendlySwede7 жыл бұрын
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!
@QuiteFriendlySwede4 жыл бұрын
@Dr. M. H. Quite
@gblargg2 жыл бұрын
Wire your own charging circuit in and you get their spring-loaded holders cheap.
@martin090919897 жыл бұрын
"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
@SigEpBlue7 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.
@SianaGearz7 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.
@katbryce2 жыл бұрын
@@SianaGearz Through-hole components can be populated with a pick&place machine.
@SianaGearz2 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.
@samiraperi4677 жыл бұрын
"Oh no that's the warranty void."
@matthewmiller60687 жыл бұрын
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...
@ZacabebOTG7 жыл бұрын
Most of the BOM went into the sticky label.
@quaxk7 жыл бұрын
to be fair the old 80's era NiCd chargers weren't that more complex than this
@gavincurtis7 жыл бұрын
True, but at least they used separate current limiting resistors. :)
@HELLHAMMERHANDHIX7 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 !!!
@deadfreightwest59567 жыл бұрын
LOL, the label was the best-engineered part!
@DanielTralamazza7 жыл бұрын
When the gargantuan calculator entered the frame (for a split sec) I thought "hm such tiny hands" =D
@madhusudangupta366111 ай бұрын
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.
@DiodeGoneWild7 жыл бұрын
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...
@lucasrocha43292 жыл бұрын
You here.
@Equiluxe17 жыл бұрын
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!
@gavincurtis7 жыл бұрын
So this with a set of lipo batteries and the shitty pink USB charger is a perfect under $5 gift for the ex?
@dgedi787 жыл бұрын
Add a 4 pack of Trustfire 14500 and you're good to go.
@renzevenir48537 жыл бұрын
Ultrafire does the job even better
@userPrehistoricman7 жыл бұрын
Anything with fire in the name
@gavincurtis7 жыл бұрын
Yeah, fire... that's the brand I am thinking.
@Quick_Fix7 жыл бұрын
Did you know the work "Brand" in English means "Fire" in Dutch? :)
@BillyNoMates19747 жыл бұрын
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.
@kyoudaiken7 жыл бұрын
Somehow YT cuts off comments or my "View More" button is missing...
@BillyNoMates19747 жыл бұрын
possibly your web browser. are you able to try a different web browser ?
@kyoudaiken7 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.
@rocketman221projects7 жыл бұрын
Don't even bother modding it. Just get a smart charger so you don't kill your batteries.
@artifactingreality7 жыл бұрын
I liked the circuit it looked quite elegant.
@Darieee7 жыл бұрын
These videos are the best thing on youtube .. fullstop.
@caveman123ization7 жыл бұрын
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?
@flugschulerfluglehrer7 жыл бұрын
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...).
@harrickvharrick39577 жыл бұрын
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?
@Wil-q2p2 ай бұрын
You also want to make sure that there is a ripple with this circuit.Dathat's, it's not full d.C.It's not filtered DC, it's pulsating.D c that goes in but you still only get Maybe 1.2 V to 2 V for a nightcat's cell battery charger.Or a nightcat sell one point two lolls one point three volt battery
@burkezillar7 жыл бұрын
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!
@AttilaAsztalos7 жыл бұрын
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
@aaaa-me9uu7 жыл бұрын
I really love the large calculator.
@stacksofslaps74426 жыл бұрын
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
@Arrviasto7 жыл бұрын
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.
@AsunaRui2 жыл бұрын
this was recommended on yt and im not mad
@c-valueenigma49775 жыл бұрын
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
@DavidStrchld2 жыл бұрын
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.
@asagk2 жыл бұрын
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.
@mickkennedy13447 жыл бұрын
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?"
@jayherde07 жыл бұрын
Nope ... He eat fake sushi :-P
@TarnaBarTM2 жыл бұрын
For 1.5 Money, it's amazing it even works, heck, most of the money was probably spent on shipping and packaging.
@hyzenthlay71512 жыл бұрын
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.
@Darieee7 жыл бұрын
Am I the only one curious to see what would actually happen when you stick a 0v battery in ._. ?
@mikedjames7 жыл бұрын
Are they constant current LEDs with an integrated IC driver? Perhaps try measuring one outside the charger.
@richard180961 Жыл бұрын
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.
@benjaminmelikant34607 жыл бұрын
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!
@khaoliang2 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!
@nathanallan17 жыл бұрын
5:47 it's the debbil's resistance! Love the giant calculator!
@steve644647 жыл бұрын
Are 18650 chargers that cheap? with 4 holders? not that you could trust them but the holders may be useful.
@PeterMilanovski Жыл бұрын
I love how KZbin will throw me a 5 year old video LoL, basically telling me that I watched every current video available and they are desperately trying to keep me entertained LoL.... The design of this battery charger looks like you can put in a flat battery along with other cells that are charged and it should theoretically charge the flat battery until all cells are balanced! Possibly lighting the led on the flat battery to indicate that it's being charged LoL.... I wonder if it would actually work? I have an led with a PIR sensor battery powered by 3 AA cells in a dark hallway which I have been using for years. I use Panasonic rechargeable AA cells and always find that when it stops working, it's always one cell that is completely flat while the other two still have charge but they aren't equal either... It seems that even AA cells need some sort of balancing... I don't remember exactly but I'm sure that the cell which gets discharged the most probably goes way to low in voltage which is probably bad for it... Maybe it's time to invest in something else that is designed a bit better...
@ianroughley19337 жыл бұрын
That was a Lord of the Rings moment - One resistor to rule them all :D
@pu5epx5 жыл бұрын
Funny, there are dirt-cheap microcontrollers and ASICs for everything these days, they probably cost less then a discrete resistor, and charging batteries is not exactly rocket science.
@joefarr33047 жыл бұрын
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 ?
@GordonHudson7 жыл бұрын
I thought the calculator was just close to the camera, then I saw the giant hands.
@rizkyp7 жыл бұрын
that twang sound is somewhat satisfying.
@tarunmcginnigle48017 жыл бұрын
You should see how reliable the circuit boards on these DIY powerbank kits are on Ebay.
@renzevenir48537 жыл бұрын
Not reliable. Trust me
@pauls57452 жыл бұрын
i think the led is dual-purposed to take up excess current as batteries near peak
@SteveMorton7 жыл бұрын
You might want to take a look at the Ikea vinninge 2 battery USB charger
@wickieworld7 жыл бұрын
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?
@bigclivedotcom7 жыл бұрын
+Jeff Lewis LEDs are not designed to block reverse voltage. They can only handle about 5v.
@wickieworld7 жыл бұрын
bigclivedotcom Taphat answers a lot! In this case, there was only 5V in, but that is too close for my taste.
@crimsonhalo137 жыл бұрын
No CC or CV microcontrollers? No timer shutoff? Even if it doesn't set your house on fire, this design is thick as a brick.
@iri107 жыл бұрын
If I had money to burn on frivolities, I'd gift Clive a Ducky Pocket. It's a calculator with mechanical keyboard keys (it also doubles as a keyboard numpad). The drawback would be that it needs to be powered by USB to work with all its bells and whistles, like the adjustable color key backlighting. And of course the whole $70 cost thing.
@Tortus4127 жыл бұрын
if you placed 2 batteries in with 1 upside down. could that possibly light the LED's because of the absence of a diode?
@GyanenderSirohi4 жыл бұрын
They used this circuit because when the cell is fully charged the current will not pass through the led and it will not light up Indicating that the battery is fully charged.
@fatgoit7 жыл бұрын
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.
@Kris_M7 жыл бұрын
There are LED's with built in resistor, so maybe it is a little bit better then how it looks.
@Spiderelectron7 жыл бұрын
Clive, recently my local post office has been holding back anything that comes from china and carging me import duty PLUS a habdling charge that adds about £30 to anything coming from China. Have you seen this at all?
@bigclivedotcom7 жыл бұрын
+SpiderElectron Where are you based in the world?
@bigclivedotcom7 жыл бұрын
+bigclivedotcom Just noticed you said pounds, so UK? Is it big items? They shouldn't charge duty of its value is less than about £20. If they are then I'd suggest keeping all payment evidence and seeking advice from trading standards.
@anononomous7 жыл бұрын
£18 is the cut off for ordering from outside the EU. Anything below that shouldn't have any additional charges. Above that you stand to pay import VAT (20%), an £8 handling fee and potentially customs duty (which varies according to the nature of the item and is only charged only if it is over £120 in value and the value of the duty to be paid is over £7). I reckon £30 would be payable on a order of about £110 value. If that is about what it was worth then I'm afraid it is what you'll have to pay to get your stuff. It makes a lot of higher value stuff uneconomical even if it seems like a good deal.
@pirateman19667 жыл бұрын
In Canada, the post office will just sit on the packages for a month or 2 before delivering them. I am sure they do that on purpose, but not sure what that purpose is!!
@red90rover987 жыл бұрын
It is a backlog in customs. Nothing to do with Canada Post. There is so much illegally branded stuff coming in, they can't keep up.
@TechBaffle7 жыл бұрын
Shame Poundland don't still sell their USB battery chargers. Never opened one up but I couldn't imagine them being very complicated inside.
@bigclivedotcom7 жыл бұрын
I'm pretty sure I did one and it actually had a current regulation circuit inside.
@twocvbloke7 жыл бұрын
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
@misterhat58237 жыл бұрын
I figured there must be a common resistor since two cells didn't double the current, but no series resistor with the LED? I'd be adding one or tossing this thing.
@Subzer0393 жыл бұрын
Autocaptions turned "oh yeah theres not a lot in this" into "oh yeah let's get all up in this" lol
@ArtMorte7 жыл бұрын
Oh no, not the warranty!
@dazaro32 жыл бұрын
Another great video, I would never use a charger from ebay, any buy from manufacturer or big stores, I don't really want me house burnt down.
@Lumibear.7 жыл бұрын
Wiggle that LED Clive, go on, wiggle it, just a little bit...
@tuxrandom7 жыл бұрын
The legendary cheap pink usb charger from china would fit this perfectly.
@dougerrohmer7 жыл бұрын
Do the LED's not maybe have a built in resistor? I remember about 20 years ago you could get them.
@MoezShakeri7 жыл бұрын
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 !
@bitelaserkhalif7 жыл бұрын
You can build it for lithium ions, By using 4 tp4056. Now where to put them?
@donnierussellii46597 жыл бұрын
It seems like they had a pile of components in a bin and the boss said make something from this junk and so they did.
@mysock351C7 жыл бұрын
I would have liked to see the issue with the LEDs demonstrated by shorting the terminals so they pop.
@Sypaka Жыл бұрын
I don't think the charger should OUTPUT anything... Which would be the case, IF there was a diode across the cells. No wonder why thats so cheap. Oh well... I think this can be used as a DIY powerbank, if you resolder the plug or split it. Do that at your own risk, though.
@brzydka_i_bestia7 жыл бұрын
Clive had high expectations but chinese are getting better and better on saving components. Even I was not expecting such shit circuitry. I have an old NiMh USB charger which had transistors in it, served me good before contacts broke off.
@stephencresswell47607 жыл бұрын
What would the effect of this charger be on batteries if used regularly? Also, could you please get a bigger calculator? I couldn't quite see the digits on that one! (I have a cute little retro 1970s one you can have with vacuum fluorescent digits).
bigclivedotcom Ok! Will do. Have a few. Can't resist retro digital stuff. If ever you need an old digital watch or calculator for a video just let me know! Keep up the good work. 👍
@Jeff52637 жыл бұрын
I have a battery question. Can a lithium-ion battery charger work on lithium-polymer batteries? I search eBay for a LiPo charger and many are described like "Polymer Lithium Battery Charger Protection Board Li-ion Charging Protect" or just say "lithium" with nothing more. Some just say lithium-ion. What's your advice, O wise one?
@bigclivedotcom7 жыл бұрын
The terms lithium ion and polymer are just fired about randomly. Technically speaking they're both lithium ion batteries and will usually have the same upper voltage of 4.2V. The LiFePO4 cells are different though and need a lower upper charge voltage.
@Jeff52637 жыл бұрын
Thanks! You're a big help.
@der.Schtefan2 жыл бұрын
That calculator made me laugh for 5 solid minutes.
@qbasic162 жыл бұрын
Oh nooo... they didn't... 😢 nvm the missing reverse current protection, or overvoltage or any protection at all...
@ryanstanley29854 жыл бұрын
Really like to see ZMI PB401 inside.
@wazzock9992 жыл бұрын
it's not very often that Big Clive is left speechless :)
@saber1epee04 жыл бұрын
I'm puzzled by your "Ideal" drawing... Sure maybe the current would slow down, but why would that not charge the battery all the way to 5V eventually (which would destroy the cell)...
@saber1epee04 жыл бұрын
Or maybe with the Diode at 0.6V, it would charge to 4.4, but that's still quite a big deal...
@bigclivedotcom4 жыл бұрын
NiMh cells can be trickle charged continually, even when fully charged.