Inside a solar/mains rechargeable fan / work light. (with schematic)
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- Опубликовано: 20 сен 2024
- Every year I work on the Royal Edinburgh Military Tattoo, I get a dubious technical gift from the crew-chief Vince - who routinely travels around the world as part of his normal work.
This year the gift is a solar and mains (100V to 250V) rechargeable work light complete with integrated flashlight, area light and cooling fan.
It turns out that the circuitry was quite hard to reverse engineer because of its weirdness. But it turns out to be quite interesting and relatively efficient.
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.co...
This also keeps the channel independent of RUclips's advertising algorithms allowing it to be a bit more dangerous and naughty.
I not only love "taking things to bits" but I love your voice! You could be a book reader for a second job.
R-rr-rr-right! ©
Met those SLA batteries before, and they are very light. Opened a dead one ( it was brand new, and did not want to charge, got a whole load of LED's out, which was the goal, they were cheaper than buying new) and inside it was 2 rather poorly made spongy lead plates per cell, with a very dry separator, and filling up the rest of the volume was some polystyrene sheet, crudely broken to shape to fill the cavity, that was obviously meant to have another stack inserted. Added some sulphuric acid to the one that had come apart easily, a few spots of glue used to hold it together, and it was then able to take charge. I estimated around a half amp hour capacity though, though the case was implying that these were 4Ah packs. Went with the other alarm batteries to the scrap yard.
@Ad Lockhorst I wonder if that has a linguistic relation to "cole slaw", which is 'murkan for shredded cabbage salad with a bunch of mayonnaise and something acid like vinegar.
The reverse engineering bits are great for learning...
Really was quite interesting, nice to see some retro 80's "real" circuitry for a change, as opposed to the modern ubiquitous one chip does all approach. Well done Vince! (and you Clive :)
I want to see that jukebox in the background of his live stream
Maybe a little video about how technology changed with PCBs or
Maybe something on how simple lights were before LED and rechargeable
Well living in a desert we are two guys to truly enjoy a fine personal fan powered by the very desert bright abilities we confront daily, nice to see you share it.
Lance & Patrick.
neat device, thanks to vince for finding and getting it.
when he turned the fan on a breeze coming from my window hit my face... that scared me xD
I think Clive being a god explains that.
Pretty sure Big Clive's an agnostic (or maybe atheist) god, which adds a nice twist :-)
@Ad Lockhorst Blue Fanta?! I now need to find this for myself. Fascinating. The world is indeed still a wonderous and mysterious place!
I would also like to pass on my thanks to Vince, the crew chief, cheers!
This device reminds me of device I have: a nice little USB power bank with a bright LED array on one side, USB in and out, and solar panel on the other side. As long as I charge the device via USB it is great. If I put it in room light, the charge status LED bar graph comes on, but it appears the bar graph uses more energy than the panel generates, thus discharging the battery! In very bright sun it might work, but in room light I have to remember to keep the solar panel side covered.
Well done Vince top man bringing interesting stuff along for Clive to take to bits, so he in turn can keep us happy with his technical videos and excellent reverse engineering of how it all works.
So, Vince is not just an artist, we have seen his doodles before, but he's a philanthropist as well.
That fan circuit was fascinating! Impressive reverse-engineering skills! I really enjoy this channel and learn a lot from it -- thanks so much, Clive!
I've always known those "figure 8" connectors as Telefunken. In the '80s pretty much every radio/cassette deck or small TV had them as a sort of standard universal mains flex. I worked in TV/VHS repair back in the late 80's early 90's in the UK and always called them Telefunken. Mind you we worked on Grundig tellies too.
I've only recently heard of Telefunken being referred to as "figure 8" or "infinity" cables. I think someone from 8chan (aka infinity chan) is trolling wikipedia with that infinity thing.
infinitechan is offline at the moment while the owner finds a new service provider. Some very interesting information has been posted on /patriotsfight/ which has shown us how Alphabet Inc manipulates the media.
well they are still today a very popular low power ungrounded mains appliance cord.
@@urugulu1656 They have given birth to the "cloverleaf" connector which is much more grounded.
There's no ground on the fuckers. Dangerous 💥⚡
@Indosarnia so your saying if thoses connectors had a gound/earth wire you would be dead. Is that what your saying...
Thank you, Vince!
China, Inc. is usually pretty good at minimizing to the bare minimum. I am a bit surprised the LED selector switch uses two 4.7 Ohm resistors, where one resistor would be sufficient (both LEDs can’t be on simultaneously, or can they?). I suppose that gives some flexibility for a future design change where the two LEDs require different current limiting resistors. The fan disable is actually kind of clever, I like that. The other missed opportunity is they could have used a two chip LED and saved the need to have a blocking diode on the solar panel; hard to say if a fancier LED or the extra diode would cost more.
Who else realized from the get-go that Clive forgot the second bottom screw?
I come along these devices while looking through gearbest etc. Always wondering if they are any good. Now I know, thanks Vince and thanks Clive.
This man's voice has been rumbling my subwoofer for the past 16 minutes.
Ahh! Finally, at last, a cooling fan! Just what yer need in Caledonia!
Don't go to northern Australia , she don't drop below 30*C.
Where this ?😎
@@arandomguy4478 Real degrees, not freedom degrees.
FULL BRIDGE RECTIFIER !! (RUclips recommendation leads to an ElectroBOOM episode ) :D
I have just ordered 2 of these from Fruugo. The colour is brown which will be more suitable for my decor than the blue one shown here.
I REALLY believe in a harmonious colour scheme.
35.95 European Currency Units each.
3:01 I like the expression "charging mouth"!
I've always wanted an awkwardly shaped combined torch+fan+floodlight with a small weak solar panel to lug around when I go camping, this looks perfect!
Please do a video one day explaining what a bridge rectifier does, they seem to be in most things you take apart. While you're at it do smoothing too!
Good engineering, reverse or forward. Thank you for sharing.
Why didn't they just use 1 x 4.7 ohm resistor before the switch instead of 2x after? Would save a few pence.
Probably to allow different resistors for different lighting configurations.
Hey, that's my comment ;)
When the switch fails and turns both on simultaneously, though!
@@JasperJanssen Quite possibly not possible !
I have had 2 of the power failure lighting units with the same looking sealed lead acid batterys in them, and they both would over time , say 6 months to a year eat the wires off where they attach to the battery's. I would clean the battery contact and snip off the wires and solder them back on only to have them get eaten off again in 6 months to a year. So there is some out gassing happening right where the battery contact posts are located.
looked up the Datasheet, the transistor seems rather special, with a 6 V Base-Emmitter voltage.
Edit: OK, you were correct, it seems like this was the maximum (breakdown) voltage, not the operating voltage. So forget what I have said, it is indeed a generic NPN
make sure that you got the right one b/c i know that transistor (got it at home) and its everything but special.
also keep in mind that even though it says d882p on the to package its a 2sd882p...
Rubbish, nothing special or spectacular about it.
Are you confusing base-emitter voltage with *reverse* base-emitter voltage? It’s just a very popular, standard, medium power transistor like the European BD13x ones.
Hurrah to Vince for an interesting purchase.
The resistor 1k2 max is also required to limit the base current other wise you would connect the 4V across the base and when the fan disable kicks in it would be a short across the battery,
If I were to hazard a guess, I'd say those four diodes that all do different things were probably grouped in that way in the same place for ease of assembly. These through-hole technology (THT) components were probably soldered in by a low-paid human. I know there are pick-and-place machines and soldering robots that can install THT components too, but I'm guessing this PCB had humbler origins w/o anything as fancy as that involved.
Thanks, Vince!! I love that battery, as well as the design.
Ah, good ol' Cashies; a garage sale with dedicated business hours. DankPods would be proud.
It would be perfect soldering fumes succer, just swap the polarity on the motor ;)
Or, y'know, just turn it around ;-)
@@theskett well, I also want to use dat nice light ;)
Great idea!
Sucking would be more helpful, I would just add Carbon filter and bang! no more fumes in my tiny room
@@BSOE3058 yes you could just turn it around and put the filter on the back
I miss wandering around aimlessly for hours at the electronics market in Singapore. I hope Vince got to go. How bout a lithium ion modification.
Hmm, not very many comments from folk who are keen to rush out and buy one. It's a sort of torch (but too big), a fan (but too weak) and a work light (but too fragile) - the sort of thing my granny might have bought me for Christmas.
Enjoyed Clive
I'd advise the rubber glove trick for the smoke detector if it's a major concern. Just rubber glove over the detector, large yellow gloves
Or a sock.
Tissue paper. They had them in jail and lads who "smoked" used tissue paper stuffed into them. It works.😤😥😧😊
Shower cap works a treat too.
I do commercial fire alarm/detection, and it's totally not kosher, but cling film/saran wrap, masking tape, a shower cap, a rubber glove, or just about anything can be used to cover over a smoke detector. Be sure not to remove it, as that'll send a trouble signal to the fire alarm panel, and be sure to take your obstruction of choice off of it when you're done taking apart random electronics.
@@carpespasm the ones in prison don t set the alarm off when you are just smoking normal tobacco but they do when weed was smoked!! How do they work?? Can they be sensitive to certain types of smoke or something? ?,
I must admit, I use these videos to help me sleep, your voice is so soothing 🙈
A lot of people use them to aid sleep.
#BigclivedotcomASMR
...just don't leave it (in your dream) plugged in, unattended.
Cash Converters International Limited is an Australian retail pawnbroking company
...... You forgot 'Loan Shark'.
Huh. I spent my entire life assuming cash converters was only a New Zealand company.
@@qwertyasdf66 no there in alot of country's look at the wiki article on them
We have them in the UK as well, sort of mainstream high street fence.
They have a presence here in Canada, as well.
I want a few of these for camping. Very cool
i think i suddenly realized why the similar light, i found being thrown away, did blow up!
the sla just dried out and went open circuit. that removed the only voltage stabilizer from the circuit and led got ~300vdc. explains black spots in that package and, iirc, red charging led being split half with force of the mains
i guess that was only reason it failed...
If one forgets to turn off the fan while on it's lowest setting and begin a charge, upon removing the charger cord, with the fan not rotating without a bit of a nudge, does that stress the circuit, or overheat the fan motor because it's not rotating?
I think the current is limited to a low enough level at that point not to be an issue.
If heaven exists, it'll just be a constant looped compilation of all the times Clive ever said "zing" :)
Somewhat Weird Form Factor but I would think quite usable ?
Great video big Clive
What a cool little yoke!
Thanks Vince, appreciated.
Cash converters is an Australian company. This looks like it's in AUD. Not Singapore
how about those electric generating camp stoves that turn the fire into heat? would love to see that broken apart
AvE has you covered. ruclips.net/video/PYYw1cYS8o8/видео.html
Here's an idea for a video!! An electric kettle. Unless you have one already. But I don't think anyone has done one on a kettle. Sure would be interesting to know if it's worth using anything in one for anything eles. ..
You're only late by three years... ruclips.net/video/k-HommnQ2_s/видео.html
Hello guys, I'm really interested in electronics but I got no clue of basic knowledge to understand this. Can someone recommend a series of videos or a place where I can get some basic electrical knowledge to understand these stuff? Thanks
just watch his previous videos :)
More Clive videos; his older ones. I had no idea when I started watching, either. I've been watching a while and I still had no idea what the fan circuit was doing until he explained it, so this circuit isn't the easiest one to understand.
You can start with Clive's "A simple guide to electronic components"
ruclips.net/video/6Maq5IyHSuc/видео.html
Lominaty Spy you could have a look at Owen Bishop Electronics a first course its a book which is like the internet but made from a tree !
I'm guessing the fan starts at high because that's what most fans do. If you buy a box fan, oscillating fan, tower fan etc and it uses a knob for power selection, it usually goes Off, High, Med, Low.
It's to give them a boost at full power to make sure they start.
This is so good, it's bad... It's sacrifice was worthy.
Pretty easy to put it all back together, looks like... and I'm sure he probably did.
>thumbnail
meh
>capacitive dropper
go onnn
That discharge "zing" is something I get quite often from a lot of notebook chargers, mostly fujitsus, but also some older lenovo ones.
“12.90 Singaporean dollars, I presume”
Yes Clive, we use dollars here.
Still enjoying your cat phone sir...😀
New desk Clive. You've changed ;)
Temporary work related accommodation.
So it states "don't use while charging cause possibility of electric shock" yet it wont let you use it whilst charging? Also would fan disable also kick in charging from the solar panel?
I wonder why they didn't just put one 4.7 ohm resistor before the selector switch instead of one on each leg after.
Probably so they could use different value resistors.
Yes, there's a free resistor there. Just think of it!
Cut that trace, move ONE 4.7k and remove the
other one (for the spare parts bin). Add two
jumpers and you're good to go. lol
It's a bit odd that they did not use a 555 timer chip, or perhaps a 556 dual timer chip, to slow the fan and provide dimmable light, both efficiently, by using the PWM capability of the venerable chips... which also have a significant current drive capability, all at quite low cost.
Thanks Vince !
But my own battery doesn't last. What can I do. Once I one the it goes off in 15 minutes
If the LED series resistors are both the same value why two? One less component if the resistor were between the power and the central arm of the switch. There is no facility for having both LED lamps on at the same time so no need for two resistors.
As soon as I saw this device, the first thing that came to mind was a similar camping fan / light which was smashed to pieces by Kenny (Smashstuff30) with a golf club, and then he commented about the obliterated fan: "What happened to your twirly fantasticness?"
I have one but I hardly see them around anymore. I only see one on eBay. I would like to fine out where to get more
🇫🇷👍👍Thank you 👍👍🇫🇷
Clive, you mention capacitive droppers quite a lot. Could you do a vid explaining how they work in your inimitable style...please?
Tbh if this was made with more quality it would be awesome for soldering
What is the solar panel's short circuit current, and open circuit voltage
No sun to test it right now, but the voltage will be around 6V and I'd estimate the current at 100mA.
Lovely display of 'Bits'! Thanks Clive! - Thanks Vince! *Sound the CANONS for me\ Us.* : ) ~- *
;p nice display, and oh! I see what you did there aswell. dhn
I had bought a chinese trimmer and yesterday decided to open it just to see how it charged its 1.2v Ni-Cd battery from mains with all the circuitry inside. I opened it and understood nothing(Not that good at electronics lol), but it had very few components. Later I saw it was charging the 1.2v battery with 4 volts and was wondering if that was safe?
Cash converters is a New Zealand 2nd hand/Resale shop.
OZ too.
UK too.
Are those currents calculated, or realy measured? 7Ma through a LED in the 30-Led Array seeems a bit low. How do dey get so much light out of that?? I wonder how much current the Fan will draw on various settings.
It only takes few uA to visibly light a modern InGaN LED._
would it over charge the battery if left plugged in too long. There does not seem to be anything to regulate it.
Sealed lead acid batteries can tolerate trickle charging.
At first I thought it was one of those car ventilators that blow the heat out of your car on a hot day, but then it’s. What? Who was the target consumer for this product? lol.
Could be rather useful for soldering, using the light to illuminate what you're bodging together and the fan sucks the flux vapours away (or toxic fumes in the case of the unleaded nastiness), handy gift there... :)
just gotta add a sheet of activated carbon onto it
@@urugulu1656 I have seen the same design fan but without all the light and solar gizmo, it is for blowing away solder fumes.
THAT is a great idea! You could even add a switch to make the fan reverseable. Also might want to add a thin activated charcoal filter to deal with those fumes. Again.... great idea!! 👍
The fan is disabled so the battery charges faster (or at all)? If I wanted the fan on all night, I'd happily leave it on but charging slowly. Unless there's an overcharge problem?
I'm wondering about the motor's voltage rating. 5 volts?
13:40 thats some quality fanspin there.
but is it as reliable as an Apple motherboard repaired by LR?
Two bridge rectifiers? Surely you could have used an echo effect?
WHY does the fan spin up to high speed for a second or 2?? You DID NOT analyze why that occurs!! Please do.
It starts at the highest speed when you turn it on and as you turn the knob further it slows down. Most fans start at full speed to get them running.
@@bigclivedotcom Thank you
The power switch really reminds me of the one from the super nintendo!
Someone on r/functionalprint has just recently posted a fan they 3D printed that looks basically the same but purposed for a mini fume extractor for soldering
Is that a shaver adaptoror a 13A one 🤔? Love your vids
Not sure about Singapore, but here in Australia they are a notorious second hand shop.
And in the UK. Notable for selling stolen items.
@@bigclivedotcom"Procure" $100 item from retail shop, walk to a "cashies" just down the mall a bit, sell to them for $10, cashies then sell it for $60.
..... And 'Loan Shark' !
Is he trying to make up for defiling your calculator in a hilarious way? I just started the video... I am hoping he put some artwork inside the light :)
Clive why does the usb cable on my Samsung phone chargers trigger my voltage detector probe rated 90-1000VAC? Im scurrred.
There's a slight AC coupling from the input to the output. The voltage detector is sensitive enough to pick that up.
Use one of these at work I have 3 of em just with out the light really good but they eat battery. Have power bank plugged in to keep charger
Wait so they have a diode directly connected across the rectifier? That's not safe right
Interesting little battery would like to know more about it great video keep up the good work.
That looks like a 4 Volt, Sealed Lead Acid battery.. Probably 1 to 1.5 amp max(guessing based on size?)... Very common where I live.. costs around 75 cents to $1.20 for a 1 amp.
"CVT switch" is a wonderful new term, from the box.
doesn't the 1K2 resistor in the fan section - connected to the pot also limit current thru the pot?
Technically it does, but this doesn't mean anything to the circuit.
@@B-System Then why include it? I
I guess then, the Achilles heel is the battery? - my guess being that they're not exactly something you'll get off the shelf at Wilko (or Pound Land)? So once it's dead, it's dead - an ex battery, snuffed it and nailed to its perch, if you see what I mean, so Clive, your mission, should you choose to accept it, is to modify the device to take NiMH, or Li-Ion? 💥
It could be fitted with three NiMh directly at 100mA charge current.
The thing is, lead acid batteries are very hard to kill. Depending on why they died, they can sometimes be revived by adding water back to the cells
Would have liked you to have positively confirmed the battery chemistry.
(Or negatively not confirmed the battery chemistry.)
I took one apart in another video. Chunks of lead and fibreglass soaked in acid.
Solar >> trickle >> SLA, no?
@@michaelthibault7930 Solar only needs to provide up to 14·6V through a diode (for a 12V battery) = no issue.
I often see comments on 'fancy chargers for LA batteries - but they actually look after themselves - give 'em 14·6V and let 'em soak up the current as they need it.
Obviously multiply the difference according to the actual battery voltage.
In the United States “cash converters” is a chain of pawnshops lol
I have a question regarding the capacative dropper. But if you answer please keep it simple.
240v @50hrz from the plug goes into the dropper, I'm ok with that part.
After the bridge rectifier we'll call it 12v @50hrz, I get that.
But as I understand it the capacitor acts as a diagram pump, without letting the actual current through because the frequency is higher than the capacitor can react to. (Ish).
But when a discharge resister is placed into the circuit. What stops the current bypassing the capacitor through the resistor and letting 240v through?
In my head it makes no sense having the capacitor if you have a resistor.
Hopefully I've typed this in English, and thank you for your answers. 😃
The resistor is of high enough value that it passes very little current. use an ohms law calculator.
@@simontay4851
Thank you for the answer. That makes sense in my head. 👍
Is it just me or would that make a good Soldering station "Fume extractor"- I don't use one but I know i'm supposed to. (Just like how your not supposed to drink, walk on the wrong side of the road, J-walk,etc.)
Honestly, you don't even need the 'extractor' part of the fume extractor if you're not soldering full time. Just get a PC fan and let it suck the fumes away, and have some ventilation so that they don't build up inside the room.
Cash converters is in Australia. If that was in Singapore I'm guessing the sticker would be different.
It's in Singapore as well- I have seen it myself when I was there!! google earth this :1.37deg N 103.85degE
Oh wow cool. I just bothered to check. cashconverters.sg . They are in 24 countries. I'm just surprised they use English on the stickers. Then again it is Singapore.