Inside pink shoe/boot dryers/warmers with "UV" sterilisation.
ฝัง
- เผยแพร่เมื่อ 3 ก.พ. 2015
- There's nothing colder than wet steel-toecap boots at sub-zero temperatures. So I went online to see if I could find some boot heater and dryers. A whole range came up, from the nicely designed American Peet boot dryer to the clumsy looking heater and hose versions to the little mains powered ones that push into your footwear.
I was particularly intrigued by the UV sterilisation function mentioned in some of the Chinese listings. This can be achieved with germicidal lamps that use a mercury vapour discharge in a quartz tube to generate shortwave ultraviolet light that has a direct sterilising effect and creates ozone. (And is an eye hazard if viewed directly.)
I was secretly hoping that these units would have the mercury vapour based lamps using the heaters as ballasts. But its just two blue LEDs with a less than stellar power supply pretending to be UV.
The heaters are based on PTC (Positive Coefficient Thermistor) blocks that self regulate by increasing their resistance as they get hotter. They have interesting resistance characteristics, since they have a lowest resistance value of about 1000 ohms which actually increases as they get either hotter or colder. This makes sense, since if their resistance kept going down as they got colder, then they could experience quite a high current flow in freezing conditions. In a cold house they measured almost 3000 ohms. This means that when they are first connected to the mains they show a modest current that increases and then decreases as they heat up to their state of equilibrium. When they stabilised at about 10W total (for two) that equated to an equivalent resistance of about 12,000 ohms each.
The peak central temperature on the heater assembly was around 150C graduating out along the metal dissipation plate to about 80C.
While not having a real UV sterilisation function, these units are actually well worth buying for the self regulating heater assemblies.
"Start to dry the shoes before you sleep at night and you will surely be dead in the morning.", you Mr BigClive are a genius and should start writing manuals.
snorted like a pig when he said that
I've learned more about practical electronics theory from watching your channel for eight hours than I learned in four years in college...
@Crazy Horse Evidently your college curriculum did not include spelling :-))
I just had a thought. I might be looking too deeply into the inter-resale relationship with some of the people you buy from, but maybe, just maybe one of them sent you lace as a rather subtle way of telling you to strangle yourself, for interfering with their business and causing not just their reputation to go into the shitter, but also cause them to not have their items bought.
Or maybe it was just lace sent by mistake.
Its rainy season here in the and good thing i found your 2 vids for shoe dryers. Im getting the same model as the above vid rather than the one with an exposed metal plate at the bottom!
It's currently 2:30 AM I have work tomorrow and I'm watching a video on shoe warmers having blue LEDs instead of uv lights what am I doing with my life
Lucky you. I'm 62 years old telecom engineer and automation electrician. Also I'm a logistic and a bartender. But I have bum back and every HR person thinks that a 62 years old knows nothing. I'm coming to the conclusion that a HR-person does not need to know anything they only need to know how to read buzz words(1). But of course CVs are something they just do not understand.
(1) I know this because one HR person told me that the job application clearly stated that the person applying for it needs to know SAP. When I told her that the position is for telecom engineer and I know how SAP communicates with other systems, I was not eligible for the job because I did nort ihave a certificate that I can program SAP. I told her that the job clearly is not trying to get a SAP programmer but a person who can make SAP communicate with other systems. She did not ujnderstand a word I said but clerly could read the word SAP in the requirements paper. Everything else in there could have been hebrew as far as I know, she didn't care a shit about the other things.
ive been binge watching for days now hahaha this is one smart dude !!!
to dry my shoes i use silica cat litter
5kg for $5 + ebay pantyhose to make small packets
I like the choice of colour.
I always go for the most lurid colours. It's even more gratifying when some piece of gaudy "Hello Kitty" stuff malfunctions explosively.
bigclivedotcom Me to. I have an FDC FD460 2-way radio I purposely ordered it in RED... I also been re casing my Motorola HT1250's in bright yellow.
I've been watching some of your videos. I'm assuming your channel surrounds the disassembling of death traps? :P
+CaffeinePizza he's basically the bomb squad but for Chinese junk.
The glowing housings alone are worth it... they scream 'creepy cyberpunk-Barbie Halloween pumpkin clown doll' to me...
"Ambidextrous hot pink computer mice, not really."
THIS ^^^ GETS ME EVERY TIME.
Stuffing boots tightly with scrunched newspaper dries them out nicely overnight - the paper seems to wick the moisture out of the leather / fabric. In the morning you've got dry boots full of wet newspaper which you can pull out and dispose of.
Free newspapers (full of adverts) are still available at least in my area.
Yeah well then they won't be nice and toasty warm :)
The mixup happened to me as well :) I ordered few small solar panels and a string with leafs came instead... :)
White paracord. Very handy.
***** to re lace up your boots after the warmer/dryers burns the old ones off..
"Start to dry shoes before you sleep, and you'll surely be dead in the morning." Bahahahahahah! Sounds more like it. :D
i was wondering where was the hopi and the stylish wooden table then i realized the video is from 7 years ago thanks youtube algorithm
It occasionally throws a wildcard.
"...and you will surely be dead in the morning." XD I died.
If you died how did you write that comment?
Reincarnation. ;)
Was the elements coupled in series or parallel?
Always fun to watch your videos. I'm working as an electronic technician (mostly audio and video) and I do dabble with some electronics as a hobby too. But mostly small stuff like LED lights for LEGO models and such.
+F0NIX Hi. The heaters were in parallel.
Is it a good idea to put mains electric into wet steel toe capped boots ? mmm I will give that one a miss.
So, what was that package of uncut shoelaces supposed to be? Several times in the past I have received the wrong item when ordering overseas. It is quite telling on just how cheap things are when they do not even want the stuff shipped back!
Do you know where I can get decent UV LEDs for my maglite torches? I have a couple Cree ones which I don't think they manufacture anymore...
according to electrodroid and my local shop... they are standard resistors.
0:01 - "Ambidextrous hot pink computer mice..." After watching the video I think they might be better used in that capacity. :) The only thing I could think as a "good" use for them would be to sew it into a contoured cushion to rest your feet on. Of course, the temp would have to be well regulated down from 80°-150°C (~176°-302°F). :)
750 ohms is an E24 series value, i.e. 5% or better. (E3 resistors are 50% tolerance 1.0, 2.2, 4.7 etc.; E6 20% and E12 10%, the values are all logarithmically spaced evenly)
Is that see through plastic around the product, where the light passes through?
Can't tell from the video but possibly they are high UV leds as in nail dryers (and PCB exposers) 395-405nm or so, not going to do anything to kill stuff, but the chinese manufacturers wouldn't care/know, it's still UV.
They're very bright for the current from a 100nF cap. If they were even remotely near the UV spectrum they'd be a lot dimmer looking. The box doesn't make any suggestion of UV sterilisation other than having "UV" printed on it. And that could mean UV reactive pink plastic. (it does glow in UV)
Probably a safer alternative would be to get two large microwaveable silica gel packs (e.g. 2x500g), shove one in each shoe and place them in a plastic storage container with the lid on overnight, then microwave the packs for the following night.
I remember once coming across a dehumidifier with a detachable split hose for drying a single pair of shoes. While I'm sure that would work, it did make me wonder show smelly the room would get with a steady stream of air blown out of the shoes.
It's all about the warmth. If the footwear is cold it may not relinquish the water content easily. The Peet boot dryers use low power heaters with the footwear placed upside down over a couple of pipes. the hot air slowly rises up into the footwear and then carries the moisture out as it cools down.
I ABSOLUTELY LOVE random shit sent from China! I ordered a Wouxun KG UVD1P radio back in 2011 and they sent me the radio and a set of 25 LED tea lights all in the same box!..
Love the 100 foot shoe lace tho nice..!!
This was marketed at the US market of 120 volts (Note the 120 volt 15 amp plug)
They do make UV disinfection LEDs BTW.
I would change out the cap to one better suited for the 240 UK mains before actually using them though.
That's not a 120 volt plug. China uses plugs that look similar to North America's, but notice theirs don't have holes in them, and they're not polarized. At around 4:51 you can clearly see they are the Chinese plug type.
Well, at least the LEDs are wired such that one lights in each half wave, to provide a less flickery light output. I guess nobody would really do it any other way though, since it would be flickery as hell, skipping every other half wave.
what was the string supposed to be?
Tron shoe warmers!
They do look very Tron-ish. The first time I turned them on the tune from the Tron video game popped into my head.
have you found one of these that works well and has uv sterilization for real?
Reminds me of the "Death Trap" bug zapper. Which I ended up buying just because bugs are attracted to light any light. But those were also BLUE LED's. Wonder if someone in China is colour blind? (not to offend those who actually are) (either that or they've been watching too much Terry Pratchett and Rincewind has been mucking about their colours :P (bad attempt at humour if I'm using British U's and the Colour of Magic which I prefer that spelling because it's a British movie/television movie (Sky One?) ie a major pain to get the first 2 Pratchett movies on blu ray. Have the Hogfather on a Spanish Blu ray which is clearly in PAL . Which laptops play but lcd or crt tv's in NTSC do not. but The Colour of Magic eludes me :(
BC -
I watched the two videos on the shoe dryers and the one about the glowing pebbles, which was sandwiched between them.
In the first one you dismissed the "UV" lights as nothing more than a couple of blue LED's. And you sketched out the tube necessary to make an actual UV light.
But in the glowing pebbles vid you pushed what you referred to as a UV led down into the mush.
What happened ? Are there actual UV leds ?
But in the glowing
There are deep violet near-UV LEDs and also now real UVC LEDs, but the germicidal ones are specialist, expensive and low power.
75x value resistors are standard in 5% and 1% tolerances, just not in 10%
lol..proper ultraviolet would damage the plastic housing,thus destroying it.
like that is a design factor... also they do make 365-405nm LEDs do they emit enough to sanitize no but even the radio shack ones will cure uv resin...
Did you ever find out what that parcel/package was supposed to be?
It was supposed to be lamps.
Cool LED ones?
Sadly yes. But they refunded and I ordered them again.
Also the shoelace thing just gave me an idea to use heat shrink to replace those stiff bits at the ends of shoe-laces
Hmmm, I wonder if there is custom design shrink wrap you can buy? Could start making custom shoe laces....for what its worth lol.
actually you need UVC light for sterilisation which is roughly 245nm.
And until now there are no leds that can emit this wavelengh with enough power to kill bacteria
just saying
+Bullshitvol2 I actually found some that emit 280nm (which is suitable for sterilization)for sale they weren't cheap though: $171.61 (US) for a pack of ten from a particular supplier I don't care to link. simply google "UV led" or something similar such as "UV LED sterilization" or "LED UV-C"and you'll find lots of different suppliers.
Horrible Hebrew
No its not. You see that's the thing: Biological life gained a resistance to UV light during evolution. Because of that we have to use light that doesn't exist on earth (filtered by atmosphere). So while you are technically right and UVC light starts at 280nm you're not going to have much success with that. At this frequency light just doesn't have enough energy and/or bacteria have still significant resistance to it.
+Bullshitvol2 thanks for the information, I'll do a bit more research.
Horrible Hebrew
No problem. I checked this because I wanted to build LED sterilization for my Saltwater Aquarium, just to realize that I still need a Mercury vapor lamp for that
Yeah that's definitely a 120V unit. The plug's a standard NEMA two prong xD
+Alex Barlow
I'm not quite sure if a connector type allows any indication of the voltage rating for the device that it is connected to.
I made this comment before I knew that China's plugs were the same, and ran on 220V instead. Generally when it comes to flex plugs, I find, they are at least indicative of something.
Do you downrate sellers when their products don't do what they're advertised to do? Like this one that isn't actually UV.
Is it not possible that those are UV LED's?
UV LED's (at least all the ones I have seen) have more of a purple look to them and they will hurt your eyes if you just glance at them while on like the Sun and tanning bulbs.
I had some cheap UV LED's that I used in my computer with some UV tubing (liquid cooling), as well as sleeving, connectors and some paint (I etched the acrylic window and squeegeed some UV paint into it), and they looked very similar to this, well, until most of them burned out, in addition to some nastiness that occurred to the Flexible PCB and the IP67 silicone/epoxy waterproofing that was clearly not UV resistant, which boggles the mind... Fortunately the tubing, sleeving, and connectors I made were fine and did not suffer the same degradation...
I just noticed how he seemed so confident that they are not UV, but did not actually test them in any way, and my experience with cheap UV LED's has shown me that they are not always quite the same in appearance, but can output a similar amount of UV light despite having a different color cast. I've even seen some that were hot pink, but caused UV reactive goodies to fluoresce like mad!
That being said, given the relative junk poor Julian often ends up with, I would not be a bit surprised if these were not casting an UV whatsoever... lol
Do you think the USA has safer appliances and electrical systems then your country ?
No. Just different styles.
Check the tracking number on the packaging, I got shoe laces instead of a electric lighter lol
> 5:40 touches the plate while it's plugged in
AAAHHHHHHHHHHHHHHHH
Well, steel-toe-cap boots are a death trap for toes anyway. Someone I knew wore them while motorcycling, then went down with his right foot trapped under, he lost his big toe :'(
Myth busters did an episode on that. They are completely safe for things dropping on them.
Ayciate :3 Well, apparently not all of them in all situations because my friend actually did lose his big toe because of a bent/torn steel cap in his boot trapping his big toe. Of course I don't know what would have happened to my friend's foot if he wouldn't have worn steel toe cap boots, it may have been much worse :) What I understand happened is that his foot got trapped under his side crash bar while his foot was sideways on the ground (as may happen if you wipe out into a lowsider while cornering at a heavy lean angle), so it didn't actually drop on top of the cap but on the side, and the side of the cap took the full impact of about 200kg of German engineering coming down with a lot of force... Then the side of the cap apparently bent inwards and cut into the part where his toe started. Then it took quite a while to get him to the hospital, they removed his boot and had to amputate his toe :'(
Ayciate :3 Interesting though, thanks, reading through those mythbuster results now, I kind of developed a fear of steel toe caps after his accident, but apparently they're not as bad as they seem :) Thanks.
Atleast a foot wasn't lost :)
Just think of what would have been lost without the toe caps. On the railway in the UK they're absolutely necessary, and I've not had a single problem in 19 years.
Ozone from UV leds??? LOL
These are UV leds, and they emitt UV, but not much.
hahaha (@ambidextrous pc mouse)
false advertising. should complain back to the seller and see what they say
Why another 7 year old suggestion?
I'm not complaining I'm just wondering why
TH-cam moves in mysterious ways.