Julian's Postbag: #54 - USB Warmers, OLED Power Meter

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  • Опубліковано 10 гру 2024

КОМЕНТАРІ • 107

  • @agarceran
    @agarceran 8 років тому +6

    Was kind of expecting to see those heat pads run with the usb doctor or such to see what they consume.
    Also, I think the 2 amp and 1 amp outlet from the power bank are there as a convenient way to select how many amps you want to feed to your device. I would not expect to be using both at the same time at full power.

  • @proyectosledar
    @proyectosledar 8 років тому +14

    Now I have to buy that Electrical meter. Thanks my friend.

    • @MiggyManMike
      @MiggyManMike 8 років тому +2

      +Proyectos LED Thanks to Julian I learned of banggood....... Thank fuck they're on holiday :p

    • @MiggyManMike
      @MiggyManMike 8 років тому

      I know, kinda what I was getting at :p

  • @iamdarkyoshi
    @iamdarkyoshi 8 років тому +6

    Once the switches fail, I would suggest soldering a pin header on them and just use a jumper

  • @RSOFT92
    @RSOFT92 5 років тому

    07:03 You're right, they are called CCTV-Plugs because CCTV-Cameras (at least the older ones) had just connectors for wires (kinda like Wago-Terminals).
    10:10 Adding a wire in between the Resistor and the Meter would add additional resistance wich would lead to a wrong measurement (A Resistor with Wire and plug (JST-XH, for example) would've been better, because you could attach it to a component when the meter is used inside a housing (e.g. a Power Supply))
    Cool Postbag, keep'em coming! :-)

  • @GadgetAddict
    @GadgetAddict 8 років тому

    I have a video on my channel about those dummy loads. I used my Flir One to monitor their temps. I've got another video going live in the coming days where I try to cool them down by using a heatsink and fan. Out of the box, they get up to 120C within a couple of minutes, which is the top range of my thermal camera.

  • @jlucasound
    @jlucasound 5 років тому

    If you are careful, that offset within the display can be corrected. I do love those types of displays.
    (Edit) I spoke too soon, didn't I. I should have known you would not tolerate that misalignment. Love your style Julian!

  • @PotnoodleUK
    @PotnoodleUK 8 років тому

    Woo hoo I received the OLED meter today, it's quite cool innit. Thanks for finding that Julian I like it.

  • @krisztianszirtes5414
    @krisztianszirtes5414 8 років тому +2

    5:30 Well you've just got a *USB warmer* with a resistive pad you can plug into it :D

  • @DeeegerD
    @DeeegerD 8 років тому +4

    Hi Julian, I don't think you are reading the outputs on the power banks correctly. Although one is rated at 2.1A and one at 1A, there is likely a total of 2.1A available. Thus, when you draw 2A from the one port you have maxed it out.

    • @jusb1066
      @jusb1066 8 років тому +1

      +Digger D yes very likely a single dc converter rated for 2a, with different resistor signalling 1 or 2a port, although my own powerbank runs very hot indeed above 1a, i dont think it can really cope with 2a, plus the voltage drops too much to really get the 2a.

  • @DupczacyBawol
    @DupczacyBawol 7 років тому +1

    6:50 What exactly MCU uses the OLED multimeter?

  • @metallitech
    @metallitech 6 років тому +2

    Alice? Who the F is Alice?
    ... oh, it's Mr. Li Tan Sheng.

  • @-yeme-
    @-yeme- 8 років тому +1

    re alice = li tan sheng?, Ive got this habit of checking out the origin of oriental ebay purchases on google earth and Ive noticed that lots of cheapo electronic things I get from various well known hong kong sellers (the bag Ive got right now which had a power bank in it is from lakeyx101, but also the likes of delhanway, finetech, sayhello etc) are id'd on the bag as coming from a mr yuan in flat 7e/f, industrial buildings, 20 wang hoi road, kowloon. but I also recognise that tower 2, century gateway address and I dont believe Ive ever bought from alice. also I occasionally get things from delhanway (all listed as item location = hong kong) arriving from an address in vientiane, laos.
    so theres either two hong kong ebay overlords, mortal enemies no doubt, one based at century gateway and one in wang hoi road who both control multiple seller accounts, or perhaps more likely the various sellers are using common warehousing and/or mailing services.

  • @MYNICEEV
    @MYNICEEV 8 років тому

    Awesom my friend. Got one in my basket ready to purchase on monday. I have been looking for something like this for my QXAs. On my solar lighting. Thank you. have a great day tomorrow.

    • @1981dasimpson
      @1981dasimpson 8 років тому +1

      +Raymond Earle damn thats better then what we where looking at the other day that just showed voltage and ampage

  • @EastyUK
    @EastyUK 8 років тому +1

    those heaters could be nice sown in a layer you can drop into your motorcycle jacket and plug it into the bike. That meter came with instructions, it must be way above the usual budget. :)

  • @anthdci
    @anthdci 8 років тому

    I bought one of those heater gillets for my wife a couple of years ago for quite a bit more than £10. The battery life means it has sat in the cupboard for the last 2 years but I'm curious of switching the batteries to 18650 lithium packs to see if I can improve it. The battery boxes just have 2.1mm sockets on them so it would be easy to change.

  • @danijel124
    @danijel124 8 років тому +1

    I am currently making / testing two hand warmers i made using four 10 ohm ressistors :)

  • @Luke-san
    @Luke-san 8 років тому

    For our Russian and Canadian friends, the USB power resistor testers can also be used as feet warmers ;-)
    Should get a list of stuff you test before you post your youtube video Julian, every nice thing that you test is always out of stock after you publish it.

  • @reggiebacci
    @reggiebacci 8 років тому

    It looks like the wires to the heater pads have a greater resistance than the elements themselves. It wouldn't surprise me if they've used aluminium or steel wire rather than copper. John Ward has got a thing about this - see his dangerous multi-way extension videos.

  • @BenjaminGoose
    @BenjaminGoose 8 років тому

    No doubt the warmers (something I considered getting recently) use wires with thick insulation but very thin conductors (and possibly not even copper). You could probably boost the efficiency of the pads quite a bit by changing the wire.

  • @iceberg789
    @iceberg789 8 років тому +6

    what is the power rating of the feet warmers, you could show them with one of those usb energy meters/doctors.

    • @jusb1066
      @jusb1066 8 років тому +2

      +iceberg789 yep i am surprised he didnt show the obvious!

    • @Eratas1
      @Eratas1 8 років тому

      +jusb1066 Same here. Warmer wattage please :)

    • @dekelprat8853
      @dekelprat8853 8 років тому

      +iceberg789 ------> +1

  • @SimonDambro
    @SimonDambro 8 років тому

    Nice M8! I bougth the meter 3 weeks ago, ill use it on my PV. I've tried using the Wattmeters, but they only work as long as the sun is making enough power. This device should be able to give me data on several days.
    OMG, are we related... I also got the 1-2A power 'tester'. Mine got 175 Celsius... A bit to warm for me....

  • @mmmk1414
    @mmmk1414 8 років тому

    nice video Ms. Julian , i like you postbag day but i think you need to make projects with them , you have a couple of projects and i think you should make more :D

  • @jlucasound
    @jlucasound 5 років тому

    That, my friends, is the smell of Walkie-Talkies on Christmas morning, 1972. (They were Japanese made, back then). Ah...the Bouquet.

  • @abyssunderground
    @abyssunderground 8 років тому

    What kind of current does the power meter use just to run the display? I may get one to do the voltage/current/power display for my small solar system but if it draws too much power it's no good! Thanks =)

  • @drkastenbrot
    @drkastenbrot 8 років тому

    Where did you find that powerbank? Thats really useful with all those features.

  • @ethanmye-rs
    @ethanmye-rs 8 років тому +1

    Can you do more "component" type videos? Stuff like new sensors, interesting or obscure parts, or even dev boards?
    Or, maybe focus less on the features of these finished products and more on the engineering behind the devices?

  • @markgreco1962
    @markgreco1962 8 років тому

    I was having postbag withdrawals, thanks for the fix.

  • @JerryEricsson
    @JerryEricsson 6 років тому

    Have you had any problems with OLED screens going bad? I have had a couple now, one on a very fancy phone watch, this was pre-apple watch but offered some really great options along with video player and of course the mandatory bluetooth audio player etc. After a couple of years the color OLED went all red then after a short time died. The same thing happened with my Archos 104 MP3 Player with a color Oled screen. It still shows in a dark room but not if there is any background light. Sort of like the old Military dim RED screens that would not give away a soldiers position by the red glow of his radio lights.

    • @JulianIlett
      @JulianIlett  6 років тому

      Yes, on an old Sony bluetooth speaker - can't remember the model number, something 200 - the OLED went really dim, almost invisible :(

  • @anthdci
    @anthdci 8 років тому

    Do you still have the USB warmers? If they aren't to be used is it worth testing them with a higher voltage maybe 2 18650s in series to see if they get warmer? That's what I want to try but shipping is going to be weeks.

  • @weirdscix
    @weirdscix 8 років тому

    Julain what rechargeable cells should I buy just for messing about with different circuits?

  • @SproutyPottedPlant
    @SproutyPottedPlant 8 років тому

    Those heating elements look like what Spirit and Opportunity has to keep warm on Mars!

  • @slm60uk
    @slm60uk 8 років тому

    5x USB loads for $6.05, or you could have brought them singularly for $1.03 ($5.15 total). The Chinese eBay sellers are always totally inconsistent when it comes to quantity discounts, so I always find it's always worth checking first.

  • @Polite_Cat
    @Polite_Cat 8 років тому +1

    would it not be possible to fix the alignment issue on that screen when you took it apart?

  • @topherteardowns4679
    @topherteardowns4679 6 років тому

    at the end of the video you say the resistors are in parallel, they are seriesed, if the were parallel, THEN they would be half rated. this is because it is esseniall stacking them together, and their cross section is twice as much, ergo, their resistance is halfed

  • @Autunite
    @Autunite 8 років тому

    I love the OLED displays and have been searching eBay for all of the cheap OLED meters. Shame that this listing didn't include OLED it seems.

  • @bangkokhomes
    @bangkokhomes 7 років тому

    Hi Julian another enjoyable and informative video.

  • @1981dasimpson
    @1981dasimpson 8 років тому

    i wounder if the yellow wire for measuring voltage also triggers the run time clock if so be good if it went solar panel side of the diode as this would show how many watts produced over x amount of time

  • @AdamWelchUK
    @AdamWelchUK 8 років тому

    Maplin must have been selling that jacket for at least ten years. I remember looking at it when I first got a motorbike, but I never got one. Felt that a couple of AA batteries weren't going to do much at 60mph on a cold January morning commute!
    The OLED meters look great. Added them to my watch list - I think they'll feature in the solar shed before long :-)
    What's the accuracy of the resistors in the USB loads? At the wrong end of a 5% tolerance could they be pulling more than 3 amps (I haven't done the maths...)?
    Interesting postbag - thanks.

    • @drkastenbrot
      @drkastenbrot 8 років тому

      5 Ohms - 10%
      4.5 Ohms -> 1.11
      Even at the wrong end of a 10% tolerance it would only be 1.11A

    • @AdamWelchUK
      @AdamWelchUK 8 років тому

      +drkastenbrot But as Julian was testing '3 amps' on a power bank labeled as able to supply 1+2.1a using your numbers that's 3.33 amps. 200mA over could be enough to trip the internal IC? It may be that a load like that causes the voltage to drop below a threshold.
      I'm sure as Julian intends to test power bank outputs with them, he'll take a more accurate measurement of the dummy loads. Easy enough with those posh ZYX studio charger doctors.

    • @jusb1066
      @jusb1066 8 років тому

      +drkastenbrot tolerance works both ways^ both more and less, to draw 2amps at 5v its a 2.5r equiv resistance, but yes its about 2.22 amps with 10 percent tolerance not the 3, but that can trip out a 2amp dc converter

  • @rjmunt
    @rjmunt 8 років тому

    How did you work out the controls of your white 4 cell power bank ?

  • @dl8cy
    @dl8cy 8 років тому +3

    you showed 4 packages in the beginning, but opened only 3 of them - What do you hide? :-)

  • @8bpspfreak2
    @8bpspfreak2 8 років тому

    Whoah, I almost bought that EC tech power bank, good thing I got the Anker with actual working 2x 2,4A output :D
    At first I was like "The EC tech is cheaper!" . Then, after reading the reviews for both, the Anker seemed to have extremely well support, even in my native language, but the EC tech one has pretty much 0 support and no answers on e-mails etc.
    \o/

  • @zaprodk
    @zaprodk 8 років тому

    My guess on those "CCTV"-power connectors: We have this cable which bundles power and coaxial video, if you camera don't come with terminals for direction on the back it probably have the generic 5.5/2.5mm DC-jack, which then plugs into the adaptor you have. www.gepco.com/pictures/product_pictures/cable_proav/video/coax_cctv_power.jpg

  • @kyoudaiken
    @kyoudaiken 8 років тому

    Strange I got two USB load sticks from alice1101983 with a rocker switch. These don't seem to have any problem with 2 amps.

  • @BladeScraper
    @BladeScraper 8 років тому

    How does one go about sending stuff to you? Do you have a PO Box?

  • @donpalmera
    @donpalmera 8 років тому

    You can get a programmable load for about $20. Got to be better than those green resistor things. I have the EBD mini v3.. I had to write my own firmware for it as it has a bug switching between the two different gains it can measure the input voltage at and the display sometimes gets stuck at 6v which is the top of the best resolution measurement. But... for these power banks that shouldn't matter and they even have some junky software to control it, plot the readings etc over USB.

  • @danielaustin7643
    @danielaustin7643 8 років тому

    the wire for those warmers will be dissipating quite a lot of the energy and may stop the heaters from getting as warm as they should, why don't you cut them off and replace them with thicker wire?

  • @mojikarimi5717
    @mojikarimi5717 8 років тому

    Julian love ur shows mate

  • @Wasserverschmutzung
    @Wasserverschmutzung 8 років тому

    I would put jumpers on these usb loads instead of wireing them for good. I love the power meter, could be useful for diy little power supply.

  • @Dunkelheit667
    @Dunkelheit667 8 років тому

    The post stamps just blew my mind. You're receiving stuff from China within two or three weeks in the UK? Your customs seems to be quick at whatever customs do. :o)

  • @lordofthebeltsthereturnoft1127
    @lordofthebeltsthereturnoft1127 7 років тому

    Julian it's useless saying LED screens vs LCD, as both are actually LCD. The first LCD's used like a fluorescent type back light and now the newer ones today use LED back lighting and they call them LED monitors and TV's, but they are actually the same old LCD's, just with different back lighting and more pixels.
    It's only the new OLED technology that is actually a new and different thing and you can't get those in TV's or monitors yet in stores. I think some Korean or Japanese company showed like a 40cm prototype monitor like 3 years ago or something but they haven't even made it into the market yet except for these tiny screens on watches or small scale electronics like some of the things you show.
    It could be another 10 years until OLED's are easily available for monitors in a store.

    • @zachdemand4508
      @zachdemand4508 6 років тому

      Lord of the belts: The return of the KING
      The first part of your comment is right, although I think he was talking about and led segment display. The second part is not true at all. We have oled displays everywhere ranging from less than an inch to 88 inch.

  • @babelfishdude
    @babelfishdude 7 років тому

    I get the feeling some USB battery bank will detect dead short and shut off, technically the foot warmer is probably detected as a short.

  • @First2ner
    @First2ner 8 років тому

    have you seen any that are 100v versions?

  • @antonis476
    @antonis476 7 років тому

    how long does it take to receive your items from China? in Greece it's a nightmare currently

  •  8 років тому

    Does the power meter measure negative current?

  • @awesomefacepalm
    @awesomefacepalm 8 років тому

    Try to replace the wire to the warmers and the elements should probably get hotter I guess

  • @AnsyCrofts
    @AnsyCrofts 8 років тому

    Meh! Those OLED power meters are just what I'm looking for, to monitor a "MuPPeT" I'm working on....*
    Problem is, they seem to be 'low-side' current sense, so I'll have to stand the MuPPeT on its head...+VE common.
    Dogbreath! Hard work afoot....
    * Processor: Atmel Xmega32E5 (cheap-as-chips §) and Texas Instruments INA3221 (Triple high-side voltage and current measuring chip - I2C interface) - (cheap-as-a-damn-good-steak - both surface-mount only, but we used to use valveholders and tagstrips until this new-fangled stripboard and transitories and capacitators came along. ...OK, I won't touch through-hole nowadays, when it's so cheap to get solder paste, SMD-DIL boards, a hot-air soldering thingy, all from Banggood/Alice/Ebay/wherever, prototypes for €10 - plenty of change from €100
    Julian - I feel a postbag/instructible coming on...)
    § From the little book of "Wrong Shui".
    "A chipped plate is Bad Shui. But a plate of chips is very good!"
    OK, more...
    "Placing a Rock near a Hard Place is bad shui."
    "Ladies with no gentlemen friends. Simply replace your living-room light bulb with a red one"
    RATS! The meter is almost exactly what I wanted....

  •  8 років тому

    Isn't using that freeze spray kinda dangerous? Can condensed water short the circuit?

    • @ElmerFuddGun
      @ElmerFuddGun 8 років тому

      +Erik Bročko - Dangerous? It isn't water and is made for testing circuit components. It doesn't conduct electricity. (Pure water doesn't conduct either.)

    •  8 років тому

      ElmerFuddGun But there’s water in the air. Can’t that cause corrosion (especially on high-power DC circuitry) or short?

    • @ElmerFuddGun
      @ElmerFuddGun 8 років тому +1

      +Erik Bročko - outdoors with other contaminants sure but hardly much of a concern. Think of all your outdoor lighting, car battery, etc. - you're not really concerned here and that can be at higher voltages and currents. Now putting your wires into the salty sea water is another story!

    •  8 років тому

      Thank you! :) First grade of electrical engineering school... :D

    • @ElmerFuddGun
      @ElmerFuddGun 8 років тому

      +Erik Bročko - no prob. Do get some of that super cold spray though. It's great for briefly testing electronics at sub zero temperatures or even just cooling a transistor that has gotten too hot.

  • @kwintberg
    @kwintberg 8 років тому

    Any idea if the power meter remembers its laste consumed Wh? After it has been disconected from its source.

    • @KiSwiSje
      @KiSwiSje 8 років тому

      +Kwint Berg yes - when powering up the previous values are visible, but flashing
      will have to investigate further, just got mine
      as julian finaly figured out - it has 2 sets of data for Ah and Wh

  • @rich1051414
    @rich1051414 6 років тому

    Mmm, the nice smell of resistor burning in the morning.

  • @benedictnothing
    @benedictnothing 8 років тому

    Bought loads of stuff from "Alice" over the years. Isn't it just a Banggood drop-ship account?

  • @StephenWebbone
    @StephenWebbone 8 років тому

    Notice that the eBay listing on the meter, the screen is crooked, not as bad as the one you have but wonky still.

    • @ElmerFuddGun
      @ElmerFuddGun 8 років тому +1

      +Stephen Webb - it's humorous how little attention sellers put on the pictures they use on eBay and Amazon. Crooked screens, bad soldering, nicks and scratches, etc. You would think they would want to show the best example in the ads. Also, love the ads with bad spelling! Makes you laugh.

  • @bvanlaer
    @bvanlaer 8 років тому

    "more of the cheap stuff" LOL that's why we love you..

  • @TheChipmunk2008
    @TheChipmunk2008 8 років тому

    Wonder if those heater things would run off 12v... my car doesn't have heated mirrors... and running those behind the mirror glass... hmmmm

    • @MrOpenGL
      @MrOpenGL 8 років тому

      +TheChipmunk2008 Run them in series. 14/2=7V which is close enough to 5V.

  • @GadgetBoy
    @GadgetBoy 6 років тому

    I spend SO much money on Alice's store because of you :-p

  • @tm80notgoodwithnames58
    @tm80notgoodwithnames58 8 років тому

    put that meter to the solar system and monitor all types of stuff
    those heaters would be good for aluminium mouse pads that are cold to use

  • @SensoryAlterations
    @SensoryAlterations 8 років тому +1

    The wire might be getting warm because the heat from the elements are transferring through it? Like how a heat sink spreads heat out over it's 'entire' area

  • @_who_cares_1123
    @_who_cares_1123 8 років тому

    Yay Postback :D :D

  • @jpalm32
    @jpalm32 8 років тому

    All the displays must be crooked. The site shows it crooked also

  • @1981dasimpson
    @1981dasimpson 8 років тому

    feet warmers or i must get need badly for the work place haha

  • @datinniezaidi7754
    @datinniezaidi7754 8 років тому

    hello from the othe- im mean from the future!

  • @AnsyCrofts
    @AnsyCrofts 8 років тому

    Warmers???? Them ain't gonna do dam' all where I live, Julian.
    -28C for a couple of days last week. Didn't go out much. Simples. Can't see them things making a ha'porth of difference.
    (Oddly, kids of 7 are expected to attend school in such climes, but big, burly construction workers can wimp out when it's below 20...)

  • @Madmax23419
    @Madmax23419 8 років тому

    Nice burnt china lead paint smell, i love it, give you a high for free! :D

  • @dalenassar9152
    @dalenassar9152 6 років тому

    Un-coil the cables!

  • @datinniezaidi7754
    @datinniezaidi7754 8 років тому

    Hi Julian.Would you reply to me?

  • @RazonOnline
    @RazonOnline 8 років тому

    "Doesn't detect a heavy load."

  • @SimplyDudeFace
    @SimplyDudeFace 8 років тому

    Yeah! More cheap stuff for sure! :-)

  • @dougdevine27
    @dougdevine27 7 років тому

    Am I the only one bothered by the OLED screen being tilted...even in the seller's promotional picture?!!!

  • @jlucasound
    @jlucasound 5 років тому

    You should be at 500K+. I don't get it.

  • @superdau
    @superdau 8 років тому

    Those meters are nice, but why do chinese products alwas have to use the ugliest font they can find for the job?

  • @datinniezaidi7754
    @datinniezaidi7754 8 років тому

    early asf✔

  • @joblessalex
    @joblessalex 8 років тому

    rant. Thanking your PAYtreon people is great and all, but don't forget why you actually have them. If you didn't have your subscribers and viewers, you'd be nothing. Just another guy on UA-cam trying and failing. People who don't pay with money are just as important or more so than the people who give you money. Don't forget your roots.

  • @jovanjanevski3747
    @jovanjanevski3747 8 років тому

    Useless devices.

  • @yamatoneko1
    @yamatoneko1 8 років тому

    The OLED display will show signs of burn in very fast. Useless.