#1767

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  • Опубликовано: 12 дек 2024

Комментарии • 50

  • @romancharak3675
    @romancharak3675 10 месяцев назад +6

    The voltage accuracy is not so important. The main use is for checking the strips of LEDs inside Flats Screen TVs. The LEDs on those strips fail open or short. This tester lets you see where the fault is by illuminating the Strips, if they light up at all.

  • @mikeselectricstuff
    @mikeselectricstuff 10 месяцев назад +2

    That's so much less sketchy than one I got a while ago, which was a non-isolated capacitive dropper mains supply, with a single pole mains switch and non-polarised mains plug.

  • @Godunjoify
    @Godunjoify 10 месяцев назад +4

    There must be a timer in there to switch the current from 20 to 50.
    Very cool to test zene Diodes for a short period of time.

  • @Edisson.
    @Edisson. 10 месяцев назад +3

    Hi Imsai, it's a handy helper, I have a similar one, it also has two V/A displays, but instead of the main switch you have on your tester, I have a small programming button. Using the button and short-circuiting the test cables, you can select a certain mode of operation, or leave the tester in automatic operation. My model is produced in an even better (more expensive) version with the possibility of testing backlight sources in the TV.
    You can try short-circuiting the test leads for a while to see if you have the option of a fixed setting made differently - for example, short-circuiting during operation, or short-circuiting and switching on, a dot on the display indicates the change of program.
    Nice day 🙂 Tom

  • @Dennis-uc2gm
    @Dennis-uc2gm 10 месяцев назад +2

    Bought a common one that was selling a couple years ago to troubleshoot a backlight issue on a large flat screen, but I found they make a great zener diode tester. 👍

    • @IMSAIGuy
      @IMSAIGuy  10 месяцев назад +1

      Good tip!

  • @TheElectronicDilettante
    @TheElectronicDilettante 10 месяцев назад +2

    Get proper probes. If those are the ones I think they are, the conducting core is comprised of about 6 strands of copper thread. Will make great filaments.

  • @robinbrowne5419
    @robinbrowne5419 10 месяцев назад +1

    (At 11:25) That's 50mA. Holy cow. I wouldn't stare directly at the lamp at 1A. I know this from experience because fiddling with LEDs is one of my favourite hobbies. I have made the mistake of turning on a super bright LED while it was pointed at my eyeball. Several times. Lol.

    • @Broken_Yugo
      @Broken_Yugo 10 месяцев назад +2

      i wear sunglasses when messing with power LEDs for this reason.

    • @robinbrowne5419
      @robinbrowne5419 10 месяцев назад

      @@Broken_Yugo Very wise 👍 It's amazing how bright they can be.

  • @MrMersh-ts7jl
    @MrMersh-ts7jl 10 месяцев назад +4

    Ive seen this only used by xtaytonyb during his transistor explanation video, part 2 i believe. Used it for demonstrating reverse breakdown.

  • @Digitek_Electronica
    @Digitek_Electronica 7 месяцев назад

    Thanks for the approach to the circuit.
    I needed to know the value of resistors R22 and R23, 1K and 10R, respectively.

  • @TheDigitalAura
    @TheDigitalAura 10 месяцев назад +2

    I have an earlier iteration of this which comes in a slightly smaller form factor. It's been useful, but I'm always very wary of using it. Mine is very much sealed closed.

  • @paulstaf
    @paulstaf 10 месяцев назад +1

    NOT JETSON, J-E-S-T-O-N. 🤣

  • @paulstaf
    @paulstaf 10 месяцев назад

    I have a similar tester I use to test TV backlights. It is very handy for that purpose.

  • @craigs5212
    @craigs5212 9 месяцев назад

    Interesting tester, it was really hard to find the data sheet on that DU8613

  • @frankowalker4662
    @frankowalker4662 10 месяцев назад +2

    Handy little device. (if a bit dangerous)

  • @bob_mosavo
    @bob_mosavo 10 месяцев назад

    Thanks 👍

  • @rorymacleod8488
    @rorymacleod8488 10 месяцев назад

    Seems like a great little accessory >>. how bout chip pf the day on DU8613 ?

  • @mixguru9669
    @mixguru9669 10 месяцев назад +6

    It is JESTON not JETSON 😂

    • @jimomertz
      @jimomertz 10 месяцев назад +3

      If it had said Spacely Sprockets, you would know to run away quickly. 😮

    • @IMSAIGuy
      @IMSAIGuy  10 месяцев назад +4

      Spacely Space Sprockets, Inc.

    • @dilbertnewton6864
      @dilbertnewton6864 10 месяцев назад +3

      This is why I support DAM, (Moms Against Dyslexia)

    • @IMSAIGuy
      @IMSAIGuy  10 месяцев назад +4

      @@dilbertnewton6864 that's right, in my reality, it is JETSON!

    • @robinbrowne5419
      @robinbrowne5419 10 месяцев назад

      It's weird that in The Jetsons (which is set in the future) the TVs and Video Phones (of which there are many) all have the rounded corners and bulbous glass screens of CRTs and also have these weird circular antennas. Lol.
      Welcome to the future :-)
      📺 📺 📺 📺 📺

  • @HAUNTED-HAM
    @HAUNTED-HAM 10 месяцев назад +1

    Wonder if you had a diode you didn’t know you could use to establish volt rating?

    • @Broken_Yugo
      @Broken_Yugo 10 месяцев назад +2

      Theres a different cheap box from china just for that, claims 2700V, look for "transistor breakdown tester".

  • @Broken_Yugo
    @Broken_Yugo 10 месяцев назад

    I think these are just for finding dead LEDs in the panel without disassembly, or confirming good LEDs and bad PSU.

  • @rockyW46
    @rockyW46 Месяц назад

    Hello and congratulations for the useful video, but does this tool have protection against short circuit? If you join the two probes by mistake does it have protection? if you try to test the led and reverse the polarity is there a risk of burning it with this tester? thanks!

    • @IMSAIGuy
      @IMSAIGuy  Месяц назад +1

      Yes and yes

    • @rockyW46
      @rockyW46 Месяц назад

      @@IMSAIGuy Thank you so much 🤝🏻

  • @0MikeG
    @0MikeG 10 месяцев назад

    Maybe the 300 V is for testing cold cathode lamps.

    • @SeanBZA
      @SeanBZA 10 месяцев назад +4

      No, series LEDE strings in TV sets. 50mA is standard current, and to get the brightness you put lots of LED's in series. Series as the aluminimun board will easaily withstand 300V, and you can use very thin cables to connect, as they also will handle 300V, and with 50mA you only need to use a thin cable and save copper. Running them off say 12V your current would be a few amps for the backlight, needing thick copper cables, and much thicker PCB traces, to carry it. Both cost money to put in.

    • @0MikeG
      @0MikeG 10 месяцев назад

      Makes sense. Have took a few older laptops apart where cold cathode tube are used. I guess LED makes more sense these days.

    • @SeanBZA
      @SeanBZA 10 месяцев назад +1

      @@0MikeG Cold cathode tubes need around 3kV to start them conducting, then draw a constant current of around 10-50mA, with a voltage drop across them of roughly 90V, though that voltage rises with age as the cathodes wear. They need to be run with a constant current, as the voltage drop decreases with increasing current, till the electrodes melt through the glass with enough current. The ends sputter material onto the glass with use, which is why they go black there with age, and eventually refuse to start and keep running with the 200V the power supply can put out. The CCFL driver senses the voltage across the tube, and will shut off when it exceeds the limit set by the CCFL manufacturer, so you will have the backlight light up for 10 seconds on power on, then turn off, as the driver attempts to run the tube, and after 10 seconds the timer that disables voltage sensing times out.

  • @islandseeker1260
    @islandseeker1260 Месяц назад

    I thought I saw JESTON, but I might be a bit dyslexic.

  • @chrisgroenewegen3756
    @chrisgroenewegen3756 10 месяцев назад

    Now I really have to smile…..

  • @simontay4851
    @simontay4851 10 месяцев назад

    So how much did it cost?

  • @robinbrowne5419
    @robinbrowne5419 10 месяцев назад

    It's weird that a modern TV still has 300V inside it. You would think that they would use white LEDs for the backlight. But no. The wizards, in their infinite wisdom, decided to use high voltage fluorescent tubes instead. See. It really is wizardry 🧙‍♂️ and us mere mortals 🤷‍♂️ are left scratching our heads. Lol.

    • @IMSAIGuy
      @IMSAIGuy  10 месяцев назад +2

      no, this is not for fluorescent tubes, the LED backlights are many LEDs in series that can add up to fairly high voltages. while this tester can go as high as 300V the LED backlights are probably much lower

    • @robinbrowne5419
      @robinbrowne5419 10 месяцев назад

      Oh ok. But why they would have to put many LEDs in series and not in parallel is equally puzzling. I guess they can get more even brightness from the LEDs because they all have exactly the same current, and they can save 0.1 cents on the resistor for each LED which would be needed if they are in parallel. But this theory is probably wrong too. Lol.

    • @IMSAIGuy
      @IMSAIGuy  10 месяцев назад

      what voltage comes into the TV? it is more efficient to stay high.

    • @robinbrowne5419
      @robinbrowne5419 10 месяцев назад

      @@IMSAIGuy True 👍

    • @absurdengineering
      @absurdengineering 10 месяцев назад

      @@robinbrowne5419It’s not about saving money on resistors. It’s about not wasting energy. And using fewer resources - lighter copper if you use 300V and connect the LEDs in series. TV switching supplies have a winding for the LEDs. It can be fairly thin wire. It really is about the lowest parts cost solution and that’s not a bad thing. If you can use less copper by clever design, who cares about it being 300V. It’s inside the box. Low voltage high power takes lots of copper or it’ll waste energy. It takes energy to refine copper. The less you use, the better overall.

  • @JoseHernandez-md8tv
    @JoseHernandez-md8tv 10 месяцев назад

    Please fix the solder joint from the power Switch cable to the pcb 😮

  • @vckrijt
    @vckrijt 10 месяцев назад

    ha ha ..humor is importent