Is there any low-emf digital drawing device?

Discussion in 'What Tablet PC Should I Buy?' started by Hell-Cat, Jun 17, 2020.

  1. Hell-Cat

    Hell-Cat Pen Pal - Newbie

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    I'm currently using Wacom Cintiq 22. I want something that is low in electric field, magnetic field, and electromagnetic radiation. Wacom Cintiq 22 is low in electric field and magnetic field. But, it still emits electromagnetic radiation.

    Wacom EMR technology emits electromagnetic radiation at around 250khz and 500khz. Wacom EMR's radiation spans beyond 560Khz. I measured electromagnetic radiation from Wacom EMR(electromagnetic rasonance) technology with a portable AM radio tuned at 530KHz.

    I didn't like what I heard from the AM radio. I heard buzzing noises. The noises became noisier when I brought a pen nearby.

    I suspect N-trig and Wacom AES would not emit electromagnetic radiation.

    By the way, any drawing device that I use needs a proper linux driver because I use linux.
     
    Last edited: Jun 17, 2020
  2. thatcomicsguy

    thatcomicsguy Pen Pro - Senior Member Senior Member

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    I'm reasonably sure that the Microsoft approach to screen drawing emits no EMR to drive their pen tech. I've not looked closely at it from that perspective, but they leverage capacitive touch technology and their pens use batteries to create a pin-point charge state that the touch sensors can read. That means no big antenna array under the screen which emits EMR for the pen to read.

    So that would mean none of the fields you indicated wanting to avoid would come from the (beautiful) Surface Studio, or any of their Surface Books. -And presumably not from any machines which have licensed the MS tech. But you'd have to double-check to be sure that I'm right.

    And you should probably bear in mind.., that doesn't get rid of the regular EMR pollution you get from laptops and screens. I bet the Surface Studio emits quite a lot of 'noise' regardless of the pen tech.
     
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  3. darkmagistric

    darkmagistric Scribbler - Standard Member Senior Member

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    Yeah, I did a science project on EMFs back in the 6th grade. All electronics, really anything with an electric signal emits EMFs. Although EMR pen tech Definitely has a magnetic element to it that Ntrig/AES doesn’t.....for the purpose of EMFs, since the computer/display would be producing them, I’m not sure the pen tech difference would even make a difference in this regard. If you have a EMF detector, you could try comparing the emf reading from a Cintiq to that of a Surface Pro/studio/book.
     
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  4. Hell-Cat

    Hell-Cat Pen Pal - Newbie

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    Monitors without any wireless technology don't produce nearly as much electromagnetic radiation as Wacom EMR technology.
    With dirty electricity filters, you can further reduce electromagnetic radiation emitted by electronics.

    Do you recommend any specific product?
    Are microsoft surface products compatible with linux?
    Ideally, I want a pen display because it is independent of any computer.
     
    Last edited: Jun 21, 2020
  5. thatcomicsguy

    thatcomicsguy Pen Pro - Senior Member Senior Member

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    Are you sure about this or are you working from assumptions? -Because while it makes sense at first blush, none of my tests have come back with anything even close to a significant difference when Wacom is active versus not active.

    While they don't list any stylus enabled machines, this article notes a handful of modern laptops which seem to have the least impact on electrosensitive people:

    https://www.emfanalysis.com/low-emf-computing/

    It might give you a starting point.

    You might also consider taking your meter to a computer store and pulling some measurements from the display models. I bet that could be informative.
     
  6. Hell-Cat

    Hell-Cat Pen Pal - Newbie

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    I measured regular monitors with AM radio.
     
  7. thatcomicsguy

    thatcomicsguy Pen Pro - Senior Member Senior Member

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  8. Hell-Cat

    Hell-Cat Pen Pal - Newbie

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    Many electronics emit electromagnetic radiation below 10MHz. Consumer-grade EMF meters cannot yet measure electromagnetic radiation below 20Mhz. An AM radio detects electromagnetic radiation between 530khz and 1600khz.

    Wacom EMR Technology relies on 250khz and 500khz. Somehow, electromagnetic radiation from wacom EMR spans beyond 1600khz according to my AM radio.

    Considering that there is no pen display that utilizes N-trig or Wacom AES, I'm going to wear a sleeve and a glove made out of RF-blocking fabric.

    For now, all devices that use N-trig and Wacom AES are computers embedded in displays. Computers emit electromagnetic radiation below 20MHz although I don't know how strong electromagnetic radiation from computer would be in those devices. The problem with those devices is that they tend to be high in electric field while charging.
     
    Last edited: Jun 22, 2020
  9. thatcomicsguy

    thatcomicsguy Pen Pro - Senior Member Senior Member

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    I did some poking around in the menu system and found I was able to take this reading: (Evidently reading in the 200khz to 327khz range.)

    I don't know what I'm looking at on this reading, however. It was taken while placed directly on the screen of my Dell Canvas.

    Maybe you can make sense of it:

    EMR-reading.jpg
     
  10. thatcomicsguy

    thatcomicsguy Pen Pro - Senior Member Senior Member

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    Here's a closer look at the screen:

    EMR-reading-up-close.jpg

    I could take a reading across a spectrum, and then scroll through the results with the up/down buttons. I stopped on the peak of 322kHz, (at the arrow pointing down) where it read, if I'm not mistaken, 13 nano Watts per square meter.
     
    Last edited: Jun 23, 2020
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