EMS and multiplexer specification

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This topic contains 4 replies, has 2 voices, and was last updated by Profile photo of kumadasu kumadasu 1 year, 10 months ago.

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  • #337
    Profile photo of kumadasu
    kumadasu
    Participant

    Could you provide any electrical specification?
    Extremely I want to know about EMS and multiplexer.

    I want to stimulate multi channel simultaneously.
    I understand that current firmware doesn’t support this feature.
    And it seems impossible to stimulate multi channel simultaneously because of multiplexer.

    I want to try turn on channel A a little time, and after that turn on channel B,
    and A, B, A, B…
    Probably I can feel it as weak A and B simultaneously.

    It is similar to drive multi-digit 7 segment display with limited ports.
    http://www.hobbytronics.co.uk/arduino-4digit-7segment

    It works logically but I don’t know electrical limitation.
    If the specification doesn’t available, I want any information related to it.

    #346
    Profile photo of H2L
    H2L
    Keymaster

    Thanks @kumadasu for your inquiry.

    I understand that you wish to deliver stimulus through multiple output channels.
    We are using 72V analog 8-to-1 multiplexers.

    Let us know how you plan on doing the modification and the type of information
    that you might need so we can better facilitate your project.

    UnlimitedHand team.

    • This reply was modified 2 years, 1 month ago by Profile photo of H2L H2L.
    #367
    Profile photo of kumadasu
    kumadasu
    Participant

    @H2L

    I’m sorry for very long absence.

    I understand that you wish to deliver stimulus through multiple output channels.

    Exactly. I especially worry about switching time of on/off and channels.
    Are there minimum time for switching “on and off” and “channel A to B”.
    May switching too fast damage UH hardware?

    #368
    Profile photo of H2L
    H2L
    Keymaster

    @kumadasu:

    The current version of UnlimitedHand is not capable of outputting via multiple channels due to safety limit of the multiplexer.

    If you are a researcher and would like to deliver stimulus via 2 channels at the same time, we do have another device “PossessedHand” which is capable of doing so.

    UnlimitedHand team

    #369
    Profile photo of kumadasu
    kumadasu
    Participant

    @H2L

    I didn’t know PossessedHand. But I want hack without new purchase.

    I will hack unlimited hand more myself.

    Thank you.

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