EMS and multiplexer specification

[kumadasu]

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.

[H2L]

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 7 years, 6 months ago by H2L.

[kumadasu]

@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?

[H2L]

@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

[kumadasu]

@H2L

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

I will hack unlimited hand more myself.

Thank you.

[Author]

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