[Elecraft] Sorta OT - assistive technology assistance needed

[Gary Smith]

Not the answer you are asking for but 
still maybe a valuable idea for your 
friend.

My mother was totally deaf and my father 
wanted to teach her code. What he did was 
disassemble & repurpose a speaker and made 
an arrangement that attached to her 
forearm, this connected to the audio 
output. The coil moved with the CW in the 
audio, that pressed against her skin and 
she was able to tactile sense the CW 
really well.

Maybe this will help you or someone else.

73,

Gary
KA1J


> Good Day.
> 
> Background:
> 
> I am assisting a blind ham who also suffers some hearing loss.  I
> suggested using headphones to attenuate ambient environmental noise as
> he operates.  The rub is, he needs to hear both his receiver AND his
> computer (which provides audible feedback when logging contacts and
> performing other duties.)
> 
> Question:
> 
> Can anyone suggest a simple passive (or active) mixer circuit schema I
> can build for him to safely mix audio signals from his transceiver
> headphone jack with audio signals from his computer sound card
> headphone jack?
> 
> Discussion:
> 
> While there are multiple commercially produced simple and complex
> mixing products in the marketplace, I would prefer to build an
> inexpensive, small footprint solution we can easily incorporate in his
> station to minimize clutter and the number of cables, jacks, and
> controls -- he contends with plenty of that already.   I suppose one
> solution might be a simple Y-adapter cable, but that seems too easy
> and I wonder whether we should isolate the signals and/or grounds in
> some way?  (e.g., I do not wish to cause any "Pin-1" grounding
> issues, and etc.)
> 
> Any traction?   Can anyone point me to an appropriate circuit
> schematic or other resource?  I don 't mind doing homework, and while
> I enjoy building stuff and I am familiar with the basic concepts
> involved,  I could use a leg up on this project, especially to keep
> it simple and easy to build and implement. Please reply off list if
> this question is too far off topic, although I suspect there are many
> hams who might be interested in the result, besides similarly situated
> disabled operators.
> 
> Thank you -  James - K8JHR -
> ---------------------------------------
> 
> 
> 
> 
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