[minima] Re: Re Minima-Schematic-Revisions
- From: Arv Evans <arvid.evans@xxxxxxxxx>
- To: "minima@xxxxxxxxxxxxx" <minima@xxxxxxxxxxxxx>
- Date: Wed, 29 Oct 2014 11:31:06 -0600
Hello
Sometimes we forget that the Minima can be built for single-band
operation, and that it can be built to use a conventional (non-digital)
VFO. It might be confusing to "split the design path" but it is not
difficult to make one-off versions which deviate significantly from the
original design and from present day design evolution. Adoption of
a suitable naming convention might help with better understanding
of which version we are talking about, including original version,
deviant versions, and today's advanced evolution of Farhan's original
design.
Arv K7HKL
_._
On Wed, Oct 29, 2014 at 8:39 AM, Eldon Brown <eldonb46@xxxxxxxxx> wrote:
>
> On Mon, Oct 27, 2014 at 12:21 AM, Hugh Kilfoyle <kilfoyle@xxxxxxxxxx>
> wrote:
>
>> I wish to support Mac's view that a version incorporating the changes
>> outlined in the "Essential Modifications Errata & Notes" web page, plus the
>> J-KISS version 3 mixer, be finalised now and identified as version 1.1.
>>
>> The name Minima implies a no frills design. I realise that some of the
>> proposed modifications will enhance the versatility, performance and ease
>> of use but will on the other hand add complexity that some builders may not
>> want. Perhaps a more advanced design could be called the Maxima.
>>
>> I have looked forward to instalments of Mac's excellent construction
>> guide with the same eager anticipation normally reserved for the GQRP Club
>> magazine 'Sprat'. It would be a great pity if Mac was put off continuing
>> his guide because the basic design remained in a continual state of flux.
>>
>>
>> 73
>> Hugh ZL1UEM
>>
>
>
> I also agree, I think, retaining a historical perspective of the Minimal
> is very important, to support current Build Projects, in progress
> Publication and Documentation efforts
>
> I suggest the following Revisions:
>
> Minima Schematic Rev 1.0 - "The Classic Minima" as drawn and published by
> Farhan, along with the original Arduino Sketch.
>
> Minima Schematic Rev 1.1 - Corrections to the original Schematic, using
> the original tools to re-draw the schematic.
>
> Minima Schematic Rev 1.1a - Suggested Modifications to the KISS Mixer -
> again using original tools.
>
> Minima Schematic Rev 1.1b - etc, Maybe another KISS Mixer revision, or
> commercial Mixer.
>
> Questions:
>
> Who will be drawing and publish these Revisions using original tools, and
> what is the expected availability date?
>
> Who will be drawing the NEXT generation of schematics using Open CAD/CAM
> Tools, and what is the expected availability date?
>
>
>
> My suggestions, For the Future:
>
> Minima Schematic Rev 2.0 - The schematic should be drawn using Open
> CAD/CAM tools (maybe KiCAD), but retaining the original layout as much as
> possible. This schematic should be usable by hobbyist or manufacture to
> produce; "point-to-point", "Manhattan Style", "Ugly Style" of other wired
> projects, or it can be used directly to produce PCB's if desired. This
> revisions should include the following simple and mostly "Classic Minima"
> compatible modifications:
>
> o Single wire Rf386 Bandpass Filter Selection move to pin PC0
>
> o Additional six buttons parallel to the original FN button via a 47K/4K7
> resistive ladder; Left/Right, Up/Down, ALT, and the Encoder Pushbutton.
>
> o Rotary Encoder pins "A" and "B" connected to PD6 and PD7, pin "C" (the
> included encoder push button) should be as above.
>
>
> All future, Minima Schematic 2.0xx Revisions should be as compatible as
> possible with the original Classic.
>
> The 3.0 Revisions designation should be reserved for a future orthogonal
> Engineering directions.
>
>
>
> An FYI
>
> We have a large group of QRP and Minima enthusiast in the US Pacific
> Northwest (PNW) and will be expanding on the Minima and Schematic in
> directions of local interests. We will using something like "Rev 2.0,PNW"
> for our additions or modifications. The initial additions that come to mind
> are; a second Si570 to replace the BFO, and a software DDS to replace the
> SideTone Oscillator, and other modifications to support other areas of
> interest.
>
> There are many divers Minima interests in our local group. My personal
> interest, is micro-miniaturization of the circuit using that smallest parts
> available on very dense PCB's.
>
> Note: Our local PNW interests will not detract from our support of the
> general Minima Projects.
>
>
>
>
> Regards,
> Eldon Brown
>
> 73 - Eldon - WA0UWH - http://WA0UWH.blogspot.com/
>
>
>
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