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History/Purpose of SD for VNA

billsf9c
 

": the SD card receiver (slot hardware) may be installed on the motherboard inside the plastic case, depending on the date of manufacture of your board (some early boards didn't have the part installed) - but there is no external slot on any of them, unless you carve one out yourself." Stan Dye
I cannot figure why an SD slot would be accommodated ALMOST from original design, be so useful, and not ever implemented.

Is this in ye olde archives?

I cannot see it as a Test Q&A, nor a great idea not implemented for lack of a coin to flip.

BillSF9c
 

On 2/3/23 6:55 AM, billsf9c via groups.io wrote:
": the SD card receiver (slot hardware) may be installed on the motherboard inside the plastic case, depending on the date of manufacture of your board (some early boards didn't have the part installed) - but there is no external slot on any of them, unless you carve one out yourself." Stan Dye
I cannot figure why an SD slot would be accommodated ALMOST from original design, be so useful, and not ever implemented.
Is this in ye olde archives?
I cannot see it as a Test Q&A, nor a great idea not implemented for lack of a coin to flip.
BillSF9c
Cost sensitive device - don't put parts in that aren't needed.
(esp if you're trying to hit a specific target cost, like $50)

Software to drive it not yet written
(don't want to listen to gripes about "the pins are there, why doesn't it do this function)

Couldn't fit full size in original layout
(Squeezing it in the 2.3" screen with the shielding cans, etc. is hard)

Original NanoVNA had no case
(self explanatory)

The NanoVNA has gone through quite a few revisions over the last few years.
 

and now we have them modded with sd card , xtal for a clock, battery indication, 4 and even 7 inch ... some with sma and some with n connectors

with open or closed fw ...? (clones, brothers, sisters and cousins) ...from half a dozen vendors

and some are heavy modded :-) (like the 7 inch testbed from dislord.. grin)

dg9bfc sigi


Am 03.02.2023 um 17:12 schrieb Jim Lux:

On 2/3/23 6:55 AM, billsf9c via groups.io wrote:
": the SD card receiver (slot hardware) may be installed on the motherboard inside the plastic case, depending on the date of manufacture of your board (some early boards didn't have the part installed) - but there is no external slot on any of them, unless you carve one out yourself." Stan Dye
I cannot figure why an SD slot would be accommodated ALMOST from original design, be so useful, and not ever implemented.

Is this in ye olde archives?

I cannot see it as a Test Q&A, nor a great idea not implemented for lack of a coin to flip.

BillSF9c
Cost sensitive device - don't put parts in that aren't needed.
? (esp if you're trying to hit a specific target cost, like $50)

Software to drive it not yet written
?? (don't want to listen to gripes about "the pins are there, why doesn't it do this function)

Couldn't fit full size in original layout
?? (Squeezing it in the 2.3" screen with the shielding cans, etc. is hard)

Original NanoVNA had no case
?? (self explanatory)

The NanoVNA has gone through quite a few revisions over the last few years.

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