NP-41 Emulator (may be)

[Chris Chung]

(12-17-2015 04:05 PM)quantalume Wrote:  I had in mind using a Raspberry Pi Zero as the brains, which would permit all sorts of connectivity options.

Any updates from our Chinese friends? What is the status of LCD production and cost?

Using a PI would be very different, as it would run on top a OS. It may not the the instant-on instant-off attribute of a direct MCU build. But definitely will work for a desktop calculator. Although not very common, there are 6 digits x 14 segments LED module that you can use.

We have not initiate batch LCD production. I have about 10 samples. The combined cost for a batch of 300 units would likely be a bit less than $1000. Which is very attractive if we have the scale. Consider the graphic option (plan B), the display alone would cost $30 (if acquired in US, from China it's $12, but not reliable supply).

(12-17-2015 09:18 PM)Massimo Gnerucci Wrote:  Ditto! Fantastic contrast.

Thank you Chris, however this turns out it will be definitely interesting (and I want more than one!)

I am also very impressed w/ the contrast outcome! I was discourage w/ the last build.

I was thinking to create plan B for a kit, it will be easier to assemble and more reliable (fewer traces, fewer problems). There are many things that can go wrong w/ the custom LCD version (which did). I was thinking to just leave it there after I finish my build, and if there are a few here would like the LCD they can get them from me.

But l will let the project lead itself, will work on plan B, get a keyboard for plan A and see how it goes. Plan A will be slower though.