NP-41 Emulator (may be)

[Chris Chung]

(10-07-2015 01:29 PM)jebem Wrote:  

(10-06-2015 12:32 AM)Chris Chung Wrote:  The LCD were ordered to have VLcd at 3.0V as I intend to run the calculator off a 3V coin cell, which I was doing on the photo, except I add a potentiometer to drop it further to 2.9V. When I get the charge pump to work, I can make it software configurable.

It looks good enough to me.
How about the annunciators? Are it readable?

As a last resort, a simple voltage 2-resistor network could be used instead of a potentiometer, as long as the adjustment is not critical (variances between different machine components).

I have to get the charge pump to work as it will guarantee the when the battery ages, it won't affect the contrast. So far no know, it could be my PCB, will have to spend time on it.

The annunciators / icons are good, I just have not map them w/ the simulator code. I am working on the keys now, almost done and there is a lone pin that I need to re-flow.

I definitely need to invest on something to solder the LQFP. Leaning towards a simple upside down iron re-flow trick. Will see.