NP-41 Emulator (may be)

[Chris Chung]

(09-29-2015 09:55 PM)rprosperi Wrote:  .....

Chris - If you are keeping a list yet, please add me as well; while I'd certainly like more than 1 (eventually), 1 from an early batch is fine, I don't want to deny others also wanting one.

Jim did a great job explaining and showing off the NP25! In addition to many new interested buyers, to those that were seeing it for the first time, it was a shock to see such a capable and functional device in such a simple-looking pkg. One old-timer there simply did not believe it was what was described until I literally showed it to him and put it in his hands. After the shock wore off, he did not want to put it down. It continues to make impressions, just like the new NP41 will I'm sure.

Thanks to both Chris and Jim for this great device.

NP41 is far from complete. I am glad that NP25 got all these attention

I did a test rig set-up to test the LCD glass from Waon. Here is a video.

The contrast is not as good as shown in Waon's photo. As I am properly multiplexing them at 1/6 duty cycles instead of static DC. I am using resistor dividers to get the voltage bias needed (the glass is of 1/3 bias, so I need to generate 1, 2 and 3V). There is shadowing as you can see on the video. I hope with a proper LCD driver I can fine tune the bias voltage and get better results. This set-up is used to make sure every segment is good and individually addressable (via multiplexing) on the sample pieces.