NP-41 Emulator (may be)
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04-14-2016, 06:48 PM
Post: #223
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RE: NP-41 Emulator (may be)
(04-14-2016 04:43 PM)Chris Chung Wrote: Congrats!! The keypad prints are off on 2 of the rows. Also the fact that I miss 2 traces on the back. I can re-do just the keyboard PCB and since it's within 100mm x 100mm, it will cost <$20 + $10 shipping to get 10 PCBs manufactured. I guess this is the advantage of using two PCBs. Thanks for the hint about the contrast. It appears there are several,other parameters that can be adjusted, too. At first I had trouble leaving that mode, but then somehow managed. Contrast is better now, but I needed the second lowest setting (on the lowest the display goes blank) So far I noticed two strange things: 1) using a cat command, the last digit sometimes shows eratic segments while the the calculator displays the catalog. 2) when the calculator has been turned off for a while and then is turned back on, a lot of segments come on that shouldn't. They then fade within a couple of seconds. Is that maybe to do with the charge pump? I'll continue observing... Cheers, Harald |
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