NP-41 Emulator (may be)

[Harald]

(04-15-2016 12:06 PM)Chris Chung Wrote:  This definitely looks like the charge pump is taking the time to charge up to the required voltage. It did not happened on my setup.

I had re-read the datasheet for the FR6869 device. I think if you have parts, you can try to replace the LCD CAP 4.7uF w/ 10uF. I am not sure what I was using on my unit, it may as well be 10uF. But for the kit I assembled for you I had put a 4.7uF as this is the "normal" value recommended on the datasheet. OTOH in the same document, when mentioning low power LCD supply currents, the setup for measuring used is w/ a 10uF CAP.

If you are interested the datasheet can be found here.

I hope you are able to resolve this. Another option is to apply a half second delay before updating the segments during power on. As a matter of fact, many code example I encounter does this.

I have the feeling this might be related to a bad battery. I'll investigate...