The ripple is practically 0mA when driven on the low 6mA current, it changes to about 50mA at maximum current (200mA). I do smooth that out with a parallel capacitor.
As it adjusts the tube brightness according to the amount of ambient light, it is a bit difficult to say how long a battery will last. I will need to measure an average reading over one day, or maybe even one week. As what I can see now, I would say the average reading requires around 50 - 75mA for say 1.5 seconds per reading. I am pretty sure the battery will last for 1 year, but more accurate measurements need to be done. The battery I use is 750mAh and can easily supply 200mA. There's also batteries that are around 1200mAh but can only supply 50-75mA. If the watch is mainly used indoors, a long life battery would be sufficient. Anyway, this all needs further testing. Michel On Apr 14, 9:13 pm, Dekatron42 <[email protected]> wrote: > Very nice to finally see some pictures/videos and figures on what we > can expect! > > A long life test with simulated user behaviour would be excellent, I > am sure that it is on your list but the sooner you show a figure of > that the sooner we (I) will know what to expect of the battery life. > > Also as Jens says it is important to check what the battery > manufacturers say about sudden power usages from the battery as some > batteries do not like that at all. You might already have thought > about this and used a capacitor as the ripple current storage, I have > not seen any comments on that. > > /Martin > > On 14 Apr, 04:23, Cobra007 <[email protected]> wrote: > > > > > > > > > On Apr 14, 5:14 am, J Forbes <[email protected]> wrote: > > > > What battery are you using in the prototype? is it the same one you're > > > planning to use in the watch? > > > Yes, same battery 1/2AA size. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
