Hello: Another alternative to the photo sensor might be, if space permits, a reed relay. That was how the LED Pulsar watches did it. They had a little magnet the was stored "stuck" to a bit of the band metal.
On Fri, Mar 11, 2016 at 9:05 AM, gregebert <gregeb...@hotmail.com> wrote: > There's no such thing as a 'cheap nixie watch'. It's a lot of work to > design one that has long battery-life and reliability, and you will spend > many, many hours perfecting the design of the DC-DC converter, board > layout, and debugging. Even after 2 years of design work & debug, I found > that mine wasn't rugged enough (died after being carried in my backpack for > 2 weeks) even though it functioned correctly and has excellent battery life. > > Regarding waterproofing, I'd suggest a photosensor, rather than switches, > to set the time/date. The intent on my watch was to use metal contacts on > the sealed case to provide access to the battery for charging. If you go > that route, you *MUST* put a diode and a fuse in the path to the battery; > imagine what would happen if the charging contacts got shorted-out. > Unfortunately, I rushed the final assembly on my watch-case, and one of the > battery charging-contacts is loose, so I cant recharge it. Oh yeah, the > case is glued shut so I have to cut apart the handmade plexiglass case that > took many hours to build & polish. Grrrrr...... > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com. > To post to this group, send email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/5fddb2d1-4574-4aaf-b074-a7cf719e9497%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/5fddb2d1-4574-4aaf-b074-a7cf719e9497%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- ----------------------------------- Scotty swoo...@gmail.com www.linkedin.com/in/scottdavis11 Skype: swooser -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAKQ8oYroHuDJgur6hJ3qQ%2BdqairB9e-914ex61cAd27Sk2i%2B%3DA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
