Ah, yeah 10µ FTW - time to rerev the board...
Just as a NB I've had a bare MDBT board connected to a 4 digit 7-segment LED (usually off) that's lasted about 2 weeks on a dodgy CR2032. Dodgy because it was about 3 years old when I found it and put it in the device. There's also a .22µF ceramic bypass cap which may be helping with the rampup time.
Even a new 2032 has about a 30Ω internal resistance.
If the LEDs are always on 3.5 days sounds about right - I mux them and also have a button that turns them on for 10 seconds.
I'm working on connecting a DS3231 to an MDBT. 4ppm, and battery backed up. Since it's i2c, should be pretty trivial to interface.
and this was a holiday weekend for some of us, might explain the lack of response
I like the idea, also 'ring sized watch' :-)
Authors of accepted pull requests get a free one if I ever make a kickstarter/indiegogo/etc (max of 2 per person)
Now smaller, with a bootloader button and bypass cap!
Rev 0.2 will have a readable silkscreen for C2 and R7
@Gordon Yeah rev 0.1 will have bypass caps, for some reason I thought there were caps built into the RayTac board so I didn't need to add them. Also gonna get some paste and try reflow since the board will be even smaller this time...
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