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Sent to fab

A project log for Micro NumiTron clock

Super tiny, Micro clock using a Numitron as its display. Running off a 400mAh lipo battery.

jeremy-gJeremy g. 10/03/2015 at 22:590 Comments

The boards have been sent to fab as of Thursday night, using OSHpark.

I need to source a suitable battery with close to 1"^2 dimensions as I don't want a bulky battery sticking up out of the top of the clock.

Due to size constraints and limited space, I have switched from a DS1307 to a DS1337 the difference is size and the fact that the DS1337 does not have a dedicated battery backup, thus the small super cap and voltage switching circuit on the back of the board.

All parts can be ordered via digi-key minus the numitron tubes. If there is any interest I will make a few clocks for sale once everything is stable in its new form factor.

I'll update again soon.

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