Doctor Who Tardis Earrings – Pulses as it moves through time

My two daughters LOVE Doctor Who, so a couple of years ago I decided to make them some Doctor Who themed earrings.  I was under the illusion that they might actually wear them,  Little did I know that what they say and what they do are definitely not the same thing.  Of course they don’t tell me until i finished the earrings that they would not be seen dead in them.

They are for sale on Etsy if you are interested.

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Below is the schematic which as you can see is exceptionally simple

tardis_schematic

The hardest part was getting the circuit board silk screen perfect and the right size.  Eagle Cad allows you to load a bitmap as a silkscreen.

The circuit boards were ordered from Seeed Studio.  I only ever use Seeed to get the blue color boards.  I always use OSHPARK for prototype boards, but they only do their signature purple.

Hope you like these.  I went through many prototypes before I got it right,

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