Circular RGB PCB

I spent some time over the weekend making the RGB version of the cufflink as small as possible, in particular the PCB. The overall size is limited by the cell being 12.5mm diameter. It is differrcult to embed the fixing screws in the same way as outlines for rectangular ...

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Miniature RGB

I designed a prototype PCB in kicad and then ordered a small batch of them from the great oshpark.com. I used interesting method to solder them, put the PCB on a standalone electric hotplate, move the components in to place with the aid of a USB microscope.

This actually ...

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