Hand tools and fabrication machines
In less than 5cmx5cm, the black solder mask and HASL finish complement this PCB art to be used as a cute pendant or earrings. Powered by CR1220 3V battery in combination with ATtiny85 low power mode enable days of cute LED sequencing. ISP pads are available to re-program the 6 on board LEDs using Arduino and AVR programmer.
We based the design on Kawaii Tech Logo it is our first KICAD project :P
We used Inkscape and the svg2Mod python script to create solder mask, outline and silkscreen layers to be imported as symbol in KICAD.
We had a hard time generating the shapes with the script in the end we re-shaped the outline in KICAD (manually).
The board uses 3 GPIOs of ATtiny85 to control 6 LEDs with charlieplexing. Since it was a small form factor we wanted to have the less amount of components and routing as possible.
We used Arduino IDE to generate the HEX file and ATMEL ICE.
PCB was manufactured by PCBWay.
We got our BOM from Newark, the battery holder has the same padstack as the one on the Gerber files, but the holder is a little bit different so we had to trim the ends.
We recommend using LEDs with at least 200mcd the brighter the better ;) always check forward voltage.
Gerber files are available on PCBway!
Use them as earrings too!