The 2021 Christmas Card

Happy Holidays!

Is that time of the year again, and a new Christmas Card is born.

As earlier years we have made a PCB card and programmed it to assist with the holiday spirit creation πŸ™‚


Each year they have a different look.

This year we created a Gingerbread-girl. As you can see the body is made of pure FR4.

Almost ready to ship out!
The solder-mask is white and we used that to add some details πŸ™‚
Metal hair!


The schematic for the circuit is very simple, and looks like this:


The Christmas card is compatible with the previous used firmware used on the other side of this URL.

Creative Commons License

And remember that this work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

How to program it?

The main “brain” is an ATtiny10, which can be programmed through TPI.

Remember that the programming voltage has to be around 5 volts.

The Christmas Card can handle this, but the battery cannot.

So an external power source has to be present (and the battery cannot).

The programming happens through a tag-connect-header designated P1 in the schematics.

From the first “benchtop” test!


The β€œmini squid” cable from the ATMEL ICE can be used to connected the different signals according to the pinout given here.

Signal – Mini-squid pin
GND – 2
VCC – 4 // Note that this does not supply the card!
!RST – 6

The Stand

As last year does the card stand in a “snow mound” that looks like the image below. It was in in house designed and 3D-printed.

The Result

πŸŽ„πŸŽ… Merry Christmas! πŸŽ…πŸŽ„

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