Last year we released a set of six equation-heavy “Download and Print” cards for Valentine’s day.  This year, we’re doubling the size of the collection (to twelve!) by adding six more cards, this time heavy in symbols, not equations:

“You turn me on” …with an SPST switch.

“I can hardly resist you.”

There is room for a future superconductivity joke here, involving a phrase like “I can’t resist you (below a certain temperature).”

You can download the full set — including the 2013 cards — here, a 500 kB pdf document.

As with last year’s set, print them out on (or otherwise affix to) card stock, and [some steps omitted] enjoy the resulting lifelong romance.

Update: New cards have been released! Please check out the 2019 set, which contains all 42 cards from 2013 through 2019.