If you are engineer in love than you should take an advantage and build something beautiful for Valentines day. So why not go with flashing heart. Mike suggests building simple PIC12F629 based heart powered by single CR2032 battery.
He designed through hole PCB so anyone could easily build and assemble. The shape has 12 – 3mm red LEDs placed around. With single button it can be turned on and different flashing modes selected. He shares all building plans and asm code in case you would lake to tweak something. So don’t hesitate and build one as small things can mean a lot to someone.