Hackable Microcontroller-Powered Valentine's Card

compumike writes "If you have a significant other to impress this Valentine's Day, consider putting your programming skills to use. This video tutorial shows how to build an LED Heart Valentine's card, powered by a microcontroller running C code, with a neat randomized 'twinkling' effect in an interrupt handler. Think about it: how many ladies can say that their Valentine's card runs at 14 MHz?"

Invalid XHTML

[XanC]

That's the least page I can remember bearing a "Valid XHTML" logo at the bottom. Ugh.

Something more simple

[hack slash]

If you want to make a special card which lights up, I saw this great little project close to christmas and so I made 9 cards, but instead of watch batteries that would die after a week or so I wired in resistors & USB plugs (strangely the only place I can find solderable USB plugs online/offline is from Maplins [maplin.co.uk]!), all the recipients loved them and most wondered how the blinking flip they were lit up.

Edge lit holiday cards [evilmadscientist.com] (the snowflake one looks much better with a black background & two blue LEDs, one at the top & other at the bottom)

Next christmas I'm going to have to make something even better - anyone have any simple circuit designs on using an LED as a light sensor and then making some more LEDs react by blinking?

nerdkits

[LS]

these guys seem to have a decent piece of the slashvertisement market recently...