Heart of LEDs


Posted on Aug 7, 2012

For those who dont like microcontroller projects, pretend the micro is a dedicated LED driver IC that just happens to have been designed to control 30 LEDs in the shape of a Heart (what a stroke of luck!). And it wont be declared obsolete just after publication like a purpose designed IC might be! Using a PC parallel port to control external devices is a popular approach these days but imagine the response when you present Mum with a flashing Heart attached to an umbilical cable running into the next room! No, self- contained is better. The answer is to use a small microcontroller. As the design is derived from the Christmas Star, those readers who saw that article will notice that the schematic is very similar. The major differences between the Heart and the Star are in the physical layout of the LEDs and in the software.






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