tinyCylon

The tinyCylon is built around a Atmel AVR microcotnroller, the ATtiny13.  It is already pre-programmed with multiple LED sequences.  If you have the right equipment and software, you can re-program the chip with your own patterns – even after it has been assembled!  The tinyCylon comes with a 3xAAA battery holder with a cover and power switch.  Three AAA batteries are required but not included.