The RGB Beacon is a small hackable RGB LED based on the ATTiny13a. In addition to a undeniably funky LED, the beacon also integrate a tactile switch and a potentiometer for even more goodness.
The MCU inside the Beacon is a ATTiny13a clocked at 9.6MHz using the onboard oscillator.
The RGB LED is the common anode ASMB-MTB1-0A3A2.