A rectifier using only one-half of each cycle to change AC to pulsating DC. Thus, it can cause a flickering effect.

A piece of metal attached to an electronic component (such as triac, transistor, or voltage regulator) that serves to dissipate or absorb unwanted heat. Many electronics components have two ratings, a lower one when a heat sink is not used and a higher one where a heat sink is in place. Also called a dissipator.

A star (Bethlehem Star, East Star) Richard Holdman in Utah created in 2006 for his display. Learn how to make one here: http://www.holdman.com/christmas/star/