The galvactivator is a glove-like wearable device that senses the wearer's skin conductance and maps its values to a bright LED display. Increases in skin conductance across the palm tend to be good indicators of physiological arousal --- causing the galvactivator display to glow brightly. The galvactivator has many potentially useful purposes, ranging from self-feedback for stress management, to facilitation of conversation between two people, to new ways of visualizing mass excitement levels in performance situations. The galvactivator puts into practice new ideas about technology-enhanced affect communication, as it measures one of the important aspects of emotional information from the human body and translates it into an easily understandable display.