Talk about a bright idea: this billboard by the Economist uses a motion sensor to detect people walking beneath it, and the light bulb illuminates at just the right moment.
I think this is clever.
Talk about a bright idea: this billboard by the Economist uses a motion sensor to detect people walking beneath it, and the light bulb illuminates at just the right moment.
I think this is clever.
smart! jasvinder:
Talk about a bright idea: this billboard by the Economist uses a motion sensor to detect people walking beneath it, and...