LOSING EVEN A FEW WATTS OF AC-LINE POWER HERE AND THERE ADDS UP. BY USING NEW TECHNIQUES IN LIGHTING, MOTOR CONTROL, AND STANDBY/CHARGER CIRCUITS, YOU CAN DRAMATICALLY CUT THIS AGGREGATE WASTE. IF YOUR APPLICATION, SUCH AS A CELL PHONE, GLOBAL-POSITIONING-SYSTEM (GPS) RECEIVER, OR LAPTOP PC, RUNS ON BATTERIES, YOU'RE PAINFULLY AWARE OF EVERY MILLIWATT OF POWER THAT IT REQUIRES. AFTER ALL, YOU FACE A FIRM BOUNDARY ON AVAILABLE ENERGY: WHEN THAT BATTERY DRAINS, YOUR PRODUCT IS LITTLE MORE THAN AN EXPENSIVE PAPERWEIGHT. HOWEVER, IF YOU ALWAYS HAVE THAT AC LINE AVAILABLE, YOUR POWER CONSTRAINTS MAY SEEM TO INVOLVE SOLELY YOUR AC/DC SUPPLY RATING, THERMAL ISSUES, AND PERHAPS ENCLOSURE SIZING. YOU'RE CONNECTED TO WHAT SEEMS TO BE A SUPPLY OF INFINITE CAPACITY— THAT AC SOCKET CONVENIENTLY CONNECTED TO A HUGE GENERATOR SOMEWHERE. YOU CERTAINLY DON'T WORRY ABOUT RUNNING OUT OF POWER.
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