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I have seen numerous flashing light
badges at trade shows and conventions. They are often handed out as gifts to promote
some business. The devices often use inefficient circuits, which cause the battery
power source to be quickly depleted. My circuit is simple but efficient enough to
provide months of continuous LED flashing. It also has a tiny push-button switch to
turn on and off the light flashing, extending battery power.
Click on Drawing Below to view PDF version of Schematic
