Step 9:
Still another one of our night lights (this one is kept at the top of the loft stairs) has a jumbo white LED mounted near the top cover and angled downward. This spotlights the main image on the night light bottle and also brightens up its lower reaches.
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richardcole
says:
Jan 22, 2011. 1:45 PMReply
can u tell me why this circuit use for one led and simple battery is could be only make by battery and led why Circuit use i watch u guys make circuit ... can u tell me why circuit need for this type even very simple look...
5
TinkerJim (author)
in reply to Jan 23, 2011. 7:06 PMReplyA white LED needs over 3V to operate, so one battery won't do it. Moreover, the circuit will keep lighting the LED until the battery voltage drops down to around half a volt.
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