The LED torch circuit

Published:2011/6/10 3:08:00 Author:qqtang | Keyword: LED torch | From:SeekIC

Generally, a problem of the small torch is that the life span of the battery is too short. According to the statistics, the power of a common torch is about 2W. See as the figure, the LED torch consumes power of 24mV/s, so 4 cells of No.5 can provide with more than 80 times of services(which means it can use for a month). Though the brightness of the torch is not high, but it is enough for ordinary torches. One of the cores of the torch is a 7555 time based circuit( the ordinary 555 can be used ).



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