Project Muatan Lokal Elektronika Digital.....
There are many 9V chaser circuits that seem to waste about
7V when driving LEDs that are only about 2V. This project is unique, because it
uses only two inexpensive alkaline battery cells totaling 3V for power. Since
most of the waste is eliminated, the cells last a long time.
Unlike the other circuits, this one flashes the LEDs for
only about 30ms each, further extending the battery life. For user convenience,
it has a stepper speed control and a brightness control. At slower speeds and
with reduced brightness, the battery life is further extended considerably.
Mounted in a circle, the LEDs appear to rotate as they step
from one to the next.
>>> for complite illustrations klik here
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