Electronic circuits > Lights & L.E.Ds > Dancing Lights
Dancing Lights Here is a simple circuit which can be used for decoration purposes or as an
indicator. Flashing or dancing speed of LEDs can be adjusted and various dancing
patterns of lights can be formed.
The circuit consists of two astable multivibrators. One multivibrator is
formed by transistors T1 and T2 while the other astable multivibrator is formed
by T3 and T4. Duty cycle of each multivibrator can be varied by changing RC time
constant. This can be done through potentiometers VR1 and VR2 to produce
different dancing pattern of LEDs. Total cost of this circuit is of the order of
Rs 30 only. Potentiometers can be replaced by light dependent resistors so that
dancing of LEDs will depend upon the surrounding light intensity. The colour
LEDs may be arranged as shown in the Figure
Published on: 2004-08-21 (3240 reads)
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