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
Title: Dancing Lights
electronic circuit
Source: www.electronic-circuits-diagrams.com
Published on: 2005-02-01
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