Dancing LED's circuit

Posted on May 6, 2012

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.

Dancing LED's circuit
Click here to download the full size of the above Circuit.

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.

Leave Comment

characters left:

New Circuits



Popular Circuits

Audio Volume Control with Resistor Switches
Stylus organ
High Voltage Dc Generator Circuit
Wideband Preamp Circuit
DIY USB password generator
led How can I effectively reduce the voltage needed to activate a transistor
mains pulse circuit
arduino volt ammeter final part printed
ISL8107 Single-Phase Pulse-Width Modulation (PWM) Controller with Wide (9V-75V) V
DDS-based automatic tracking frequency ultrasonic generator
GenesisRadio Transceivers
Four flashing lights string circuit 6
Nightlight lighting circuits