Simple LED light Organ Circuit Diagram

This is a Simple LED light Organ Circuit Diagram. This is a fun circuit that can be at parties, for example. The four LEDs flash to the beat of the music. The light organ responds using a microphone to sound.T1 amplifies the signal from MIC. The sensitivity can be adjusted by P1. T4 controls the LEDs. 

These are preferably LED's with a high light intensity.MIC is a condenser microphone. The circuit can be powered by a 9 V battery.

 LED light Organ Circuit Diagram

The 4 Budget

This circuit costs about € 6.15.


Parts List

•      R1 = 10 k
•      R2 = 330 K?
•      R3, R6, R13 = 100 k
•      R4, R8, R11, R14 = 47 Ω
•      R5, R9, R12 = 1.5 MΩ
•      R7, R10 = 47 k
•      P1 = 220 K?
•      C1, C2, C3 = 100 nF
•      C4 = 100 uF
•      D1-D4 = LED
•      T1, T2, T3 = BC547B
•      T4 = BC557B
•      MIC = microphone capsule