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