
How to make a Music Reactive LED using two transistors is shown. Transistors BC 547 and 1815 are used. This is a circuit that can run on 5 volts. This circuit is made to illuminate the LED to suit the sound variation.
Music Reactive LED Circuit :

Components Required :
- BC547 Transistor – 1no
- 1815 Transistor – 1no
- 47uf Capacitor – 1no
- 10k Resistor – 1no
- 1M Resistor – 1no
- 120k Resistor – 1no
- Condensor Mic – 1no
- LED – 6no
- zero Board – required
Tools Needed :
- Soldering Iron
- Past
- lead
- Pcb holding Stand
- Cutter