This 220 Volt disco lamp circuit is not a voice switch (VOX), because this circuit is too dumb to differentiate between musical sound and human voice. This is more of a voice-activated sound activated. An interesting application is to control the lighting in your disk automatically by the musical sound of high-power amplifier, when the music signal is dominating the sound space. Light nightclub circuit schematic diagram is shown below.
You can use the microphone coil or condenser microphone for this circuit. Make sure that the electrolytic capacitor is rated for 16 volts or more. The potentiometer is shown in the diagram is used to adjust the gain of the pre-amplification. You can adjust this knob to get a proper sound level of the relay would be activated.
Part List Of Disco Lamp circuit
- R1 : 22k 1/4 watt resistor
- R2 : 4K7 watt resistor
- R3 : 2K2 watt resistor
- R4,R8 : 10K watt resistor
- R5 : 33K watt resistor
- R6 : 56K watt resistor
- R7 : 1M watt resistor
- Potensio: 50K
- C1 : 470uf/35V electrolytic capacitor
- C2 : 22n ceramic capacitor
- C3 : 100n ceramic capacitor
- C4 : 1Uf/50V electrolyticcapacitor
- D1 - D5 : 1N4007
- D6 : Zener 5.1v
- D7 : 1N4148
- IC : CD 4069
- SCR : FIR 3D
- Mic : Mic Condensor
