The project designed is a controller for music color lamp.The whole circuit is composed of three parts:music rhythm regulator,volume and tone .
After the audio signal input,the light illumination relay,LED brightness and its numbers are controlled by output signals amplified through the triode.We use the monostable circuit to control the volume made by the NE555 time-base circuit which formed the multiple harmonic oscillation circuit to achieve the light illumination of the circulation rhythm section and realized the tone component with high and low pass filter circuit.
The color lamps change with the rhythm of the tempo,Two different coloured lights show the input tone changes and the lamp brightness increases with the louder input volume,which is the entire music color lamp controller scheme.
Key words:555 time-base circuit; music volume; rhythm; tone