as shown in the figure for non-contact color lamp control circuit.
The controller includes music IC CIC2851, drive, BG1 and BG2, thyristor SCR and so on. When you press the switch when AN CIC2851 is triggered, its output (3 pin) output music signal, which after BG1 and BG2 amplifier, the signal-driven speaker issue sound of music. At the same time, bi-directional thyristor SCR is triggered via-, linking the Lantern LN lit. As the music signal in frequency and intensity of different, SCR conduction angle changes, thus making Lantern chain changes with rhythm and issued the corresponding light. Regulation w to change circuit of music playing time, you can change the lights flashing time chain.
Adjust R3 can also change the strength of SCR trigger signal, if carefully to debug, you can make the bright Lantern chains of flashing up the most. Each AN at a time, playing a music, chain of lights flashing with a period of time.
If AN Exchange switch and closed, the continuous music playing, chain of lights will Flash continuously. Music can also swap other models of integrated circuits in the circuit, transistor BG1 and BG2-3DG6 and 3DG130, respectively, requirements β ;60,SCR alternative 3CTS3A/400V.
Lantern products sold in chain selection. The circuit can achieve Lantern lights out changes with the changes of rhythm, and can make people listen to wonderful music, which can be used to add programs and happy atmosphere of the occasion.