Step 1: Function Description

1 The voice-controlled melody lamp is composed of two common transistor amplifiers and 5 LED lamps

2 It can convert the external sound into an electrical signal through a microphone so that the LED light changes with the external sound

3 The LED can flash with the rhythm in the music environment, which is very dynamic.

Step 2: Design Features

1 With small volume, the size of the PCB board is only 3 ×4 (cm);

2 All straight insert device, increase welding plate, convenient welding;

3 CR2032 battery-powered, easy to carry.

Step 3: Design Files

It is a very easy DIY project, can be used to kill time, anything you need to modify,can be easily made in Easyeda and get manufactured in JLCPCB, The total cost will not over $1 for each pcs.

Enclosed the BOM list for reference.