The sound controlled melody lamp is powered by CR2032 battery
Open source: GPL 3.0
Step 1: Function Description
The voice-controlled melody lamp is composed of two common transistor amplifiers and 5 LED lamps
It can convert the external sound into electrical signal through microphone microphone, so that the LED light changes with the external sound 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 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 modified ,can be easily made in Easyeda and get manufactured in JLCPCB, The total cost will not over $1 for each pcs.
BOM list also enclosed for reference.