This is VU meter to detect the level of sound signal , use MIC to detect the signal then display by 15 LED, you can apply to detect level of your stereo / Radio , The amount of LED will turn on depend on the level of sound signal which is detected by Microphone.

Technical information:

- Require Power Supply 9-12VDC
- MIC on board
- 1 pot to adjust the sensitivity of MIC
- Current consume 150mA
- 15 LED ( Green / Red )
- PCB size 3.45" x 2.18"

Download User Manual