This simple VU-meter allows any kind of audio in and displays its volume on the led bar. Gain is adjustable with potentiometer. Circuit uses LM3915 chip.
Part list
All parts can be found on www.taydaelectronics.com.
- R3, R5, 10k resistor
- R4, 1.5k resistor
- R6, 100k resistor
- RV1, 50k linear potentiometer
- C1, C2, 100nF ceramic disc capacitor
- D1-D10, red, yellow and green leds
- Q1, BC547 or 2N3904
- U1, LM3915 or LM3914 Dot/Bar Display Driver ic
- 18 pin DIP ic socket
