KA2281 integrated circuits, LM3914, etc. According to the vu meter circuits with this circuit has been built on microcontroller circuit pic16f88 stereo really super 2×16 total 32 or mono 16 led, 40 can be… Electronics Projects, Microcontroller Controlled VU Meter Circuit “led projects, microchip projects, microcontroller projects, pic16f88 projects, “
KA2281 integrated circuits, LM3914, etc. According to the vu meter circuits with this circuit has been built on microcontroller circuit pic16f88 stereo really super 2×16 total 32 or mono 16 led, 40 can be used in the form of a burning LEDs the led dot bar looks very nice, but very complicated in different functions have led links the author has prepared a simple printed circuit board with a practical method vu meter circuit eagle schema, pcb drawings and follow the video source, you will see the hex codes for the given test asm, to-do list.
Source: MICROCONTROLLER CONTROLLED VU METER CIRCUIT alternative microcontroller-controlled-vu-meter-circuit.RAR alternative link3