For fans of electronics, especially audio VU meters are often found on devices such as, equalizer, amplifier, tape recorder, and even an audio mixer. Usually found in the VU meter display that the LED lights arranged in a one color or more. But some are still using a needle as long audio devices. At this time we will discuss how to manufacture VU meter classified as very convenient especially for the novice hobbyist electronics for audio applications. The principle is straightforward and simple preparation that requires only diodes, capacitors, resistors and LED lamps as a viewer. Besides those that add the transistor as a switch or a current amplifier when using a lamp that has a larger power capacity. Here is an example picture VU meter circuit is very simple and easy to make.
In addition to using a diode and capacitor circuit some circuit using IC LM 3915, so it may be simpler to create a series of VU-Meter.
In addition to using a diode and capacitor circuit some circuit using IC LM 3915, so it may be simpler to create a series of VU-Meter.
Still dont understand why you need 2 diodes per level
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