ere is High performance LM3914/LM3915 vu meter circuit projects that can display with 20 LEDs on stereo or mono with 10 LEDs for all audio system. and can easily build and cheap you must happy when use it. This electronic VU meter set is circuit that High performance and widely popular than 40 years.

This project is very easy, because use alone IC only and a few external components. The display system can drive directly LED up to 10 LEDs and display as light running is DOT or BAR as you want follows by Figure 1

The working principle

企业名：深圳市宝森达贸易有限公司

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0755-83277893
0755-83281283

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地址：广东深圳深圳市福田区华强北路现代之窗B座25L