Case Modification - Stereo VU Meter


Posted on Feb 6, 2014

This is a quick how-to guide for making a stereo VU meter using the LM3915/LM3916. The LM 3916 is an integrated circuit (IC) that takes analog voltage levels and drives 10 LEDs, LCDs, or vacuum fluorescent displays to represent digital voltage levels just like a VU meter. The 2. 2 uF Tantalum Capacitor is only needed if your wires from the IC to t


Case Modification - Stereo VU Meter
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he LEDs are longer than 6 inches. Although the specs for the LM3916 say you can use any voltage from 3 V to 20 V, I suggest using at least 12 V to power your circuit. So before soldering everything together, let`s just test the circuit on a protoboard. First let`s get everything ready. The following items are what we need for this project: After getting all the components ready, it is time to start prototyping. First to be placed onto the protoboard is the most important piece, the LM3916 IC. Now it`s time to design the permanent circuit. Here is where you can get creative, you can arrange them the way you want them, and find creative ways to put it all together. Here is howI did mine. I used DUBOX connectors (those blue things you see in the picture). By using those connectors I could just use the wires you see in the next picture (hanging from the power supply) to change LED color or simply making longer or shorter wires to reach my LEDs.




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