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Part of learning about electronics is just messing around with LED blinkies - lights make everything better!  Well, the LM3914N is a led bar driver, that is, it can, with some power, light up a bunch of LEDs at once in response to a signal.  In this case, VU meters respond to audio signals and essentially shows the volume as a function of voltage.

This video shows how to set one up, and some of the troubleshooting I had to use to get it working the way I wanted it to!
Bring on the schematics
It's actually the schematic from the datasheet :)

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Bio: Every week two geeky people in Rochester MN spend every ounce of their freetime creating educational videos, podcasts, articles, and music. They publish it all ... More »
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