Digital Sound Level Meter with ATMega328 microcontrollerDecember 28, 2011

This circuit is a digital sound level meter with a LCD screen, capable of displaying 80 characters (4 rows with 20 characters on each). You can build this LCD display. It also provides more debugging information, such as the minimum and maximum analog-to-digital samples that were measured during each period.

[Cooking Hacks] We recommend Arduino Lab Kit to make this hack!!

Via: Electronics-Lab, Source: Nerdskits

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