| This project is a sound level meter circuit that easy and very cheap, can drive 9 LED display,The LB1409 is used as base of this circuit makes them has small size. This our circuit is simple that is designed in a modern style. Which uses the LB1409-IC1 alone, but can drive LED up to 9 LEDs. So provides light beautiful than the old. LB1409-IC is evolved from LB1405-IC, Which LED driver has a 5 LED, by improving provide ability to drive LEDs up to 9 LED, and can connect to use both measuring AC, DC. [...] Read more : Sound level meter circuit using LB1409 Best Regard,
Momename
http://www.eleccircuit.com/
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