I bought this "sensor board" off of eBay, and like most components from eBay it came in an anti-static bag, inside a padded envelope, from China. No documentation, no links to documentation, nothing. http://www.ebay.com/itm/260874068947?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
It has the following pins, and their assumed meanings: AO - analog out? GND - ground VCC - voltage(5v?) DO - digital out?
It has an electret mic, and I guess this is an envelope follower IC(?), has anyone worked with this? Does anyone have a link to documentation for this thing, or should I just setup a digital pin as input, analog pin as input, and fire up the serial terminal?