Aug 29
NPR for free on a well-tempered Arduino
I just built a little audio amp using an LM386 chip and the Little Gem amplifier circuit. I plugged it into my Arduino and programmed up a little well-tempered scale. I found to my surprise that if the Arduino was off and I touched the amplifier input, then I got very faint speech out of my little speaker, which I am pretty sure is NPR!