Hello, Yesterday I started building a new project for reactive led lighting. I found this thread -> https://forum.arduino.cc/index.php?topic=476900.0 and this configuration http://i.imgur.com/Aop9U1r.png which is this schematic https://forum.arduino.cc/index.php?action=dlattach;topic=476900.0;attach=211774 if I'm not mistaken. I use this female 3.5mm part - http://www.powerstroke.org/forum/attachments/6-0l-electronics-discussion/242274d1392268638-wiring-aux-3-5mm-headphone-jack-diagram1sm0.jpg and connecting the GND to 1 and 5 for the audio. Arduino keeps reading 0s. If I put my multimeter (set at 20v DC) across the diode, I get 0.00-0.02 (very rarely more than 0.00). If I put the multimeter across pin 1 and pin 5 of the female socket, I get ~-2.50 - 0.02. What's wrong here ? I tried removing some parts 1 by 1 like the capacitor and then the 100k OHM resistor and saw some values but they seemed totally random. Any ideas ? Cheers!
edit: I was using my Xiaomi phone with the volume set at maximum if that matters.