I am trying to figure out how the magic "chip" inside the iPhone headphones works to control play/pause/volume. This Pinout shows the L/R/Gnd stereo connections + microphone connection of the 4 conductor iPod headphone jack. It also says that shorting out the mic to the ground is what the button does. It is impossible to find a diagram or any info on how the new 3GS remote with volume control works because most search results show only headphone reviews or products to buy. There is no power running to the remote so there can be no real circuit. This means they are most likely shorting out the mic with different resistors to create the additional 2 (vol +-) signals into the iPone. I would like to make my own iPhone remote so that I can make a larger one for use while skiing and operate it with gloves on and will require no batteries. If anyone has any idea how the remote works that would be a huge help. I will have to grab the multi meter and start testing things I guess.