iPod

Simple iPhone jack hack

Simple iPhone jack hack

The iPhone’s headphone jack in recessed so that most 3rd party headphones can’t plug into it. But the hardware beyond the recession is apparently standard. To get at it, you can carve away the plastic housing to make it fit. Here, John Sullivan has cut the jack on his Etymotic ER-6 phones. Etymotic ER-6 iPhone […]

RC4560-based headphone amplifier

RC4560-based headphone amplifier

This SMD op-amp project uses the TI RC-4560 dual op-amp chip and a salt water-etched PCB. The builder got the op-amp as a free sample from Texas Instruments and scavenged all of the SMD resistors from old hard drive electronics. The results are not pretty, but they’re functional. The circuit used (with some changes) is […]