One of the neat new features of the Raspberry Pi 3 Model B+ is its support for IEEE 802.3af Power-over-Ethernet (PoE). This standard allows up to 13W of power to be delivered over the twisted pairs in an Ethernet cable without interfering with the transmission of data. The Raspberry Pi board itself provides a PoE-capable Ethernet jack and circuit protection components; the power regulation electronics, which would be too costly and bulky to include on the main board, live on a separate HAT
Regular readers will know that I’m a particular sucker for musical hackery involving a Raspberry Pi. I’ve got two really terrific examples to share today. First up, here’s a guitar effects box from Pierre Massat.