We review products independently, but we may earn affiliate commissions from buying links on this page. Terms of use. As well as being a very cheap computer solution housed on a single, credit-card sized board, the Raspberry Pi can easily be added to using Hardware Attached on Top (HAT) add-on boards. There's already a huge range of HATs available, but the Raspberry Pi Foundation launched a new one today that means the Pi requires one less cable. As Roger Thornton, Principal Hardware Engineer at the Foundation explains, the March 2018 update of the Raspberry Pi, which introduced the Pi 3 Model B+, also added a new Ethernet power feature. It meant instead of connecting both an Ethernet cable for data and a second cable for power, you now only need the Ethernet cable if you have the appropriate HAT. Today, that Power over Ethernet (PoE) HAT became available for a mere $20. It uses the most common PoE standard (802.3af) making it compatible with as large a selection of network switches that ship with PoE as a feature. The board itself slots on top of the Model B+ (just like a hat!) and still allows the Pi to fit inside a standard Pi case. You'll notice a 25mm fan is attached to the board. This was included as the Foundation sees the PoE HAT being used in "tougher environments" where the Pi may run hotter. The fan is controlled using a small ATMEL processor and can be setup to turn on only when the Pi processor hits a certain temperature. The PoE HAT allows for up to 15 watts of power to be supplied over an Ethernet cable, which is more than enough for the Pi. Additional HATs can be stacked on top of the PoE HAT, but you will require longer pass-through headers for them to work, which aren't very expensive. The Raspberry Pi PoE HAT is already available to purchase for $20 from a growing number of retailers on the Foundation's approved reseller network.

weiterlesen: RSS Quelle öffnen