|One of the computers connected to the Arpanet|
[2014-10-31] One day before the 45th birthday of the Internet's predecessor Arpanet, 14 nodes communicated via CAN FD during the CAN FD plug-fest. The 15-m network was in line topology with some not terminated stubs. The nodes used an arbitration bit-rate of 500 kbit/s and data-phase bit-rates from 1 Mbit/s to 10 Mbit/s. Of course, this was achieved under laboratory conditions. In the real world with temperatures below zero it might go different. It seems possible to achieve 5 Mbit/s using line topology with daisy-chain connections. For star topologies the bit-rate might be limited to 2 Mbit/s.
The transmission speed of the first Arpanet communication on October 29, 1969 reached only 50 kbit/s, but the network length was several 100 km. I wonder: will anybody still remember CAN FD in 45 years?
[2014-10-28] The Sprayer Controller MIDI from Mueller Elektronik (Germany) is an Isobus job computer for controlling crop sprayers. It is suitable for retrofitting and is an option if the user is just starting out in the world of precision farming.