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by jimmyswimmy
1225 days ago
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Been using one of the Analog demo boards, I think one of the ADIN1100 parts which is 10BASE-T1L instead, to solve a problem that occurred when I let a mechanical engineer order a cable for me. No twisted pair inside. Ethernet on either end. We barely found space inside the pressure vessel for the demo board (project at this point running on fumes, so instead of designing a tiny little board with just the few required parts I bought a pair of these boards), and connected the other one to the other end of a pair of wires in the cable. Astonishingly, not only did it work the first time, it worked well enough to stream video. I'm hoping to see a more standardized PoDL interface crop up so that I can use two wires for data and power combined, for lower-power subsystems. There's a lot of application for this standard, I hope it catches on enough that I can keep buying chips for it for a long time. |
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The reason I wanted to use it is power consumption. I had previously planned to use 100BASE-T (normal 100Mbps ethernet) in a robotics project but it turns out that it uses about 0.8W per port (1.6W per cable) so it was using by far using more power than my various microcontrollers. Faster ethernet uses even more power. There is a standard for low power ethernet but it's not a huge improvement and you really have to go out of your way to select components to use it.
I ended up using CAN, but it will be really nice when these standards become well-supported.