I'm a beginner with electronics and I'm building my first solar powered robot. I now have a 50cm long (1.6 feet) small pipe through which I want to put four wires; 2 for the power from the solar panel, and two for I2C to read some sensors. I've got two 100W solar panels, but I doubt I will ever get more than about 120W through it.

I don't know if the size of the wires matter, but currently I'm using 22AWG for the power, and 30AWG for the I2C.

I had some trouble before when the wires from the ESC to the BLDC motor and the PWM wires to a servo where touching eachother. Before I build this part of the robot I now wonder whether I will get into trouble if this I2C and the power are cramped together in the small pipe.

Does anybody know whether this will cause trouble (interference or something)?

  • 1
    \$\begingroup\$ Yes these do interfere. Use. Twisted pair and keep at right angles if possible. \$\endgroup\$ Jan 3, 2021 at 14:53
  • \$\begingroup\$ What is the inside diameter of the pipe? Metal or plastic? There might be some tricks which could help. \$\endgroup\$ Jan 3, 2021 at 15:40
  • \$\begingroup\$ @MarkLeavitt - The inside diameter of the pipe is 4.5mm and it's made of carbon fiber. I'm curious as to what kind of tricks you're talking about! \$\endgroup\$
    – kramer65
    Jan 5, 2021 at 10:32
  • \$\begingroup\$ @TonyStewartSunnyskyguyEE75 - Do you mean that I need to twist the I2C with eachother and the two power wires with eachother? And what do you mean with "the right angles"? \$\endgroup\$
    – kramer65
    Jan 5, 2021 at 10:33
  • \$\begingroup\$ I was going to suggest using flat ribbon cable for the i2c signals, as well as sensor power and ground (i.e. don't connect the sensor directly to the solar panel + and -). But your pipe is probably too small. \$\endgroup\$ Jan 5, 2021 at 15:43


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