Sketched out wire harness problem. I need to solve for A and B and make 4 of these.
Current solution: A and B both 9-pin DuPont wire-to-wire connector pairs. So would need to cut off the connector that came with the sg90. The red cable needs to route through aluminum struts.
Conversation
Thought of using ribbon cable for this (initially thought 18 conductors together for 2 drives on one side). suggested IDC punch down connectors for ribbon end. Not sure what it would mate to on board end… wires soldered onto an IDC header?
1
thought this was overkill and just shove 9 separate wires through. He also suggested USB for the red interconnect, though it’s not meant for this use case.
1
One interesting thing… the orange stepper female 3-pin futaba connector is what’s needed at the board end. The cable is even long enough and fits through aluminum strut. I may be able to just make A/B a 6-conductor problem instead of 9.
1
And for the 4+2 N20 problem, the cables at either end are not long enough but together the should do the trick. Remember this sketch is ~ to scale. If so, no red cable/connectors may be needed at all.
2
I could just solder individual wires or use butt connectors like these to connect wires individually.
1
1
1
The main reason to try and create a “middle mile” interconnect (the red bits) is modularity and swappability. I could swap out drive units easily, exchange boards, mix and match undercarriages.
1
I do like the idea of each drive unit being a neat 9-pin connector.
2
Farthest out of my wheelhouse: rest of the wire harness for peripheral and payload function. There are 8 GPIO pins I can make good use of, but the bus options (CAN, UART, SP1, I2C) are black-magic to me. Where might a camera go?
3
1
Replying to
Actually wondering about the camera too. Was considering the same single board for a imaging instrument prototype, but lack of the right direct cam interface has me looking at a different one and a accessory motor controller.
1
Show replies

