Assuming I would like to extend the length of some motors that comes with short wires such as this or that (or any other)
Assuming the far end of the wire is a strip board that will then be connected to arduino.
What are my option to extend the wire between the motor and that stripboard and how would you connect the wire itself to the strip board?
the first solution is just cut a piece of wire in the length I would like (lets say 50 cm) and solder one end of that wire to the motor wire and the other end to solder directly to the strip board.
another solution I thought of is solder the extension wire to the motor wire and then use this screw terminal block that will be soldered to the strip board. This method give you the ability to change motors easy.
If you solder wires directly to a pcb, make sure you incorporate strain relief, else wire flexing will eventually disconnect the wire by breaking it. Strain relief can be anything, from wire clip, to flex tie through a separate hole, to just hot gluing the wire to the board. the important thing is to ensure the wire cannot move at the point where it is soldered.
No, but in the case of screw terminals, it's not typical to presolder the wires, so there's less of a problem. The issue with soldering is that stranded wire becomes immobile in the solder, and each strand then, when flexed, receives a direct bend/fold at the point where it enters the 'common mass', and therefore each strand can break more easily. A loose wire with the ends trapped in a screw terminal seems to survive longer. Ideally, however, it is still best to immobilise wires entering a screw terminal strip, that's why 'the pros' often ziptie bundles with the wires fanning out to their screw terminals. I worked alongside guys/gals who did this for a living, and their work was both beautiful to behold, and very robust.
For just trying a connection, strip the insulation back 1/2 inch and twist the wire strands together. For more permanent get a bag of appropriate sized wire nuts at your hardware store and screw a wire nut onto the twisted wires. For semi-permanent connections, use the other recommendations.
No, was long ago, in a facility where taking an unauthorized picture would get you an "interview". But, picture a capital F. Wire bundle runs vertically, individual wires turn 90 degrees then are stripped, and the stripped wire enters the screw terminal. Between every 2nd or 3rd wire is a ziptie. Before zipties, they actually laced the wire bundles with waxed string. Phenomenally time intensive, but the end result was quite impressive. These were "instrument assemblers", and the inside of a chassis done by them was a work of art. Would bankrupt any company nowadays, but in general their tidyness made debugging and signal tracking simple.
