headerscrew-terminal
I have the following board and I need to convert the 2 row 40 pin female header to screw terminal blocks. The pitch is 2.54 mm both horizontally and vertically. I've looked at ones such as this https://www.sparkfun.com/products/10571, but I was wondering if there was a 2 row solution somewhere out there?
I've been searching for a couple of days and any pointers would be helpful. Here's the board:
For a cheap solution, I would cut one lead off of a resistor, then lay it across all of the pins in your female-male header. Then solder the lead to each pin. In the following image, the green line represents the lead, and the red ellipses are the soldering points.
For a similar requirement, converting a 20-pin header strip to screw terminals, we fabricated a tiny adapter PCB with screw terminals like this one:
The screw terminals are on 0.197" centers, and they interlock nicely on a 0.2" pattern.
The PCB used was thus:
The screw terminals are arranged in two rows atop the PCB on opposite sides of the header strip, facing outward for ease of connecting wires. The 0.1" header strip is on the underside of the PCB, facing the board to be connected to - Either make or female header strips are soldered in, depending on requirements.
You could as well fabricate this using single-sided stripboard or veroboard, just that the header strip on the underside would then need to be soldered with a bit of finesse.
Another such adapter board of ours uses the screw terminals all on one side of the header strip, with a bit of a gap between the 2 rows of screw terminals. That version's a bit fidgety to use though.
Best Answer
You could make an adapter board which would have
I haven't seen screw terminal with the right pitch to mate with (or replace) your female 2x20 connector. I doubt that such screw terminal connector exists.