Header pin duplicator/replicator/expander/breakout? Not sure what to call it.

Hello,

I am looking for some sort of breakout I can use to tap into existing pins. I have a circuit and it has standard header pins sticking up for a connector. What I need is something to place that will allow me to still connect the original rectangular connector and add in a second one that is merely recording voltages of each pin. I am reverse engineering the DRO on a milling machine in order to add in a way to datalog it.

This is a sketch of what I imagine something like this might look like. Does anything like this exist? If not I will just solder wires onto the existing PCB but I wanted to be minimally invasive if possible.

Can always add a screw shield that will let you attach wire easily and still make the female headers available. I offe a couple of them for Uno & Mega/Due footprint boards, including EtherMega & EtherDue:
http://www.crossroadsfencing.com/BobuinoRev17/


Few left of these:

These will start shipping soon, with more power/gnd connections and screw holes available:

Thanks, but the location for this isn't on the arduino, its a 6 pin rectangular/header inside the case of the DRO, then I will lead a second cable to the outside and connect it to the arduino.

I can't open your picture from here.
Maybe you can add wires to the legs of a long-pin female, stick that in your header, and then plug whatever else in the top.

Solder some strip board to the pin side of the socket strip with long legs then a header 2-3 rows out.


Rob