In two earlier posts, i described the general idea on how to connect Brain Vision Recorder, a Magventure TMS and Localite Software, and how to make the box. In this post, i will follow up, and describe how to design, solder and test the circuit.
What you need:
What you will need is the box made earlier. Obviously, you will need a soldering iron, a solder lead, and a batch of wire. A plier and multimeter will also be helpful.
What to do:
I attached a small diagram of how to connect the circuit. You can find the information about the proprietary pin layout for the D-SUB 26 connected to Brain Products BUA in their manual, and the D-SUB 25 uses the standard industry norm. Because Brain Products offers 16 channels for stimulus and response recordings, you are open to select, which channels you want to use. The circuit i used is using the first three bits (D0 to D2) common to D-Sub26 and D-Sub25.
First, prepare three isolated wires, so they fit in length comfortably from the D-SUB 26 to BNC to the D-Sub 25 and cut them at the length for the BNC. Prepare one blank wire long enough to bridge the ground solder lugs of the BNC connectors, and another one to bridge the grounds of the D-SUB 25. Prepare two more isolated wires, to bridge the BNC ground with D-SUB grounds. I used two different colors for the isolated wires, to keep everything organized. Additionally, be aware to leave a little bit overhead. Sometimes, the BNC connectors turn a little if mishandled, and if the wires have some freedom to cope with this, the whole circuit will be more robust. When you begin to solder everything, i suggest to start with bridging BNC-ground, followed by D-SUB 25 ground, before connecting BNC with D-SUB. This way, the higher layers are not in the way.
Finally, test the circuit with your multimeter for connection and unwanted bridges. Close the box, and you are done with the hardware part!
Put shortly: This post describes a way how to solder the circuit for connecting BVR, Magventure and Localite .