Magnetic Precise PCB Probing

In addition to PCB vices , I immediately planned to make these probes. I didn't find the ones I wanted. And yes, all the details are very small and require special processing, but the result is worth such an effort.

For making probes, I bought stainless steel spring wire. Specifically, in my case, a wire with a diameter of 0.7 mm will be used. For insulation, a heat-shrinkable tube with a diameter of 0.8 mm is used, its shrinkage is almost three times. Attaching the wire to the probes with simple soldering will not work, at least I do not know such a method. I would be grateful if you tell me such a flux or something else. But there are at least two ways out: the first is crimping into terminals; second - pulse welding. I chose the second method, the more there is something to use.

Also, the probes must be sharpened. At one time I made this wonderful tool , which I still use today. But you can use what you have. But keep in mind, this is stainless steel, it is difficult to process it :)

Magnets are used with a diameter of 9x5mm. The question often arises why I often use this size of magnets ... But the answer is extremely simple - I just have a lot of them. Well, the column (rod) is a carbon fiber rod with a diameter of 4 mm, which is also available. But it is possible from other materials, they are also presented in the list with links.

I usually use 28 AWG silicon insulated wires. The diameter of the insulated wires is 1.3mm and they are also very flexible compared to PVC insulation. Connectors - in my case Dupont. Screws M2.5x16mm.

The probes are designed in such a way that they have complete freedom of positioning, both in height, length and inclination.

PS: Make the length of the probes whatever you want, as you like...

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