Electronics > Beginners
DIY Oscilloscope Probe Ground Spring
Simon_RL:
I recently bought a new Hantek Oscilloscope and it didn't come with any ground springs. So I figured I will make some as I need them for a current project. Other than the wire needing to be stiff are there any other requirements, like low resistance? Is there a specific wire that I need to get?
BravoV:
Random image from Google
If you mean the one like above example, yep, they get lost easily, I made my self, use piano/guitar wire, wind it on a stiff steel, such as a nail, but abit smaller in diameter compared to the probe's ground near tip, as it will un-wind a bit by itself, it will be nice fit & snug to the tip, suggesting to do trial and error 1st.
Reheat with hot air if needed during the winding at certain wire.
Actually copper wire works too, but not as robust as the steel wire, once the winding is done, wrapped it with heat shrink tubing to maintain the tight winding.
Simon_RL:
--- Quote from: BravoV on February 15, 2020, 03:15:23 pm ---
Random image from Google
If you mean the one like above example, yep, they get lost easily, I made my self, use piano/guitar wire, wind it on a stiff steel, such as a nail, but abit smaller in diameter compared to the probe's ground near tip, as it will un-wind a bit by itself, it will be nice fit & snug to the tip, suggesting to do trial and error 1st.
Reheat with hot air if needed during the winding at certain wire.
Actually copper wire works too, but not as robust as the steel wire, once the winding is done, wrapped it with heat shrink tubing to maintain the tight winding.
--- End quote ---
Thanks Bravo much appreciated.
Electro Fan:
If making them doesn't work there are some purchase sources:
https://www.caltestelectronics.com/ctitem/37-5mm-probe-accessories/CT3668
- this is for 5 mm, probably other parts for other diameters available too
https://www.caltestelectronics.com/ctitem/34-probes-accessories/CT2714
tautech:
0.6mm TIG wire wound around a suitable former works fine too.
Anyone with a small TIG welder should be able to spare a few feet for you to experiment with.
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