RE: Have improved my earth battery set-up but now I have a question for the community 💡

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Interesting project, Good idea to use the galvanised screws as it should give you more surface area. We used to use the zinc we found in spent batteries for the electrode.
I was interested to hear that you are getting 1A at 5V from this set-up. Did you try testing with a load in series with your multimeter?
As far as the cable goes did you check for continuity? It should be 5v and ground at either side of the plug. It could be a damaged wire.



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(Edited)

Good idea to use the galvanised screws as it should give you more surface area

I actually hadn't considered that but I did observe how these small screws produce a similar output to the much longer bolts which have a flat surface. This must be why! Thanks for clearing that up in my head.

Am a bit new to the electrical side of life so I don't know clearly what you mean when you say "Did you try testing with a load in series". Are these cells not already in series?

It is possible I am not understanding how to read my multimeter?

I see a small m on the meter when I am reading Amps, but struggle to believe this is producing just one 1000th of an amp.

I checked the resistance in those two cables (black and red) and they seem good, giving me a strong reading, so I don't think it relates to damaged wires.

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Sorry for the delayed response. I believe you need to check the amps like in this image. Where you let the electricity flow through the bulb and through the multimeter. This way you will get a better idea of how many amps the bulb draws and how much the batteries can give.

I am still learning myself but really find all this fascinating.

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