I used aluminum and aluminum on one cell
copper and aluminum on the other two cells
I forgot to stir one of them.The other two were stirred.
When wet the copper and aluminum showed.52 volts easy.
The other cell showed.018 volts when wet(same metal).
Now 30 hours later the cell not stirred shows a voltage running about.145.The other two show nothing at .001 volts


So the cell where I forgot to stir the salt sub into the glue now produces the highest voltage.I noticed on the underside of all of the cardboard squares an area that feels like sandpaper.So that tells me dissolved chemicals made their way through the cardboard during the drying process.


If it is producing power tomorrow I will consider it a limited success.
I used aluminum pull tabs from soda cans since they were on hand and leftover pieces of copper wire from an electrical job on the house I'm in.They too were on hand. triffid

It looks like to me that these chemicals need to be layered not stirred at all except for getting the metal electrodes into the mass.Then you have to poke them in a little.triffid

Other metals I have on hand are tin can lids and copper discs.I will try those next.I used elmers school glue IB2 said to use elmers glue all.
I will have to make more cells.triffid

@triffid


Elmer's School glue and Elmer's Glue All are two very different glues, its best to use the Glue all.

My one good cell is still producing over.145 volts with readings close to .199 volts.It does jump around a little. its about 31 hours.triffid
Maybe pressure sensitive?