Morning Ode,
To my recent surprize, putting a 20K ohm resistor in series with
one electrode with 36 volts DC, 1 1/2" electrode spacing / 6" x #12
wire electrodes.....does a pretty decent job.
Do you consider the 1.5 inches about optimum?
I use them as wide as the big mouth jar will allow.
I use a piece of acrylic with small holes drilled close to the wire
diameter. I have two sets of holes. One must go back to some
smaller container opening.
This piece of acrylic is square and larger than the top of the jug.
It provides a nice space for a weight to hold the light weight
assembly in place a bit more solid and resist slight pressures from
the wires and alligator clips.
I don't like for any part to move any.
I suppose as long as I use the same spacing and other parameters,
everything should remain uniform.
Of course you know and understand, but others may not, ..........
The effect of the 20 K resistor is determined by other loads in the
series circuit.
The LED has some forward resistance but I have not bothered calculating it.
Also, in my generator, even though it is a totally DC unit, I have a
full wave bridge to handle polarity uniformity, in case the input is
reversed due to building wiring. I have seen it happen.
These diodes in the bridge also have some resistance. These add to
the resistance of the batch, which is changing. All the other
resistances should remain near constant.
One day, I am going to set up an analog input unit to record and
datalog all this. I have a nice 8 channel analog input unit waiting
to do the job. Likely it would take two hours at max.
It might take two more to do the scale factors and code the data to
the exact values I would want.
I have a default time between data log records but I might want to
make this a bit faster. My system will write both a DBF and C binary
file. I can output a report in plain ASCII. Everyone and all
computers can read that.
Wayne
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