constant current (sort of) colloidal silver generation - cheap and simple

Olderfart

DIY whenever possible, and sometimes when it isn't
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As mentioned in my blog, I am going to reverse my current Dinamed CBD Kush with colloidal silver. After an initial attempt with a small voltage supply, which I fried, I found myself without the hardware, but an imminent need for CS.

So, back to the drawing board I went. Here is what I came up with, in schematic form (don't laugh too hard now :biggrin: ):


CS schematic.jpg


The power source is the battery from my rechargeable drill/driver set. I used 12 volts, anything from 9 to 24 or so would also work fine.

My multimeter is a cheapie I have had for years, any meter that will read in milliamps will suffice. Exactly how to connect for measuring small amperage varies between meters, but pay attention because the low amperage circuit is fused and limited to small amperages, usually something ~200-400 ma. And the fuses are not easily found if you fry them.

The liter jar with the silver wire is the standard setup, lots of ways to do it, details not important here.

The tricky bit with this setup is the large plastic jar with water in it. Any non-conductive container will do, just as long as you can get the wires at least ~~3 inches or so apart. The water in the jar is used as a variable resistor which can be adjusted to attain the ~1 milliamp current ideal for producing colloidal silver. Adjustment of current is achieved by changing the amount of wire immersed in the water, and/or the distance between the wires - deeper immersion or closer spacing = more current. This is easily done if the wires are clipped to the side of the container with paper clips like the ones in the pic below. I used my irrigation water at about 50EC but any tap water would likely do the job straight out of the tap. If conductivity turns out to be too high, start with distilled or RO, and add just enough tap water if needed to allow easy adjustment of milliamps. In my final setup, the wires in the water were small gauge steel immersed about an inch into the water, and about three inches apart. This was just wire I had hanging around, pretty much any bare wire would do.

To operate the setup, I adjusted the depth of immersion to get ~1 ma, and periodically reduced immersion to get amperage back to 1 ma. The key here is that as silver builds up in the solution, conductivity and amperage gradually rise. If you let the amperage get too high, the size of silver particles produced goes up and effectiveness of the end solution goes down. So, you need to adjust the wires periodically to keep the amperage in target range. I found that starting at ~0.9 ma allowed me to re-adjust after a couple hours. The CS solution was done in about 8 hours.

Here is what the rig looked like in operation, absent the water and CS solution:


PB240048.JPG



And here is my fresh jar of CS:

PB240057.JPG



And may the laughter subside before ribs are damaged. :biggrin:

Fire away with questions if interested in this mischief.


Happy CSing peeps. :pighug:

A few of you will notice that this is a slightly abbreviated version of the same stuff in my blog. Sort of a test to compare the amount of attention each location generates. :biggrin:
 
Your attention to detail is great. I love the resistor in the middle. If I remember correctly the amperage can also be controlled by adding salt to your resistor.


My only issue with making CS is that for less than $25 you can purchase enough ingredients to make 100 liters of STS, which should last the home breeder forever.
 
Your attention to detail is great. I love the resistor in the middle. If I remember correctly the amperage can also be controlled by adding salt to your resistor.


My only issue with making CS is that for less than $25 you can purchase enough ingredients to make 100 liters of STS, which should last the home breeder forever.

I tried the salt option first, but for the tiny amperage required here, the conductivity of any salt concentration I tried was way too high and resulted in an inability to get amperage down to 1 ma. Even with my ~50 EC water, getting amperage that low involved not much immersion of the wires.

I also considered STS. The ability to get the job done with only a couple of sprayings was really attractive. However, I found that getting both ingredients was difficult and expensive for me here in Canada.

CS works, and the only thing I needed was the silver wire which was easy for me to obtain. The extra spraying will be a nuisance, but I need to be around taking care of the plants anyway, so I decided to put up with it. And as it turns out, it seems that my silver wire will produce more CS solution than I will ever need, so costs were minimal. By keeping amperage down at ~1ma, the silver wire should last almost indefinitely if the look of mine now is any indication.

Anyway, it seems that I got the job done so far, but it remains to be seen whether my daddy plant agrees. :biggrin:
 
I would like to add something for those who will read this as reference in the future.

CS will only be as good as your amperes and application to detail right?

STS will only be as good as the chemicals you buy. Silver nitrate and Sodium now become variables out of your control in making sts.
In simple terms, I can sell you table salt and package it as sodium.
Now what, with plants in the waiting.
CS,..Is more foolproof.
Until I invent a better fool.
To be considered.
GC
 
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I forgot about this thread and didn’t update it with the results of the reversal I did with cs from this setup. The final talley was 232 seeds off the two small lower branches I pollenated.

You are right though @GeorgeCloney, either method requires that you trust your sources, whether for chemicals or silver. I think the best way around this is to find out where happy seedsters got their stuff. :biggrin:
 
I forgot about this thread and didn’t update it with the results of the reversal I did with cs from this setup. The final talley was 232 seeds off the two small lower branches I pollenated.

You are right though @GeorgeCloney, either method requires that you trust your sources, whether for chemicals or silver. I think the best way around this is to find out where happy seedsters got their stuff. :biggrin:
Attached are pictures of a Dinamed in her final days before giving up her seeds.
The pollen used for this came from Mr.Olderfart.
We can never argue with success.
Thanks Fart:bow:
20210329_094922.jpg

20210329_095023.jpg
 
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