Variable Resistance Circuit SOLVED

Ok first off I'm a complete electronics novice so please take that into account when/if offering advice/answers please lol. Now my issue is that I'm trying build 2 colloidal silver makers, one that's 30VDC and one that's 30VAC. I have the two electrical adapters to achieve these two voltages but I need to keep the current at 1mA while the adapters are connected to two silver rods in distilled water. The resistance of the water will gradually decrease as more silver particles are added to the water so I ass u me I will need a variable resistor...? If this is correct then here are my questions: What values would the variable resistor be that I need for this application? Could I use the same resistor for both the AC and the DC circuit or would I need two different resistors? How would I connect the resistor(s) into the circuit(s)? And how can I test the circuit to make sure it's working properly? Any help with this would be greatly appreciated. Thank you.

by SilverSurfer
June 17, 2024

It seems that a constant current circuit (of 1mA) is what you look for. There are many circuits to accomplish this, check for those on the web and try it on the simulator here.

by vanderghast
June 18, 2024

Ya I get that, that's why I'm here asking for advice. If you don't have any please move along. Thank you

by SilverSurfer
5 days, 7 hours ago
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3 Answers

Answer by Hedyyy

Hey! No worries. You need a variable resistor up to 30k ohms. And you can use the same for both AC and DC. Here's about connecting and testing. DC: Resistor between positive adapter terminal and one silver rod; another rod to negative. AC: Resistor between one adapter terminal and one silver rod; another rod to the other terminal. Testing: Use a multimeter to measure the current. Adjust the resistor until the current reads 1 mA. You can go for detailed information about resistors from it and it helps me a lot when I am confused: Hope this helps!

ACCEPTED +1 vote
by Hedyyy
July 01, 2024

Would you suggest a potentiometer or a rheostat for this application? Also is there some way I can make this circuit automatic? Rather than to constantly have to check it and adjust the resistance is there any way to just make it automatically maintain the 1mA resistance?

by SilverSurfer
6 days, 1 hour ago

Should say to maintain the 1mA of current not resistance...

by SilverSurfer
6 days ago
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Answer by mariah9x

You're absolutely right, a constant current circuit is what you need to maintain a consistent 1mA current in both your AC and DC colloidal silver generators.

Why Constant Current is Crucial

Consistent Silver Particle Size: The size of the silver particles produced is directly related to the current. Keeping the current at 1mA ensures the formation of consistent and desirable particles. Safety: Exceeding 1mA can lead to larger, less effective particles and might even pose safety risks. mapquest

+1 vote
by mariah9x
July 03, 2024

You hit the spot! Maintaining DC in the circuit is extremely important for both AC and DC colloidal silver generators to provide 1mA DC. To learn more about such practical applications, Studyfy offers comprehensive resources and expertise to support your understanding and application of electrical principles in real-world projects. Also, on I can write my research paper. This sequence is of primary importance for two key reasons. First, it directly affects the size of the silver particles formed—maintaining the current at 1mA ensures uniform particle size, which is critical for consistently achieving the desired results. Second, security is a major concern; exceeding 1 mA can result in larger particles that are less effective and potentially dangerous.

by JeanParcks
6 days, 2 hours ago

Yes while it does take an incredible amount of Silver to create Argyria I am aware of this potential condition. My grandfather worked for the US Govt and at one point he shattered his wrist and they replaced his wrist bone with a solid silver one. After some time (not sure of duration) his hair turned white and his wrist turned black so they removed it and replaced it with some kind of synthetic but his hair stayed white (which he keot a full head of until he died) and his wrist stayed black. Now I'm going to ask you the same ?'s I asked other responders... Would you suggest a potentiometer or a rheostat for this application? And is there any way I can make the circuit automatic? Rather than to have to constantly manually check and adjust the resistor can I just make it maintain the 1mA of current t as the resistance changes?

by SilverSurfer
6 days ago

PS if I could accept more than one answer I would so I just accepted the first person to fully answer my question that was the only basis. Just FYI.

by SilverSurfer
6 days ago

Today they use titanium rather than silver since there are people allergic to silver (can even get blue blood in some circumstances) and titanium has about the same mechanical resistance/deformation as bones.

As for another problem with electrolysis with water is the possibility that common salt (NaCl) is present and with too high voltage, you can liberate Cl2, gaseous, which is quite toxic.

by vanderghast
5 days, 21 hours ago

So that's a no you dont then?

by SilverSurfer
5 days, 16 hours ago

Be sure to use distillated water to have as little contamination as possible (as basis for your colloidal silver).

by vanderghast
5 days, 8 hours ago

So again that's a no you don't know then correct?

by SilverSurfer
5 days, 7 hours ago

I don't understand the question, can you reformulate?

by vanderghast
5 days, 2 hours ago
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Answer by lisamassa

To build your 30VDC and 30VAC colloidal silver makers, you'll need a variable resistor to maintain the current at 1mA as the water resistance decreases. For both the AC and DC circuits, you can likely use the same variable resistor, but the specific resistance value will depend on the water's changing resistance. To connect the resistor, place it in series with the silver rods in the distilled water. To test the circuit, you can use a multimeter to measure the voltage and current to ensure it's operating as intended at 30V and 1mA. Or visit: rice purity test to get more information.

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by lisamassa
July 03, 2024
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