Hello,

I have a buck boost, here is what I have, http://www.ebay.com/itm/282411084410? I use it for electrolysis project, however I want to experiment with different wave forms (Sine Square Sawtooth), . I was looking at wave generators on ebay but I wasn't sure if I can hook them up to my buck boost. I'm using about 20-38 volts and 1-10 milliamp for the electrolysis. I'm on a budget up to $50, I don't have any fancy equipment like oscillators and such, i'm pretty much a noob on this stuff. Thank you for your future help.

 

Hello,

I have a buck boost, here is what I have, http://www.ebay.com/itm/282411084410? I use it for electrolysis project, however I want to experiment with different wave forms (Sine Square Sawtooth), . I was looking at wave generators on ebay but I wasn't sure if I can hook them up to my buck boost. I'm using about 20-38 volts and 1-10 milliamp for the electrolysis. I'm on a budget up to $50, I don't have any fancy equipment like oscillators and such, i'm pretty much a noob on this stuff. Thank you for your future help.

Your buck boost is designed for a dc input and output. If you feed it waveforms it will try it's best to output a steady DC voltage.
You could probably amplify you waveform generator to get higher voltage if that is your problem.

 

Hello,

You could use an audio power opamp to use as amplifier for the wave generator.
This post contains information for the several power opamps available:
https://forum.allaboutcircuits.com/threads/components-selection-guide.65137/#post-448192

Bertus

 

Thank you for your answers. So it looks like from my buck boost outputs to the wave generator, then to an amplifier and then to the electrolysis. I am looking for a circuit that is premade, I am not smart like you guys who can make their own custom board. Is there some type of amplifier circuit I can buy, if so please send me links.

Also what about a PWM? I hear they put out a pulse signal. For example http://www.ebay.com/itm/162514321917?

or

http://www.ebay.com/itm/122272314329?

However with the PWM i'm only stuck with square waves and can't experiment with other waves.

Chris

 

Thank you for your answers. So it looks like from my buck boost outputs to the wave generator, then to an amplifier and then to the electrolysis. I am looking for a circuit that is premade, I am not smart like you guys who can make their own custom board. Is there some type of amplifier circuit I can buy, if so please send me links.

Also what about a PWM? I hear they put out a pulse signal. For example http://www.ebay.com/itm/162514321917?

or

http://www.ebay.com/itm/122272314329?

However with the PWM i'm only stuck with square waves and can't experiment with other waves.

Chris

Maybe it would be best if you told us what you are trying to do.
1 to 10 milliamps for example sounds pretty low.

 

Thank you for your answers. So it looks like from my buck boost outputs to the wave generator, then to an amplifier and then to the electrolysis. I am looking for a circuit that is premade, I am not smart like you guys who can make their own custom board. Is there some type of amplifier circuit I can buy, if so please send me links.

Also what about a PWM? I hear they put out a pulse signal. For example http://www.ebay.com/itm/162514321917?

or

http://www.ebay.com/itm/122272314329?

However with the PWM i'm only stuck with square waves and can't experiment with other waves.

Chris

No. That is not how things are supposed to work.

 

I'm making colloidal silver, electrolysis of two silver wires in distilled water. You don't want your current to run away too high as when the colloidal silver becomes stronger, the more conductive the water is. The higher the current creates larger particles which makes the colloidal silver's bio-availability lower. So I'm trying to figure out how to incorporate different waves because I hear that with the right frequency you can make the colloidal silver stronger, without pumping up the current. So I need help since I'm a noob in electronics.

Chris

 

I thought I had answered this already. Is this a duplicate thread or did my post somehow get deleted?

Anyway, I was also suggesting you get an old (i.e. free) audio amp (as mentioned above in #3) and feed it whatever wave signals you want from a smartphone app or from an old PC, which are also free at recycling centers.

This will give you the entire audible range of frequencies, amplified to peak voltages up to and beyond what you mentioned in #1.

I'd be skeptical of a lot of information you may have read about colloidal silver. The potential for harm is very high, and thus may even be a topic that violates the Terms of Service here.

 

I'm making colloidal silver, electrolysis of two silver wires in distilled water. You don't want your current to run away too high as when the colloidal silver becomes stronger, the more conductive the water is. The higher the current creates larger particles which makes the colloidal silver's bio-availability lower. So I'm trying to figure out how to incorporate different waves because I hear that with the right frequency you can make the colloidal silver stronger, without pumping up the current. So I need help since I'm a noob in electronics.

Chris

Correct me if I'm wrong, but I think what you may be looking for is a circuit that reverses the polarity to the silver bars or wires (whichever you are using) and a way to set the current at low levels (1 to 10ma). I'm not sure you will find this off the shelf, but let me think about it.

 

Almost any standard bipolar opamp (such as the *fabulous* LM741) can supply 1-10 mA at 38 V when powered by 44 V.

I hear that with the right frequency you can make the colloidal silver stronger, without pumping up the current.

Where did you hear this and what did they say? What is "the right frequency"? A sine wave has zero harmonic content, while the other waveforms you mention have different, (theoretically) infinite harmonic spectra. What bandwidth do you need? Circuit design requires specific parameters, and so far you have not provided much.

ak

 

Wayneh your a genius! I understand what you mean now. I don't have an audio amplifier and since I live in the middle of nowhere, recycling centers don't exist. This seems like a decent cheap one for my use on ebay http://www.ebay.com/itm/191992024371? Let me know if this board will work. I can hook up an an old iphone and use a signal generator app to supply the waves. I have another question, between the output of the sound amplifier and the silver wire, I will need something to limit the amperage to a certain point. for example as the colloidal silver gets stronger, the water conductivity increases and the amperage will runaway high up. I need something to limit the amperage up to 5ma. Also I would like experiment with 7ma and 10ma, thanks.

Ron I am not using polarity reversing. AnalogKid, I have little to no experience in electrics, please forgive me of my ignorance.

 

Hello,

The shown amplifier has a maximum powersupply of 15 Volts.
It is likely a bridged amplifier that has two outputs that are inversed of each other to get the output power.
So when one output goes up, the other goes down.
There will be polarity reversion with this amplifier.

Bertus

 

By definition, all audio is "polarity reversion". Also, that is a bridged high frequency switching amplifier with no output coupling capacitors. In other words, it is quite different, electrically, from whatever information the "reading" was based on.

ak

 

A constant current supply at 10mA or less could be done without much of an amplifier. You could still use the tone generator of a smartphone headphone output but instead of an audio amp, you could get 10mA from a single op-amp circuit. A simple, low power audio amp.

The maximum current will be limited by the voltage available at the supply, and whether that voltage can drive the current you need into your wires. And the op-amp you choose must be rated up to that voltage. We don’t know what that voltage is except for the numbers in your opening post.

The op-amp will be configured to watch two voltages - the incoming tone and voltage across your load and possibly a shunt resistor in series with it. That voltage will be proportional to the current in your wires. The op-amp will adjust its output current to keep those two voltages equal, giving you a reproduction of the signal wave in the silver wires. You’ll be able to turn down the ‘volume’, the current, to whatever you want.

It’s hard to follow words without a picture. Look up “op amp headphone amplifier” circuits and you’ll see examples. If you really need 20V or more, ignore the low voltage examples except for their general layout.

 

I'm no expert on making colloidal silver, but I think the idea is to use constant current so as more silver goes into solution the current doesn't go up and make larger particles. Constant current and waveforms make this difficult.
For example lets say you have a 1 to 20 volt sine wave and the resistance of the solution is 2000 ohms you would have 10 ma peak and 0.5 ma in the valley. So now the question comes up. What do you want to have happen when the resistance goes down to 1000 ohms? Do you want to just cut the top off the sine wave or do you want it to change to 1 to 10 volts?
Almost anything is possible, but some are more difficult than others.