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Colloidal Silver Production / Aloe reduced/capped AgNP 20ppm
« Last post by Familyman on November 14, 2019, 06:44:38 PM »
Hi Forum members... I have been reading, and reading, and reading this site for the past couple of weeks in an effort to avoid asking silly questions and wasting anyone's time... I hope !

I am currently attempting to replicate FlyingDutchman's aloe capped 20ppm AgNP for topical use... primarily on fungus.

Having studied FD's video, my question relates to the quantity of aloe powder used
(I am using 200x organic aloe powder).

Is the 10mg used for 500ml crucial, or can a more be added to create 1x Aloe vera leaf juice infused w/ AgNP and accelerate the reduction ?
( in my case, the dilution for 1x Aloe vera leaf juice is 1:199 )

I am currently 90 minutes into the reduction at 90ºC with 1g of 200x aloe powder ( dissolved in DW ) in 250ml of 20ppm IS ( made with electrolyte ) and the color is light yellow...still.

Will it fully reduce under these conditions...? Well, 2hrs at 90ºC and it remained very light yellow.

Any input/advice is greatly appreciated. Many thanks !
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Colloidal Gold Production / Re: Method to raising PH
« Last post by muhendisane on November 12, 2019, 05:03:51 AM »
By you mention 'hurt' what do you particularly mean? What kind of hurt is this?

And is there any method to use without 'hurt'?
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Colloidal Gold Production / Re: Method to raising PH
« Last post by SaltyCornflakes on November 11, 2019, 05:07:43 PM »
Such high ppm will increase salt concentration, which eventually hurts the colloid. But try it and report back.
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Colloidal Gold Production / Re: Method to raising PH
« Last post by muhendisane on November 11, 2019, 06:53:33 AM »
Any thoughts on this?

I'm planning to do high ppm cg by boiling the cg and let the water out of the solution and make the concentrated. And by doing that for ex. when the 1000ml 40ppm cg boiled down to 500ml, it becomes 80ppm 500ml cg solution, is that right?

So in this way if i boiled down 1000ml 40ppm cg down to 100ml, it becomes 100ml 400ppm cg? is that calculation right and is there anything to do and be aware of?

And if there is a another way to make very high ppm cg, i'll be pleased to know. Thanks

muhendisane
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Questions and Comments about Articles / Re: Question about calculations and maltodextrin
« Last post by Mjock3 on November 02, 2019, 10:12:09 PM »
Thanks to both of you for all the info on this thread.  :)
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Colloidal Silver Production / Re: Taking Proper Current Reading
« Last post by Gene on October 21, 2019, 07:47:03 PM »
Lets stay on topic, shall we?

You need to read the datasheet more carefully - go look at the example of how to wire up an LM317 in current limiter mode because you obviously have no clue how to do this given you seem not to understand the current limiter topology for an LM317.

You can ONLY get 1.5 amps to flow in a current limiter configuration using the LM317 if you change the current setting resistor to about 0.8333Ohms. No one is going to even come close to this because the operating range we're interested in is between 2-3ma and maybe 25ma.

I NEVER said to ground the regulator output. That would just be plain dumb. I said to hook the meter across the current limiter (meaning current limiter output to ground). They're not even close to the same thing.

Thermal limit discussion is not on topic? I think you need to pay more attention to whats written and remember better what you wrote. YOU were the one who brought it up, not me!

With 20ma flowing through the regulator in current limit configuration, even if you put 30V into it and grounded the output, worst case, the regulator would dissipate 0.575 watts.  Once its in circuit with the cell set to 10V, that power dissipation drops to 0.375 watts. Thermal limit? NEVER!

As long as the load voltage stays below Vin-4.25V and the output current is greater than or equal to 10ma the current limiter will limit properly to the current its set to. And yes, all the way up from 0V (ground). If it doesn't its either not a current limiter or if it is, its broken. You may be able to limit to less than 10ma but this will vary from LM317 to LM317 given process spread though its not guaranteed.

Checking the current or setting it using just an ammeter across the limiter to ground works flawlessly and given what I said above, it matters little whether you do it this way or check it in circuit.

Its MUCH easier to set the current on the bench if its adjustable and a good practice to check the set current before you hook it up in circuit either way. Its also good practice to check the current once you do have it in circuit because if you're meeting the operating requirements of the limiter and its not limiting to what you set it to, the limiter is broken.

An LM317 makes a poor current limiter? I guess you didn't read the data sheet well enough. The LM317 was designed specifically to function wonderfully in both voltage regulator AND current limiter configurations. As long as you stay within the operating limits (IOut >= 10ma, load voltage < Vin-4.25v and keep the regulator below the acceptable power limit), its a wonderful current limiter.  I have no clue why you think otherwise.

If you don't like the operating requirements, you can go do your own homework and find another adjustable regulator to use that suits you better but thats getting harder and harder to do these days if you want one in a TO220 package. Most everything these days is surface mount.

The LM317 is readily available and has been since maybe the 1980's (yes, still in production today), its cheap, its a beast and it just plain works.

ALL current limiters are voltage regulators. The difference is that in current limiter topology, the voltage regulator regulates its output voltage so the voltage ACROSS the current sense element (resistor or potentiometer) is always equal to the voltage reference (1.25V in the case of the LM317), NOT between the regulator output and ground! Given this, picking the sense resistor value to get a particular fixed current is simply Ohms law.

Even the 2 transistor limiter is a voltage regulator. It limits current by always maintaining about 0.65V (base emitter junction voltage of the bipolar sense/control transistor) between the current sense resistor and ground (a.k.a across it) being this circuit is a current sink rather than source. Its not a very good current limiter because the base-emitter junction of the control transistor drifts in voltage a little over temperature and current through it.  An LM317 limiter is rock solid because the internal reference of the LM317 is a bandgap reference thats very temperature and voltage stable.
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Colloidal Gold Production / Re: Gold electrode weight test & results
« Last post by cfnisbet on October 20, 2019, 07:58:37 PM »
The general case is that you run the maximum voltage available from the PSU. Turn off any Constant Current setting.
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Colloidal Gold Production / Re: 1st attempt
« Last post by Neofizz on October 19, 2019, 04:17:19 PM »
I think (no proof) that the gelatin does not care how many atoms a colloidal particle has built up to and will surround it, and prevent it from combining with others to get to the size that produces the ruby red. More boiling will loosen the grip that the gelatin has and allow more gold atoms to combine.

I get a similar effect when making the 320 ppm gel-capped colloidal silver. It can take up to an hour for the colour to start showing. Other experiments where the reducer was added at the beginning and no gelatin resulted in colour showing in just a few minutes.
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Colloidal Silver Production / Re: Taking Proper Current Reading
« Last post by Argentum on October 19, 2019, 04:12:15 PM »
  Gene is right.  The easy way to think about it:

It depends upon how you look at it. In this thread I pointed out areas where Gene is wrong. If you go through other threads that I started he also made incorrect statements.  Basically challenging what I had posted.

As for the current regulator testing, why test at a boundary condition that has nothing to do with it intended application?

I could go on but won't...

Argentum
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Colloidal Gold Production / Re: 1st attempt
« Last post by Bobby on October 19, 2019, 03:18:03 PM »
  I guess since the gold particles had not been karo reduced yet, the gelatin was just hanging around in the mixture with nothing to cap??  No reduction = no capping?

Bobby
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