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The new 2017 model renders all previous colloidal silver/ionic silver makers produced by myself obsolete.
Pressing the black button prior to placing the electrodes in the water will change the program, the selection is automatically placed in non-volatile memory; the advantage of this is that the next time the unit is plugged in it will be ready to run the same program, simply place the electrodes in distilled water.
Note: The unit is powered from a standard USB port, a laptop computer in this case. USB ports are a safe 5 volts. The electrodes are galvanically isolated from the USB port, power consumption is less than 1 watt (<200mA @ 5V).
Using a cheap USB coffee cup warmer as a thermal stirrer, if this type of device is used <= 2.5 watts is recommended.
About the device:
It has been found many of the cheap imported plug-packs and power supplies have less than adequate insulation between the 240VAC mains and the low voltage output; we have had at least one death in Australia from such a device.
My personal dilemma was that I have no control over the power supply; the solution was to redesign the product incorporating 1500 or 3000 volts of galvanic insulation between the DC input and the electrodes that are immersed in water.
Features are listed below:
- 5 volt USB powered.
- 1500 volts of galvanic isolation.
- Poly-switched input protection.
- Single IP rated switch enables program selection.
- A smaller better looking polycarbonate box.
- Compact plugs on the silver electrodes.
- The wire to the USB plug exits at the bottom of the device, this makes it sit on the top of a glass in a more stable manner. No socket was fitted as it is a potential water entry point.
- The last selected program is held in non-volatile memory so at the next boot up your favourite selection is ready to go.
- Internal 5 volt to 24VDC converter to drive the current (<= 1mA) through purified water.
- This device determines the coulombs of charge regardless of water conductivity.
Faradays Law
The law states that 96500 coulombs will at 100% efficiency deposit or strip 1 gram equivalent weight of a metal. Silver with a valence 1, has a molecular weight of 107.87, which also is its equivalent weight; 96500 coulombs will deposit or strip 107.87 grams of silver.
96500/107.87 = 894.59 coulombs per gram or 0.8947 coulombs per milligram of silver (1.1178 milligrams of silver per coulomb).
The colloidal/ionic silver generator uses Faraday’s law to calculate the silver removed from the anode, a small amount of the silver will settle to the bottom of the container and some will deposit on the negative cathode, for this reason the liquid crystal displays <= . Try a google search on using a TDS meter to measure colloidal silver, the results will show how unreliable the method is.
Starting with distilled water and using coulombs of charge seems to produce repeatable results.
About the water:
Distilled and deionized water are not the same, do a google search. Distilled water seems to give good results not supermarket purchased distilled water made by the deionization process? BTW it beats me how water is sold as distilled if it is not distilled.
Claims:
No claims are made about the uses of the water treated using this device.
About the Silver:
Certified 99.99% pure is used. Higher purity silver is available for those that can afford it. One would be foolhardy to use silver at < 99.99% purity.
Some Specifications:
Input voltage: 5V (USB powered, internal galvanic isolation )
Input current: <200mA
Input protection: 500mA poly-switch in series with the input feeding a 5W 5.6V Zener across the supply
Output protection: 600W TVS diodes to the ground plane
Calibration accuracy: +/- 4%
Silver electrodes: 3 mm diameter, ~130mm submerged in water
Maximum electrode current: ~1mA
Maximum electrode voltage: 24V
Max electrode current density: 0.0816 mA/cm^2: 0.526 mA/inch^2
The silver normally employed has a purity of 99.00%. The plug in connectors are soldered in using lead free solder; the typical composition of the solder is Sn99%, Cu0.7% although it is meant to be nontoxic the water level should never touch the soldered connection.
Note: Screw in type connectors were found to work loose after extended usage.
This image shows the maximum water level with respect to the connectors; one inch (25mm) from the top of the glass is a good water level.
The image to the right shows the PCB, the input isolation DC-DC converter is visible in the top image.
Note: a 18Fxxx chip is fitted with a 10 bit ADC, the PCB will accommodate a 12 bit ADC PIC, 3 or 5V.
Toffee, ex RSPCA, quality control dog, 10 years experience.
Disclaimer
Although I will endeavour to keep all information accurate mistakes will be made. No claims of safety are made and all use of this information is at the risk of the user.
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