Alternative Science & Technology Research Organisation
August 2003  Newsletter


Bridge circuit

This circuit is a combined full wave rectifier and voltage doubler. I discovered this circuit while experimenting with florescent tube drive circuits, it is probably is an old idea but it works well. The circuit will reduce turbine cut in speed by about 50% providing a small current at low speed but charging at normal speeds is not reduced but actually improved over the standard bridge rectifier arrangement. In consistent light wind conditions a significant amount of extra energy could be collected per day.
At low speed the circuit comprising D1, D2 and CI, C2 functions as a voltage doubler to gain enough voltage for charging, at speeds above the normal turbine cut in speed diodes D3, D4 switch in and with D 1, D2 function as a full wave rectifier. In full charging mode the capacitors still assist current production by allowing a larger portion of the turbine produced sine wave to be utilized. This circuit can also be useful as a battery charger booster but take care not to overheat the charger by exceeding its current ratings. The value of capacitance to use is a matter of experimentation for each application but 1000 uF is a easy starting point, the caps must have a large voltage safety margin and operate within ripple current specs or they may overheat and fail. Many wind generators have 3 phase windings , in this case 3 identical rectifier units will be required and the windings will need to be separately connected to each rectifier unit. The switch for each rectifier unit is optional and only included so you can check the difference.
Randal L.


The meeting began at 8.10pm with Robert beginning proceedings by welcoming everyone along. Eventually 26 people were in attendance which was quite a good number considering the weather.

Ken gave the first demonstration of the night using a microwave oven transformer that had the E and I laminations separated with the help of an angle grinder. He said that he has used this as a variac, varying the voltage by adjusting the amount the I laminations cover the E laminations. Ken gave a demonstration, with the aid of Peter, of how little power is needed to create a significant magnetic field by connecting a AAA battery (1.5 volts or less) across the winding of the transformer. Peter could not separate the two sets of laminations, in fact he  lifted  the transformer off the table by holding onto the I laminations. Ken mentioned that you should always use a diode across the coil to kill any back EMF when the battery is disconnected before it kills you! 

Ken also brought along a car alternator that he has modified by removing the voltage regulator and bringing out the wiring for each phase as well as the field windings. A power supply was connected to the field windings and a 12 volt lamp connected to the output. On turning the alternator by hand, the lamp would light quite brightly, demonstrating that a car alternator can generate power at low speeds if connected up correctly. Ken also demonstrated that it was harder to turn under load which depended on how much voltage was fed to the field coils, thus if being used on a wind generator for example, the output load can be adjusted externally by varying this voltage. This could automatically be done using a PIC controller to get maximum output under any wind conditions.  

We were then treated to a talk on electrochemical etching and pulse jet motors, both of which are subjects that Ken has an interest in. Ken etches petal valves made from steel for pulse jet engines, the basic process being, take a clean steel sheet, paint both sides with enamel paint, scribe the shape required removing the paint, then place in a bath of saline solution. (1 tablespoon salt / 1 litre of water) Finally an electric current is applied (20 volts @ 2amps) with the positive connected to the item to be etched and the negative connected to a stainless steel scourer pad laying in the bottom of the saline bath. This is left for 10 minutes up to an hour until the etching is complete. 

I brought along a batteryless torch that I have constructed. Shaking the torch causes a rare earth magnet to pass through two coils which charges a super capacitor. A switch then allows the capacitor to discharge into a high brightness LED. On average about 30 seconds of shaking gives about 15 minutes of bright light. I have discharged it once to a level of light that was really dim and this took about 2 hours. I hope to write an article for the next newsletter with the technical details for anyone who wants to build one along with suggested improvements to get more light for less shaking. I also talked briefly on the new Hope Valley hydroelectricity generator being installed by SA Water, recovering energy from water already flowing in pipelines from Ansteys Hill. 

While the next speaker was getting prepared, Ken mentioned that Jim was coming back to Adelaide and was interested in doing more experimenting while he was here. A conversation also ensued about adding metho to petrol (max 15:1 ratio) which apparently gives a cleaner exhaust. Andrew then demonstrated an experimental "Life Energy Meter", available from the US for US$299 which he said that while testing water he found that the energy level had reduced by half.  

George then spoke about welding spatter and a device that is spun by the welding gas  and creates an oil mist which stops the spatter from sticking to the job. A vortex spin atomises the oil so George suggested that this same process could maybe be used for petrol.  

Ron was next and as usual came up with some interesting things, beginning with glasses with blue LEDs fitted to them. He made these after hearing that exposure to blue light for two hours per day helps you sleep. He also mentioned that he has converted all the audio tapes onto MP3 format - thanks to Ron for all the hours he has spent doing this. Finally, Ron displayed a solar collector that he had recently bought. It has a very large surface area, with a hole at one end and an 85 watt  fan at the other so that the air which passes through the unit can be blown into a room via ducting to heat it. George added that this type of solar heating can be incorporated into the structure of a house and used to heat a low temperature phase change material which is then used as thermal storage. 

Dino was next and continued talking on the subject of solar room heating. He explained how he had designed a system of heating similar to those described above which also became the roof structure. Rather than heating air, the heat collector contained pipes for heating water which was then pumped to a tank underneath the floor of the house. The heat from the water in the tank would then radiate through the floor into the room. Dino had been also been shopping and brought along his new does everything tiny digital camera. He also demonstrated Vic's ghost receiver being used as a sensitive radio receiver, listening for electromagnetic fields being emitted from powerlines, new cars, railway lines and mobile phones. 

A couple of surprise visitors were the next speakers, Peter and David, who brought along their electric assisted bicycles. I think everyone was impressed by the ingenuity and workmanship in both cycles along with the stories of their construction and use. Peter also demonstrated a 5 watt LED that he uses for the headlamp on his bike which cost $76, has a life of 100,000 hours and is not affected by vibration. David has built his own electric motor (controlled by a PIC) for his bike and brought another motor for display. This motor was 500 watts and is approximately 85% efficient.

Robert demonstrated his gravity wheel experiment and like others we have seen it "almost" works.

Finally Randal gave a demonstration of his voltage doubler circuit along with a good description of how it works. He suggested that this circuit could be used to boost the output of a wind generator  so that useful power could be obtained at lower wind speeds.
The meeting ended at 11.05pm followed by lots of talking, drinking and eating as usual.........Bruce

The information on solar water heating is from.

The Solar Boiler is environmentally-friendly. It does not pollute or use valuable non-renewable resources. Even the pump to transport heat from the collectors to the storage tank is powered by the sun. Solar energy is a sound investment in everyone's future, today.
The Solar Boiler is designed for automatic daily and year round operation. A non-toxic glycol solution in the solar collectors eliminates winter freezing problems. A photovoltaic module regulates the proper daily operation of the Solar Boiler and the solar loop circulator turns on only when the panels are hot enough to heat the solar tank.

As one of Thermo Dynamics' new generation of solar products, the Solar Boiler makes solar energy economically available to your family's needs. It's an investment in reliable performance.
You have our name on it!


The Enviro-Gen 12 Saltwater Generator: An Ideal Power Source for Boaters, Campers, etc .

What is it??

The simplest answer would be that this is a wet-cell battery that uses seawater instead of acid. This answer is technically incorrect, however, since a battery merely stores electrical energy put into it via a battery charger. The Enviro-Gen® generates its own electricity once the seawater is added and a load is placed on the unit. That's right, if there's nothing plugged in and operating, there is no voltage produced and no depletion, so this isn't a 'one-time shot'. You can use the Enviro-Gen for several hours, then dump out the water and rinse the anodes in fresh water and put it back on the shelf. Oh, the Enviro-Gen also has an indefinite shelf life and, unlike batteries, is unaffected by hot weather or engine room conditions.

What are some typical uses?

Anything you'd normally use battery power to operate can be operated by the Enviro-Gen. You can, for instance, operate a CD Player (9V), lighting (1.5-12V), a radio (6V), navigation gear (12V), and other items simultaneously using 'universal' converters. The duration of operation is dependent upon the electrical load placed upon the unit. With a minimal load a set of anodes will last up to 100 hours, with the unit rated at 40AmpereHours. A 5 Amp sump pump, for instance, could deplete the anodes in 8 hours if running full time.

Primary uses include:

Main source of DC power for sailboats without generators, for lights, navigation, and communications.
As a back-up source of power for boating, camping, hunting, or emergencies.
As a light-weight, small footprint alternative to wet-cell batteries.
For use in life-rafts and emergency shelters.

The Enviro-Gen 12 Saltwater Generator: An Ideal Power Source for Boaters, Campers, etc .

What are some of the advantages over traditional wet-cell batteries?

Weight --- The Enviro-Gen weighs under 3.5 pounds without water, at least 90% less than most wet-cells.
Size --- The Enviro-Gen is a tidy 5 1/2" X 9 1/2" unit which will fit virtually anywhere.
Flexibility --- Ever wanted to use a battery only to find it DEAD? We all have. Normally you'd need access to both a battery charger and an AC power outlet. With the Enviro-Gen, so long as you have water and salt available, you can have DC power. You can also hook several of these units together to accomodate heavier loads, longer duration, or both.
Shelf-Life --- Years! You can put an Enviro-Gen in your boat, life raft, or emergency shelter and leave it for years, secure in the knowledge that it will work when needed, assuming you've kept it free of saltwater (the anodes come packed in a waterproof case to assist in this).
Environmental Concerns --- There's a good reason for this unit's name, it's not only GREEN in color, it's GREEN in operation. The only thing produced by the anodes' depletion is a harmless magnesium-salt which can be safely poured back into the ocean or even back into a city's water supply! Also, since the anodes are all that need replacing, there's not a lot of battery cases to put into land-fills.
Cost --- The Enviro-Gen is now available at an introductory price to get units out there in use and spread 'the word'. Once these first 1,000 units are sold, the price will go back to where our marketing folks tell us it should be. Suffice it to say that, at a mere $99.95 for the unit and two sets of anodes, it is a bargain. Our government/military sales department have cited a much higher price for these units built to mil-spec, and that competition alone should drive the price up soon, so act today!
Safety --- Imagine you're out to sea, doing a little tweaking on your batteries. Suddently the boat takes an awkward roll or shudder and the battery overturns. Now you have a caustic acid spill to clean up, as well as the potential for getting acid on your clothes, skin, and (worse yet!) in your eyes! WIth the Enviro-Gen you'd just have a little saltwater to clean up, no potential for harm to your clothing or your body.

So, how do I get one?

It's Simple! You can order online via our secure server (VeriSign Security) by clicking on the button below, order by phone or Fax by calling toll-free 877-427-0220, or sending your check for $99.95* US plus $7.50 shipping to:
1236 Ginger Crescent
Virginia Beach, VA 23456


The meeting was started at 8:13 by Robert, who introduced Robert Warne as the guest speaker for the night.

With visual aids, Robert Warne described the founder of Grundfos Pumps, Poul Due Jansen (1912-1977) and his quest for the most efficient and advanced pumps in the world. Grundfos (meaning ground-water) invests or the initial cost of the pump itself, 10% service costs over its life and 85% running cost over its life cycle.

Robert added that Grundfos spent a lot of money and effort in the design of pumps and controls to reduce this huge running cost by factors up to 50%. He said that new titanium pumps were replacing the 316 stainless steel pumps and even though they were twice as dear, the efficiencies far out weighed the additional cost over the pump's life cycle. The fastest pumps ran up to 24,000rpm at 400 Hz, utilizing onboard micro frequency controllers with a host of sensors to protect and regulate them to optimum efficiency.

There is a wide range of Grundfos pumps available for all types of needs. There is centrifugal, radial impeller, mixed flow (or semi axial), solar, submersible and a host of other types. They run from 30 volts to 300 volts  DC and 90 volts to 260 volts AC, which makes them very versatile. For more information, please look up the Grunfoss internet site at

Robert N thanked the Guest Speaker for his excellent presentation and then opened the general meeting.

Peter...started the ball rolling with an article from the local newspaper stating that the "Mars Bars” recipe was to be changed so as to exclude the presence of hydrogenated oils, as they are now considered a health risk.

RobertN...gave a short talk about a video on the Beck protocol and how to use Beck devices properly. More information is available at

Jan...stated that Robert had agreed to be a partner with him in the manufacture of the "Gravity Wheel". Jan also gave a fascinating demonstration of a device that climbed up and down a piece of plastic water pipe as it was  rolled either clockwise or anti-clockwise.

Dino...said that he had been talking to Davershon about Bi-Field Meters. There are four different types and one of the types could detect the presence of humans through walls. Dino also demonstrateda new type of  very high definition and intensity video projector. He had just received it from the USA. It was an1840 HDTV with a contrast ratio of 2000:1. Instead of the normal LEDs it used a myriad of tiny flip up mirrors that projected each pixel from a very high intensity source. The picture quality was startling and the blackrendition unbelievable. He projected rain forest images across the ceiling and down the back wall (about 40 meters away) with incredible effects, even in quite bright lighting conditions. See for more information.

Ken...gave a short talk on a document that he had found on the internet listing dozens of free energy devices and projects that had all seemingly turned out to be either duds or scams. The list went back for decades.

Robert concluded the meeting, stating that the next meeting was to be a practical experimenter's one.




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