My guess is that this is not your original research. Can you post links to the references you are using.There is an experiment in which cancer cells (in vitro)were treated with 1.5V to 3 V DC power supply with 3mA current. at higher current more than 20mA electrolysis takes place but at low current only enzyme -ribonucleotide reductase is inhibited and cell dies without producing toxicity. Hence 1.5V to 3 V DC power supply with 3mA current is required.
JFETs make good current limiters if you connect the gate & source together, but they have pretty loose parameter spreads. Better predictability can be had by selecting a part with higher Idss and putting a volt-drop resistor in the source lead, with the gate connected to the bottom of the resistor a negative WRT source gate voltage causes limiting at lower than the stated Idss.You cannot generally specify both voltage AND current, as this leave no degrees of freedom. In response to an applied voltage, a load will draw the current it does, as dictated by a number of internal factors; conductivity, cross sectional area and so on. You can instead control the current by varying the voltage, raising or lowering the voltage to get the required current. Only in a very narrow set of conditions will you have your 3mA driven into the load within the voltage range you cite. You would need to reproduce the cited conditions, and this means you'll need similar electrodes, distance between electrodes, and so on.
I guess he is looking for a power supply with 3V output and 3mA limit.
Mayur, could you post a link to the paper with the explicit requiriments? Not an abstract please.
Your simplest solution is a 3V button cell or two 1.5V cells in series with a 1kΩ resistor.
Unfortunately, what you are asking is not possible.Considering a variable voltage say 0 to 3V how to design circuit? I mean can you give me the diagram if the resistance of the liquid is considered zero.
I have been reading this interesting debate and I reckon the answer is a PSU with a method of setting both the current and the voltage.
Such circuits can be found in many of the "Voltage Regulator" books, which an LM317 is set up to control current and another straight after to determine the output voltage.
Given suitable and accurate metering, the device could be set up for all the supplies suggested in the paper by Kulsh.
Search for Rife and Crane - the web is flooded with info on "magic" frequency combinations for every imaginable illness.I helped repair a local chiropractor's "cancer cure machine" many years ago.
It not only used specific levels to kill cells, it used certain frequency combinations to target cell types.
He was a big believer.
In spite of the machine he lost relatives to cancer. It's sad, but I don't think anyone was hurt.
Op admits to having no knowledge of electrical theory.Whats most rediculos is why OP wants a 250 volts mains.
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by Duane Benson
by Jake Hertz
by Aaron Carman