04-08-2015, 06:52 PM
I have been away for a few days but I am back again now.
Here is what I would use for the high voltage regulator with a couple of mains chopper FETs from an old computer power supply.
The three diodes and the 1K resistor set the short circuit currant and some experiments will have to be done with the value and the number of diodes or perhaps a zena diode could be used in order to get a limit that will not kill the transformer. I have left out the decoupling capacitors on the input and output for clarity.
The short circuit currant can be tested in a lower voltage circuit perhaps 24 volts or so.
Those FETs have massive gain and most of it is in negative feedback for good regulation.
It will just keep the high end of the pot at about 12 volts in the sampling circuit.
Here is what I would use for the high voltage regulator with a couple of mains chopper FETs from an old computer power supply.
The three diodes and the 1K resistor set the short circuit currant and some experiments will have to be done with the value and the number of diodes or perhaps a zena diode could be used in order to get a limit that will not kill the transformer. I have left out the decoupling capacitors on the input and output for clarity.
The short circuit currant can be tested in a lower voltage circuit perhaps 24 volts or so.
Those FETs have massive gain and most of it is in negative feedback for good regulation.
It will just keep the high end of the pot at about 12 volts in the sampling circuit.
