Well, here is the instructable you have been waiting for!
The device we are going to use to make a power supply for the Marx Generator is called Cockroft-Walton Voltage Multiplier, now that is a lot of words, so what most other people call it is what we are going to call it, the Voltage Multiplier.
This one is a different design from the one I used for my Marx Generator, I was going to post the other design, however, it was quite difficult to build, so I came up with this new design.
The new design has more advantaged over the old design, I will explain them:
- Easy to build
- More efficient
Disclaimer: This project is very dangerous to operate, it generates high voltages (6000 volts). Please do not attempt to build this voltage multiplier unless you are familiar with high voltage. I am NOT responsible what ever happens to you and others with this voltage multiplier.
Step 1: Get the Things!!
If your country uses 110v or 120v, get the things as listed:
- 34 1N4007 diodes
- 34 100nF film 200v (or greater) capacitors
- 100mA fuse
- 18 1N4007 diodes
- 18 100nF film 400v (or greater) capacitors
- 100mA fuse
I got the diodes and the fuse from Farnell. I got the capacitors from Maplin, however, the capacitors are no longer stocked at Maplin, But you can still get it from Farnell. Here is a list of things you will need to get if you are going to buy the components from Farnell.
100nF film 400v capacitor
100nF film 200v capacitor
Step 2: Schematics
Here are the schematics, it is really easy to make, however, you need to make 34 stages of capacitors and diodes if you live in 110v or 120v area, or 18 stages for 220v or 240v area, NOT 6 stages like you see in the schematic, I cannot add more stages to the schematic, sorry...
The schematic also includes the recommend value of the safety resistors, you don't have to add those resistors, it just makes everything safer.
Step 3: Start Making the Multiplier!
I don't know how I can explain how to make this, but I will try my best.
First, glue the capacitors together to make solder a whole lot easier, Or you can use a vise if you have one, that will also help you to get the job done faster.
As you can see in the picture, I glued seven capacitors together, and I am going to glue some more on when I solder seven diodes on the multiplier. Doing so makes your job easier...
Step 4: Solder on the Diodes...
Then start soldering on the diodes onto the capacitors like you see in the schematic. And trim off the excess leads as you go along.
Also, make sure you make nice, shiny, and round(ish) solder joints to avoid corona discharge which can cause a lot of problems to your voltage multiplier.
Step 5: Completed, and Check Your Connections...
- Are all the diodes facing in one direction? If not, change the polarity of the diode.
- Are all the solder joints shiny and round(ish)? If not, fix that.
Step 6: And the Final Connections
And finally, solder on the fuse, (safety resistor,) and the wires. It might be a good idea to cover all of that in hot glue, to prevent the wires breaking and causing a huge problem.
Step 7: Completed!
Also, it is high recommended you to put this whole voltage multiplier in a project box and fill it with molten paraffin (candle wax). You can easily buy paraffin from most hobby stores.
The reasons for doing this are:
- Protects you and others from high voltage electrical shock. (That is the main reason.)
- Prevents corona discharge
- And of course, it make everything look better and safer!
Step 8: Sparks and Stuff
Best luck to you for making a Marx Generator and the high voltage power supply!
You don't have to use the voltage multiplier just only for the Marx Generator, you can use it as a high voltage power supply for some thing else, like kirlian photography, static motor, and stuff like that. Or you can use it just for fun like make sparks jump between the ends of the wires, and impress your friends with it too! Like I did below on the pictures! :-)
If you want more voltage from the voltage multiplier, just simply add more stages of capacitors and diodes! Each stage will add on another 120v or 240v to the voltage multiplier.
Well, I hoped you enjoyed this instructable!
If you have any questions, or need help, or found an error, or anything, make a comment! I like comments! :)
namindu made it!