tdwister

To measure HV you can buy a HV probe, or I make a voltage divider, then read the v drop across, the or a resistor, use the formula E ' ------------- I x R It seems to me, you should probally do a lot of reading, I do not know how much info is on this site, but if it is not here you can find it with google. this is very dangerous stuff. If you have a nitrogen laser, it probally has some big caps in it, they will hold a charge for quite a while, if you grab a lead, evem when it is disconnected from power you can get it good. (sometimes much more power in a cap than the source that charged it) be carefull. Read Read Read.

I think a IRF460 is what worked best for me, it is overkill. with this board using a 7812, you wioo only have 12 volts to play, with that I had to wind my own primary. You can use a bunch of diffrent values, from what I have read 15k to 20khz works best, but I have not played too much with the frequency. these values will work, in r1 use near 47k, in r2 use around 22k, and for the pot use 5k or 10k for a cap use .001uf . or use the formula in the drawing here is an example say the pot is set to 0 ohms 47000 + (2x22000) x 0.000000001C = 0.000091 then take 1.44/0.000091= 15824Hz I do not know about Jacobs ladders Be very carefull with this stuff

You have it, I did not use the orange and white wires, but they may be taps off the secondary winding. also the HV ground or return, it is one of the cut pins I marked. I got much better results winding my own primary winding, I wound 4 or 5 turns of 16 gauge magnet wire around the ferrite, and used that as my primary, I got about 35kv out of the secondary. with a pulsed 12 volts on the hand wound primary. I am sure you can get close to 50kv out of it but it will require more than 12 volts on the primary that is inside the flyback. the board that they are selling, to me looks like it has a spot for a 12 volt reg. the max rating for the 555 vcc is 15 volts, so I do not see how they are getting 50kv with that flyback and board. In my opnion, anyway.

Hello, I too got a couple of these flybacks.they are not great as far as I can tell. I have tried to get a pin out from them with no luck, (you got these on ebay, right from K&plans) I found the return for the secondary (the big red wires other side or ground for the HV) unfortunately it is one of the cut pins. The 2 pins that are next to each other are the primary winding