QuoteComparing the two circuits is not possible. The Nexus circuit uses the motor ignition and timing as it is.
You just add parts to get the plasma flame at the sparkplugs. Greg's circuit uses reed relays and must
be timed by using magnets on the motor flywheel. It is a more complex circuit and is not for the beginner
if you ask me.

Nexus is the suitable circuit to go.Let the engine control the timing messing with it and changing stuff is not easy....

@happyvalley808
I live in Vietnam. We can only buy some common electronics components from China at local shops. Some of them work unrealiably. Even they don't have datasheet.
Sorry some guys come from China. That's just my feel.

@bxngoc,

Data sheets for components can be downloaded for free from the Internet.

If you create a PayPal account then you can buy all the parts you want from the net.

If you have access to a garbage dump for electronic then you can harvest diodes
and other stuff from discharged electronic equipments for free.

Groundloop.

@Groundloop
Thank you for your advice. I always harvest components from old computers. I make online order too but shipping cost from 50 to 100 USD is expensive for me if just buy some diodes.

UPDATED NEXUS PLASMA ARC CIRCUIT

@Everyone,

  I have updated Bill's Nexus circuit and received his blessing. 

He stated that he is using a 2,500 watt Cobra inverter but is only drawing 100ma so a large inverter is not necessary. 

He also stated that the capacitor that he is using is from a very old and heavy microwave oven and he has not tried a more modern cap to see if it would work, but he will when he returns from vacation.

I am also planning on testing a modern MOC (.95uf 2000vac) and will publish my findings.  I'm just waiting on my diodes from Mouser.

Good Luck to everyone and thanks to Goldenequity and Groundloop for their assistance in this matter 

Lapperll