Step Up Pre Coil/Transformer

[Bret Cahill]

OK Honda no longer makes the original ignition coil that steps up the
voltage by 3 -4 orders of magnitude.

What's the easiest way to get a 40,000 volt spark out of a 12 volt ac
system with a 100X step up coil?


Bret Cahill

 

[Jasen Betts]

On 2012-05-19, Bret Cahill <BretCahill@peoplepc.com> wrote:

OK Honda no longer makes the original ignition coil that steps up the
voltage by 3 -4 orders of magnitude.

What's the easiest way to get a 40,000 volt spark out of a 12 volt ac
system with a 100X step up coil?

the ignition coil doesn't need a 3000:1 ratio to step the voltage up.
the ignition system is a flyback circuit.

If the coil is a transformer use the energy transfer circuit,
this works by benerating a voltage spike in the magneto by
interrupting the magneto current and putting the resulting voltage
spike across the transformer primary.

If it's a coupled inductor use the energy storage circuit which
generates the voltage in the ignition coil by interrupting the coil's
primary current.

--
⚂⚃ 100%


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[John Larkin]

On Sat, 19 May 2012 00:56:20 -0700 (PDT), Bret Cahill
<BretCahill@peoplepc.com> wrote:

OK Honda no longer makes the original ignition coil that steps up the
voltage by 3 -4 orders of magnitude.

What's the easiest way to get a 40,000 volt spark out of a 12 volt ac
system with a 100X step up coil?


Bret Cahill

1. Apply 12 volts to the primary for some milliseconds, then interrupt
it. A mechanical contact (aka "points") or a switch or relay contacts.
Or a mosfet.

2. Use a dc/dc converter to charge a capacitor to a couple hundred
volts and discharge that into the primary. All the stuff you need is
inside a disposable flash camera.

When I was a kid I used to dump a charged oil cap into a car coil
through a thyratron tube. It was hard to insulate the output... it
would punch an arc through practically anything. The only usable
output connector was a plastic tube filled with motor oil.




--

John Larkin Highland Technology Inc
www.highlandtechnology.com jlarkin at highlandtechnology dot com

Precision electronic instrumentation
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Custom timing and laser controllers
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Multichannel arbitrary waveform generators

 

[Tom Biasi]

On 5/19/2012 12:59 PM, John Larkin wrote:

When I was a kid I used to dump a charged oil cap into a car coil
through a thyratron tube. It was hard to insulate the output... it
would punch an arc through practically anything. The only usable
output connector was a plastic tube filled with motor oil.




Didn't your mother ever tell you you would arc your eye out with that?