Have a couple of manual testers, but would like to build an LED
in-line unit to test spark on two, four, and six cylinder outboard
motors. Anyone have a design or know where such a unit can be obtain?
tks, alp

"edolo" wrote in message
...
Have a couple of manual testers, but would like to build an LED
in-line unit to test spark on two, four, and six cylinder outboard
motors. Anyone have a design or know where such a unit can be obtain?
tks, alp

Would be probably as cheap and even more handy to just get an inductive
pickup timing light.

know any LED's which can handle 12,000volts?
"edolo" wrote in message
...
Have a couple of manual testers, but would like to build an LED
in-line unit to test spark on two, four, and six cylinder outboard
motors. Anyone have a design or know where such a unit can be obtain?
tks, alp

"Short Wave Sportfishing" wrote in message
...
On Tue, 19 Dec 2006 16:09:04 -0500, "news.wildblue.net"
wrote:

know any LED's which can handle 12,000volts?

?

About 2,000 or so of them in series.

"news.wildblue.net" wrote in message
...
know any LED's which can handle 12,000volts?
"edolo" wrote in message
...
Have a couple of manual testers, but would like to build an LED
in-line unit to test spark on two, four, and six cylinder outboard
motors. Anyone have a design or know where such a unit can be obtain?
tks, alp



All with a little added circuitry.

news.wildblue.net wrote:
know any LED's which can handle 12,000volts?


Why would it have to handle 12,000 volts?

Your better off buying a tester off of ebay for 30bucks that
can test the plug and voltage (strength) of the spark.
Just clamps to the batter and one plug at a time.

If you just want to see it fire, the little light testers that go on
there for $5.00 will due ok. (small light encased in clear plastic
that goes in between the spark plug and the plug wire.

Building one out of leds??? Most likely more work that its
actually worth.

Tom

edolo wrote:
Have a couple of manual testers, but would like to build an LED
in-line unit to test spark on two, four, and six cylinder outboard
motors. Anyone have a design or know where such a unit can be obtain?
tks, alp

that's about the firing voltage of a spark plug.

"basskisser" wrote in message
ups.com...

news.wildblue.net wrote:
know any LED's which can handle 12,000volts?


Why would it have to handle 12,000 volts?

Thanks all! Yes you can build a circuit to take even 50,000 volts,
but that's beside the point. Sure I could spend four hundred a buy
the real thing, but where is the fun in that - & besides, I was
thinking of taking the four hundred with me when I go. cheers!!!

On Wed, 20 Dec 2006 16:23:03 -0500, Gene Kearns
wrote:

On Tue, 19 Dec 2006 18:32:06 GMT, edolo penned the following well
considered thoughts to the readers of rec.boats:

Have a couple of manual testers, but would like to build an LED
in-line unit to test spark on two, four, and six cylinder outboard
motors. Anyone have a design or know where such a unit can be obtain?
tks, alp

I remember seeing these things 40 years ago. IIRC.... think neon....
Anyway, the parts might be difficult to obtain. See Mouser and the
like.....

You want one of those little neon panel lights. Add a fairly high
value resistor and you have a spark detector.

edolo wrote:
Thanks all! Yes you can build a circuit to take even 50,000 volts,
but that's beside the point. Sure I could spend four hundred a buy
the real thing, but where is the fun in that - & besides, I was
thinking of taking the four hundred with me when I go. cheers!!!

On Wed, 20 Dec 2006 16:23:03 -0500, Gene Kearns
wrote:

On Tue, 19 Dec 2006 18:32:06 GMT, edolo penned the following well
considered thoughts to the readers of rec.boats:

Have a couple of manual testers, but would like to build an LED
in-line unit to test spark on two, four, and six cylinder outboard
motors. Anyone have a design or know where such a unit can be obtain?
tks, alp

I remember seeing these things 40 years ago. IIRC.... think neon....
Anyway, the parts might be difficult to obtain. See Mouser and the
like.....