Broken down :(

Hasn't he done that already

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You could get the simple one?
Suites you sir!

 

Only if you buy the complicated one and fiddle with it...

 

Don’t forget it’s a Yorkshire module and not guaranteed to work in a big soft Southern van.

 

Ha! I’ve been rumbled . Never could spell it.

 

Do you ever find yourself in a shop saying "aw moooch" or " well I go to the foot of our stairs"

 

That begs the question, which half? The bottom, or the top half?

 

I would know more about Accuspark failures if I could complete my scratching the potting compound off one of my Accuspark units.
But this 7kg cat, also known as Freddie Mercury stole it.




Top picture is my daughter's doodle. Mostly accurate. Bottom one was me.

 

Maybe a member has a knackered one they could send you to dissect

That’s a knackered accuspark/power spark not a knackered cat.

 

That would be...disturbing...

 

I think the cat is broken. He weighs 7kg and has a squeak instead of a miaow.
I do now have another Accuspark after this weekend. Another one to try. This was state of play before cat theiving.
.

Q1 is the black wire switch

1,2,3 are a hall effect magnet sensor which got dremeled out of existence.. Resistors are all thick film on a ceramic substrate.

 

Good work Mike, from your sketch it looks like most of the gubbins is protected by the two zeners, so would the failure be due to exceeding the voltage ratings of the switch transistor on the negative swing of the coil primary or maybe just too much power being dissipated by Q1.
Which part has actually failed?