Topic: How do Atom Computer Ignition modules work? – Page 20

This topic has 215 replies, 30 voices, and was last updated 7 years, 6 months ago by joesnuffy.

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June 14, 2017 at 1:36 pm #59677
debe
Participant
Its a silicone heat sink material from electronic stores to suit TO220 transistor shape.
June 14, 2017 at 1:46 pm #59679
debe
Participant
Theres a step by step pictures of how to assemble these on http://www.electro-tech-online.com/thre … le.142530/ its posted ATOM Diy module by debe.
June 14, 2017 at 2:02 pm #59680
bob-d
Participant
US Member
Great write up. Thank you.
June 14, 2017 at 9:23 pm #59695
chinewalker
Participant
US Member
I bought a module for my old Stihl chainsaw recently. Not sure if it’s the same thing, but I believe it works the same way. It mounts externally (coil is external to flywheel on my saw) and it replaces both the points and condenser. Worked really well! I might snag a pair of them at some point and see if and how they work in an outboard mounted under the flywheel.
June 14, 2017 at 11:18 pm #59698
Mumbles
Participant
The Atoms were color coded for different applications and the red ones are what you want for outboard motors.
June 15, 2017 at 11:49 am #59718
joesnuffy
Participant
Thanks for all the info. Great job.

Joe
June 15, 2017 at 6:26 pm #59734
ken-w
Participant
US Member
My attempt with a high voltage Darlington @ 300v and testing with a IGBT @ 430v.

Ken W
June 15, 2017 at 6:42 pm #59735
ken-w
Participant
US Member
Picture of device Installed, I have video but the file is too big for Photobucket. I can spin the flywheel with my hand and get a nice fat spark with every revolution.

Ken W
June 15, 2017 at 7:34 pm #59738
wedgie
Participant
That’s a thing of beauty Ken.
June 15, 2017 at 9:37 pm #59741
phil-b
Participant
quote Ken W:

My attempt with a high voltage Darlington @ 300v and testing with a IGBT @ 430v.

Neato!

It seems like most of the power darlingtons suitable for the "ATOM" circuit are no longer made, and replaced by IGBTs in new applications.

Your build is VERY tidy! It looks printed circuit board ready!
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