Re: [TCML] Ignition coil etc

["Quarkster" <quarkster@xxxxxxx>]

Rhys -

Do you intend to just connect the output of your "wall-wart" 60 Hz 
transformer to the primary of the ignition coil?

Unfortunately, this is unlikely to work. Your ignition coil is designed to 
operate on a pulsed-DC input, not 60Hz AC.

If it is a coil for an old (1960's vintage) Mustang, it was used in a 
"points and coil" ignition system, where a mechanically operated switch 
(ignition points) sent pulses of 10V DC through the coil's primary.

If it is a coil from a newer Mustang, it was used in a 
"capacitive-discharge" ignition system, where a DC-DC converter charged a 
capacitor up to several hundred volts, and discharged this capacitor into 
the ignition coil's primary.

A commercial solid-state AC lamp dimmer ($8.00 at Home Depot) plus a 
capacitor can be used to drive an auto ignition coil to provide a 
high-voltage output.

A Google search on "ignition coil drivers" will bring up many options for 
both AC and battery powered ignition coil driver circuits.

Regards,
Herr Zapp
----- Original Message ----- 
From: "Rhys Sage" <rhys_sage@xxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, October 01, 2009 10:58 AM
Subject: [TCML] Ignition coil etc


I've just got myself a nice new ignition coil and a 16v AC 1000ma plugin 
transformer. Is there anything I should put between the coil and the 
transformer to protect either or both when I wire it up and plug it all into 
the wall? Is there liable to be a backlash from the coil when I unplug the 
transformer? Should I put a switch in between transformer and coil?

I have no idea how high voltage the coil is. It's a new coil for a Mustang. 
Quite nice and small - made in China and no other markings on it. The box 
says MasterPro E70 and the UPC is 84126602575.

I figure it's a lower voltage coil so a higher voltage input should be fine.




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