Re: ignition coil
From: Edward V. Phillips[SMTP:ed-at-alumni.caltech.edu]
Sent: Monday, July 21, 1997 2:12 PM
Subject: Re: ignition coil
"Subject: ignition coil
I got an ignition coil yesterday from a friend and I hooked it up to my
relay. With a wire connected to the high voltage terminal I drew sparks
off of the the other terminals. The sparks weren't very big though
(3-5mm). I can control the speed of my relay now by putting a capacitor
across the relay terminals, but that just determines the speed of the
I just don't get why the sparks are so small. If I just have the coil
and a power supply, everytime I brush the wire from one the coil's
terminals (not the high voltage one) with a wire from the power supply,
I get big bright sparks.
I built a pulse generator (circuit found at
but the results with it were non-existant.
What can I "
Do you have a capacitor across the relay contacts?