yes they are from cars, corona is a discharge around high voltage wires with enough voltage, it is an "escaping charge" manifesting in the form of a purpish discharge. It likes to escape from sharp points, and bringing a ground nearby increases the voltage gradient and makes the corona more intense, until a breakdown happens (spark or arc).
I think the pros glue a PVC extender on the ouput connector to prevent arc overs. What was the power supply voltage? Frequency? Driver transistor? I have heard of operation on 110 volts for very short times!
I know how to prevent arcovers, I intentionally left it like this because I didn't want it to fail internally within the first test.
I used a dimmer-like TRIAC "chopper" circuit in series with a 5uF capacitor connected to mains (240V). The calculated "bang" energy by itself is really not enough to overheat the coil in a few minute run.
Don't Pee on it whatever you do! LOL
Hallaran 1 year ago
do you have the schematic ???? can you pass to me???
tanks by hvdavi
Hvdavi 1 year ago
Ohh i love this circuit! probably much cheaper than the dimmer switch driver, but does it have the same performance?
zker666 1 year ago
are u using a square wave pulse generator? what kind of transistor or mosfet are u using?
tonysie 2 years ago
I was using a circuit with a TRIAC similar to the light dimmer circuit, with a 5uF capacitor in series, ran from 230 mains.
jmartis2 2 years ago
hi jan, arent these ignition coils out of cars? and whats corona
samssoftwareuser 2 years ago
yes they are from cars, corona is a discharge around high voltage wires with enough voltage, it is an "escaping charge" manifesting in the form of a purpish discharge. It likes to escape from sharp points, and bringing a ground nearby increases the voltage gradient and makes the corona more intense, until a breakdown happens (spark or arc).
jmartis2 2 years ago
I think the pros glue a PVC extender on the ouput connector to prevent arc overs. What was the power supply voltage? Frequency? Driver transistor? I have heard of operation on 110 volts for very short times!
bobdavis321 3 years ago
I know how to prevent arcovers, I intentionally left it like this because I didn't want it to fail internally within the first test.
I used a dimmer-like TRIAC "chopper" circuit in series with a 5uF capacitor connected to mains (240V). The calculated "bang" energy by itself is really not enough to overheat the coil in a few minute run.
jmartis2 3 years ago
jup, i smell ozone !
nice coil
maybe you shut put the coil under oil to prevent arcing.
i made some bad experience using wax to protect my flyback from arcing over.
actually the internal rectifying diodes died, and corona was arcing all over the place !!
because of the high frequency it is easy for the ( AC ) high voltage to capacitivly couple trough the flyback casing
and because of the hot arcs the wax was dripping on my workbench ( its a pain in the ass to clean up...)
transistorbrater 3 years ago
works good for how old it is
juniortore 3 years ago
I was surprised too :)
jmartis2 3 years ago