k7elp60
Active Member
An automotive ignition coil is a transformer with a primary and a secondary.
In the old days when the distributor had a set of mechanical points the primary was fed from the battery feed. When the points opened the lack of current flow in the primary caused the magnetic field to collasp generating a large voltage in the secondary to fire a spark plug. How it is done in the modern cars the only thing I know that there is an ignition coil.
You can take any power transformer that is not connected to the mains voltage and feed a pulsing dc to the low voltage secondary and you will have a much higher voltage on the primary.
A small radio shack audio transformer that has a 1K primary impedance and a 8 ohm secondary will give over 700 volts if the 8 ohm secondary is pulsed with a 9V battery.
In the old days when the distributor had a set of mechanical points the primary was fed from the battery feed. When the points opened the lack of current flow in the primary caused the magnetic field to collasp generating a large voltage in the secondary to fire a spark plug. How it is done in the modern cars the only thing I know that there is an ignition coil.
You can take any power transformer that is not connected to the mains voltage and feed a pulsing dc to the low voltage secondary and you will have a much higher voltage on the primary.
A small radio shack audio transformer that has a 1K primary impedance and a 8 ohm secondary will give over 700 volts if the 8 ohm secondary is pulsed with a 9V battery.