Here is a very simple
circuit that will provide high voltage (15-40kV) sparks using a common ignition
coil. The input is 12VDC at around 5 to 6 amps. Mine produces sparks that are
about 3/4″ to 1″ in length. A 2N3055 NPN power transistor is pulsed with a
square wave signal that comes from the 555 timer IC. The frequency of the pulses
depends on the resistors between pins 7 and 8 and between pins 7 and 6. The
pulse is also dependent on the capacitor. You can experiment with these values.
Try inserting a smaller capacitor to raise the frequency. At different
frequencies the sparks will change certain characteristics. At a high frequency
the sparks will get fatter but shorter in length. At lower frequencies the spark
maybe longer but thinner. I assembled my project on a solderless breadboard. You
can use whatever you like. The capacitor should be a tantalum or mylar type, but
this is not absolutely necessary. A ceramic type should work fine just as long
as the temperature is not too high around it
No comments:
Post a Comment