audio modulated tesla coil, part 1: testing the modulator

This is the first complete test of the modulator and the high voltage autotransformer.
The modulation is PWM and i made it using a KA3525. the output of the ic is amplified with a couple of transistors and then it goes to an autotransformer(an ignition coil of a car) this hv modulated signal will go into the primary of the tesla coil passing trough an hv cap and a spark gap.

Category:

Science & Technology

Tags:

• audio
• modulation
• tesla
• coil
• ka3525
• pwm
• hv

[lucassiglo21]

yes, but when i tried to rise the frequency, the autotransformer i was using stopped working, that car ignition transformer is not designed to work at such frequencies, i would need something better, and i will continue this proyect when i can afford the correct transformer with (i think) a ferrite core.

[RotogenRay]

are you just varying the duty cycle? If you varied the frequency and upped the power a little more it would come out more the tone you intended, the inherent sound of the spark drowns out the modulation. If you tried PWM while driving it with some frequency out of audio range- over about 20khz- the PWM would be more noticeable.

Good job.