Plasma speaker. Plasma music, musical tesla coil arduino IRFP 250 Mosfet , 25N120 and op amp 358

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Pirates of Caribbean on Tesla coil
The basic circuit of tesla coil using IRFP 250 N Mosfet is in series with 25N120 Fast IGBT Power Transistor with its gate being supplied voltage through LM358 inverting pin. The non inverting pin is connected to PWM pin of arduino.

Plasma discharge is at a certain frequency which is determined by the note played by arduino and this input is amplified by op amp for supplying required voltage at gate of IGBT which is in series with IRFP 250 N. This is producing sound. It is like amplitude modulation
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