Here is the schematic diagram for the SSTC. It includes most of the electronics on the Tesla Coil side of the fiber optic connection but does not include the interrupter.
This circuit here was meant to be my final interrupter. It featured an audio pre-amplifier, DC offset control, PWM generator, and a VU meter to view the audio volume level. Unfortunately, I never got around to completing this circuit--aside from making a working prototype on a breadboard--since my Tesla Coil did not work properly to begin with. The interrupter I used in its place for experimenting was based on an Arduino-nano which outputted an adjustable PWM signal that powered the fiber-optic transmitter.