Solid State Tesla Coil uses transistor-based switching devices (instead of Spark Gap) to resonate the secondary coil with or without feedback. The both kinds of circuits (with and without feedback) were designed and implemented. The features of the SSTC are:

1. Feedback and without feedback Circuits
2. Variable duty cycle Interrupter
3. Music Interrupter to play music from SSTC
4. PCB Design

The design of the tesla coil is described below,

1. Primary Coil
   Primary Coil consist of 5mm copper pipe with 6 turns wound around the secondary with 3D printed support.
   
2. Secondary Coil
   The secondary winding are wound around a 2-inch PVC water pipe with 36 gauge copper motor winding wire. The length of the pipe is around 25cm with winding height of 20cm. 5cm of PVC pipe is kept as a margin. Around 1200 turns of described wire was winded.
   
3. Top Load
   The top load was 3D printed in two halves and then aluminium tape was wrapped around it. The tape was wrapped with as much wrinkles as possible to reduce charge loss. The 3D files are available to download on this GitHub page
   
4. 3D printed holder for coils
   Using Fusion 360, the coil holder was designed. The files for the holder can also be downloaded from this github page.
   

As described in the Introduction section, the different circuits were designed to incorporate all the features. Before actually implementing tho, these were simulated using LTSpice.
The Complete circuit diagram and all the simulation files are available on this page.

A PCB was designed using Altium. The PCB is a 4 layer board with 100mm x 100mm dimensions. All generic parts THT parts were used in this design. The features of the PCB are:

1. It uses tuneable non-feedback circuit
2. Can also play music. The music input can be given using 3.5mm mobile AUえーゆーX cable.
3. Circuit is tested with voltages from 12V to 15V