Firestorm108/Self-Tuning-SSTC4Solid state tesla coil that switches automatically in resonance!
Self Tuning SSTC is an open-source printed circuit board by Firestorm108, from the Firestorm108/Self-Tuning-SSTC repository on GitHub. It is a 2-layer board of 100 × 93.7 mm with 48 parts on 33 nets, routed with 195 tracks and 4 vias.
It is built around the FGA60N65SMD, L7805 and KBPC5010W, with the KBPF307G among its other parts. Its parts include 12 connectors, 11 capacitors, 8 diodes, 6 resistors and 4 ICs.
A solid state Tesla coil that utilizes a half-bridge configuration, automatic tuning through an antenna so that the coil is always in perfect resonance, and a 555-based interrupter. It runs straight off 120VAC with FGA60N65 IGBTs, allowing it to push many many watts. This should make for a good display at Open Sauce 2026.
Please do NOT make this under any circumstances unless you are experienced in the field. While this is a solid state coil, it runs off 340VDC from mains and is lethal to anyone who doesn't know what they are doing. I recommened starting with a simple slayer exciter circuit or low voltage primary SSTC circuits. I do not hold any responsibility for what you choose to do with this information.
Demo: https://www.instagram.com/p/DbAHNh3O-ZV/
*You can find the spreadsheet version here: https://docs.google.com/spreadsheets/d/1Wt0Rxcv9VSmFwRn_iBSPhIluuYkqVSy19_F0Ip-qjvU/edit?usp=sharing
| Item | Price | Source |
|---|---|---|
| PCB | $5 | JLCPCB |
| 1N4007 | $0.76 | DigiKey |
| 10K Potentiometer | $3.56 | DigiKey |
| Resistor Kit | $5 | Amazon |
| 470µF 18V Capacitors (×3) | $1 | DigiKey |
| 1N4148 | $0.40 | DigiKey |
| Ceramic Capacitor Kit | $7 | Amazon |
| Ferrite 77 | $2 | DigiKey |
| 1N5818 | $1.50 | DigiKey |
| FGA60N65 | $15 | DigiKey |
| Thermistor (30A / 1Ω) | $10 | Amazon |
| L7805 | $6 | Amazon |
| KBPF307G | $1 | DigiKey |
| 0.82µF / 600V Film Capacitor | $10 | DigiKey |
| KBPC5010W | $4 | DigiKey |
| 1000µF 250V Capacitors (×2) | $15 | DigiKey |
| LM555xN | $1.50 | DigiKey |
| LM7812 (TO-220) | $1.80 | DigiKey |
| Screw Terminals | $6 | Amazon |
| 30AWG Magnet Wire | $22 | Amazon |
| 4.5" × 12" PVC Tube | $21 | Amazon |
| Topload | $20 | eBay |
| Mains Cord | $6 | Amazon |
| 15mm M3 Standoffs | $8 | Amazon |
| IEC Power Inlet | $9 | Amazon |
| 12VAC Transformer | $14 | Amazon |
| Antenna | Owned | |
| EMI Shielding Tape | $7 | Amazon |
| Rubber Feet | Owned | |
| TO-220 Heatsinks | $8 | Amazon |
| 12AWG Wire | $12 | Amazon |
| IRFP460 | $10 | Amazon |
| Vendor | Total |
|---|---|
| DigiKey | $80 |
| Amazon | $170 |
| eBay | $22 |
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 2 | 0.82uF/600V | Capacitor_THT:C_Rect_L31.5mm_W13.0mm_P27.50mm_MKS4 | C10, C11 |
| 2 | 1000uF 250V | Capacitor_THT:CP_Radial_D22.0mm_P10.00mm_SnapIn | C1, C2 |
| 2 | 1N4007 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D3, D4 |
| 2 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D7, D8 |
| 2 | 1N5818 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D5, D6 |
| 2 | 470uF 18V | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C3, C4 |
| 2 | 6.8 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5, R6 |
| 2 | FGA60N65 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J10, J11 |
| 2 | R_Potentiometer | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | RV1, RV2 |
| 1 | 0.1uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C9 |
| 1 | 0.33uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C6 |
| 1 | 120VAC | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | 12VIN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | 12VOUT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | 16V 10uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C7 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 1uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C8 |
| 1 | 2.2K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 30A/1ohm | Varistor:RV_Disc_D12mm_W7.9mm_P7.5mm | TH1 |
| 1 | 470uF 12V | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C5 |
| 1 | 50K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 5K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | Antenna | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J2 |
| 1 | Earth Ground | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J12 |
| 1 | GDTIN | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | GDTOUT1 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J6 |
| 1 | GDTOUT2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J7 |
| 1 | KBPC5010W | Diode_THT:Diode_Bridge_GeneSiC_KBPC_W | D1 |
| 1 | KBPF307G | KBP307:SIP350W81P380L1450H1280Q4 | D9 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | LM555xN | Package_DIP:DIP-8_W7.62mm | U3 |
| 1 | LM7812_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U1 |
| 1 | Primary Bottom | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J8 |
| 1 | Primary Top | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J9 |
| 1 | ~ | Package_DIP:DIP-8_W7.62mm | U4 |
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It measures 100 × 93.7 mm and has 2 copper layers, 1.6 mm thick.
48 parts, built around the FGA60N65SMD, L7805, KBPC5010W and KBPF307G. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the Firestorm108/Self-Tuning-SSTC repository on GitHub, at the commit this page was made from: the board is PCB Files/SelfTuningSSTC.kicad_pcb and its schematic PCB Files/SelfTuningSSTC.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask Firestorm108 before reusing the design.