2 layers64.8 × 76.2 mm
2 layers96.8 × 101.5 mm
PLL SSTC
Pranav2008-droid/PLL-SSTCThis is a Phase locked loop Solit State Tesla Coil that I'm designing including the schematics and the pcb design.
- Size
- 96.8 × 101.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 96
- Nets
- 69
- Pads
- 277
- Tracks, vias
- 418, 39
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 24 Aug 2026
- Updated
- 28 Sep 2026
Overview
PLL SSTC is an open-source printed circuit board by Pranav2008-droid, from the Pranav2008-droid/PLL-SSTC repository on GitHub. It is a 2-layer board of 96.8 × 101.5 mm with 96 parts on 69 nets, routed with 418 tracks and 39 vias.
It is built around the ATTINY85-20PU, 74HC08N and 74HC14N, with the 74HC74D, CD4046BE and IRFP460PBF among its other parts. Its parts include 25 capacitors, 21 resistors, 16 diodes, 8 ICs and 7 connectors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
10
ATTINY85-20PU
PDIP-8-40℃~+85℃ 10bit 2.7V~5.5V 20MHz 512Byte 512Byte 6 8 Bit 8KB AVR Built-in FLASH PDIP-8 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
74HC08N
DIP-14-40℃~+85℃ 1.5V、3.15V、4.2V 1.9V、4.4V、5.9V 18ns@4.5V,50pF 2 260mV 2V~6V 2uA 4 5.2mA 5.2mA 500mV、1.35V、1.8V 74HC Series AND Gate DIP-14 Logic Gates ROHSHGSEMILogic Gates74HC14N
DIP-14-40℃~+85℃ 1.9V、3.98V、4.4V、5.48V、5.9V 100mV、100mV、100mV、260mV、260mV 11ns@6V,50pF 2V~6V 2uA 6 74HC Noise suppression function Schmitt trigger DIP-14 Inverters ROHSHTC Korea TAEJIN TechInverters
74HC74D
SOIC-14-40℃~+125℃ 1 15ns 2 2V~6V 3.5pF 37ns@6V,50pF 3ns、3ns、3ns 40uA 5.2mA 5.2mA 74HC Series 82MHz Asynchronous Complementary D-Type Rising Edge Set and Reset SOIC-14 Flip Flops ROHSNexperiaFlip Flops
CD4046BE
PDIP-16-55℃~+125℃ 2.4MHz 3V~18V External PDIP-16 Clock Generators, PLLs, Frequency Synthesizers ROHSTexas InstrumentsClock Generators, PLLs, Frequency Synthesizers
IRFP460PBF
TO-247AC-3-55℃~+150℃ 1 N-channel 20A 210nC@10V 270mΩ@10V 280W 350pF 4.2nF 4V 500V 870pF N-Channel TO-247AC-3 MOSFETs ROHSVishay IntertechnologyMOSFETsMUR1560-HXY
TO-220AC-55℃~+150℃ 1 Independent 1.5V@15A 150A 15A 1mA 600V 60ns TO-220AC Fast Recovery / High Efficiency Diodes ROHSHXY MOSFETFast Recovery / High Efficiency Diodes
OY100KE
插件,D7xL19mm-1600ppm/℃~-1000ppm/℃ -40℃~+220℃ 10Ω 2W Ceramic Resistor ±10% 插件,D7xL19mm Through Hole Resistors ROHSOhmiteThrough Hole Resistors
SMBJ18CA
DO-214AA(SMB)ESD And Surge Protection (TVS/ESD)hongjiacheng
FDS4559
SOP-8-55℃~+150℃ 1 N-Channel + 1 P-Channel 1.2V 25nC@10V、26nC@10V 25pF、110pF 2W 30mΩ@10V、88mΩ@10V 500pF、1.45nF 5A、6A 60V 60pF、145pF N-Channel + P-Channel SOP-8 MOSFETs ROHSTECH PUBLICMOSFETs
README
README.mdPLL SSTC
Overview
The PLL SSTC stands for Phase Locked Loop Solid State Tesla coil. This device produces high voltage sparks that resemble lightning by exciting a secondary coil at its resonant frequency.
This system tracks the resonant frequency using a Phase Locked Loop (PLL) IC: CD4046. It uses the output from the PLL to drive a full bridge switching circuit at around 300-325VDC.
It also has the capability to play audio through both Amplitude Modulation (AM) and Frequency Modulation (FM). It operates at 250kHz and should switch power in the Kilowatt range.
⚠️ High Voltage Warning
This project involves potentially lethal voltages and high-frequency/high-power switching. Do not build or operate it unless you understand the relevant electrical safety risks.
Gate Driver
I'm using a TC4428 paired with 2 N-channel/P-channel dual MOSFET ICs to produce an amplified signal capable of producing higher driving currents. Any MOSFET driving IC with one inverting and one non-inverting output should work in the PCB, such as the UCC27425.
GDT
The Gate Drive Transformer must be large enough to not saturate from driving currents and be of the correct material to work properly under such high frequencies.
Mosfets
My circuit shows IRFP460s as the full bridge switches, but they are a bit outdated and inefficient. Much better alternatives exist — IGBTs can also be used instead.
Primary
Make sure the primary impedance is high enough such that your switches can handle the currents.
Demo
Demo of the amplitude modification music played through an attiny interupter: https://www.youtube.com/shorts/cHrE9xm2R9Q
Parts
96| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 0.1µF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C3, C8, C10, C11, C12, C13, C14, C15, C16, C17, C22, C25 |
| 6 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D3, D4, D7, D8, D13, D14 |
| 5 | 2.2nF | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C18, C19, C20, C21, C23 |
| 5 | 6.8 | Resistor_THT:R_Axial_DIN0922_L20.0mm_D9.0mm_P7.62mm_Vertical | R12, R13, R16, R17, R19 |
| 4 | Conn_01x01_Socket | Connector_Wire:SolderWire-4sqmm_1x01_D3mm_OD6mm | J1, J2, J3, J4 |
| 4 | IRFP460PBF | IRFP460PBF:TO546P1587X531X2511-3 | Q3, Q4, Q5, Q6 |
| 4 | MUR1560H | MUR1560H:TO508P997X444X1905-2 | D11, D12, D19, D20 |
| 4 | OY100KE | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P7.62mm_Vertical | R10, R11, R14, R15 |
| 4 | SMBJ18CA | SMBJ18CA:DIOM4336X265N | D5, D6, D15, D16 |
| 3 | Conn_01x02_Socket | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | +12V1, +12V2, +12V3 |
| 3 | Conn_01x02_Socket | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-3-2-5.08_1x02_P5.08mm_Horizontal | J5, J6, J7 |
| 2 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C6 |
| 2 | 10k | trimpot_foot:TRIM_3296W-1-250 | R1, R2 |
| 2 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6, R7 |
| 2 | 1N5818 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1, D2 |
| 2 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4, R20 |
| 2 | 2.2uF | Capacitor_THT:C_Rect_L31.5mm_W15.0mm_P27.50mm_MKS4 | C9, C24 |
| 2 | FDS4559 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | Q1, Q2 |
| 2 | R_Potentiometer | Potentiometer_THT:Potentiometer_Bourns_3296X_Horizontal | RV1, RV2 |
| 1 | 1.5nf | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C4 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical | Re1 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R18 |
| 1 | 10nf | Capacitor_THT:C_Rect_L7.0mm_W2.5mm_P5.00mm | C5 |
| 1 | 120k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R21 |
| 1 | 12k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | 150k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 1uF | Capacitor_THT:C_Rect_L31.5mm_W15.0mm_P27.50mm_MKS4 | C7 |
| 1 | 20k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 47k | Potentiometer_THT:Potentiometer_Bourns_3296X_Horizontal | RV3 |
| 1 | 5k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9 |
| 1 | 74HC08N | 74HC08N:DIP254P762X420-14 | U5 |
| 1 | 74HC14N | 74HC14N:DIP764W47P254L1920H431Q14 | U3 |
| 1 | 74HC74 | Package_DIP:CERDIP-14_W7.62mm_SideBrazed_LongPads_Socket | U2 |
| 1 | ATtiny85-20P | Package_DIP:DIP-8_W7.62mm | U4 |
| 1 | CD4046BE | CD4046BE:DIP794W45P254L1969H508Q16 | U1 |
| 1 | LM7805_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U8 |
| 1 | MAX809SEUR_T10T | MAX809SEUR_T10T:SOT95P237X112-3N | U6 |
| 1 | SW_SPST | TerminalBlock_4Ucon:TerminalBlock_4Ucon_1x02_P3.50mm_Horizontal | SW1 |
| 1 | ~ | Package_DIP:DIP-8_W7.62mm_LongPads | GD1 |
| 1 | ~ | GDT:GDT_1P4S | U7 |
The 92 most common of 96 parts.
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Questions
How big is the PLL SSTC PCB?
It measures 96.8 × 101.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PLL SSTC use?
96 parts, built around the ATTINY85-20PU, 74HC08N, 74HC14N and 74HC74D. 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.
Where can I download the PLL SSTC KiCad files?
From the Pranav2008-droid/PLL-SSTC repository on GitHub, at the commit this page was made from: the board is PLL_SSTC.kicad_pcb and its schematic PLL_SSTC.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PLL SSTC design in my own project?
Its repository states no licence, so its author keeps all rights: ask Pranav2008-droid before reusing the design.