9-12V BD243 Mini Tesla Coil Wireless Transmission DIY Kit

9-12V BD243 Mini Tesla Coil Wireless Transmission DIY Kit is an unassembled Slayer-Exciter resonant transformer soldering kit designed to demonstrate wireless power transmission, high-frequency plasma corona discharge, and electromagnetic resonance. Featuring an integrated spiral primary coil etched directly into the PCB and a pre-wound enamelled copper secondary coil driven by a heatsink-mounted BD243C NPN power transistor, it wirelessly illuminates neon bulbs and fluorescent tubes brought near the secondary coil when powered from a 9V to 12V DC supply.

Key Features:

• Wireless Power Transmission: Generates a high-frequency electromagnetic field around the resonant secondary coil that lights up neon lamps, LEDs, and fluorescent tubes wirelessly without physical contact.
• Integrated PCB Primary Winding: The primary resonant turn is etched directly into the FR-4 circuit board, eliminating manual primary winding errors and guaranteeing correct phasing.
• Pre-Wound Secondary Coil: Includes a pre-wound fine-gauge enamelled copper secondary resonator tube ready to glue onto the center of the PCB.
• Heatsink-Mounted BD243C Driver: Uses a rugged TO-220 BD243C NPN power transistor mounted on an anodized aluminum heatsink for continuous resonant oscillation.
• Dual Blue Status LEDs: Onboard 3mm blue indicator LEDs visually confirm oscillation and protect the transistor base-emitter junction against reverse breakdown.

Technical Specifications:

• Circuit Topology: Slayer-Exciter Solid-State Resonant Tesla Coil
• Input Supply Voltage: 9V to 12V DC (9V starts wireless transmission; 12V 1A–2A produces visible tip corona arc)
• Operating Current: ~150mA to 800mA at 12V DC
• Active Switching Device: BD243C NPN Power Transistor (TO-220, 100V, 6A)
• Power Input Connector: 5.5mm × 2.1mm DC-005 Barrel Jack with 8×8mm Push-Button Power Switch
• Assembly Status: Unassembled DIY Through-Hole Soldering Kit

Mechanical Specifications:

• PCB Material: FR-4 Fiberglass with Embedded Spiral Primary Trace
• Secondary Coil Form: Pre-Wound PVC/Acrylic Cylinder with Top Discharge Lead
• Stand-offs: 4 × M2×7mm Brass Standoff Pillars + 4 × M2×4mm Mounting Screws
• Heatsink Size: 15 mm × 10 mm × 20 mm Finned Aluminum Heatsink

Dimensions:

• PCB Footprint: 40 mm × 31 mm
• Secondary Coil Height: ~40 mm to 50 mm
• Assembled Weight: ~28 g

Pinout and Wiring:

• DC-005 Jack (9V–12V DC): Connect a center-positive 9V–12V DC power adapter.
• Secondary Bottom Wire: Scrape enamel insulation from the bottom fine copper lead of the secondary coil and solder to the central pad adjacent to the BD243C base/LED junction.
• Secondary Top Wire: Leave extending 5mm at the top of the coil in free air as the high-voltage corona discharge terminal.
• Neon Bulb Test: Hold the included miniature neon bulb 1cm to 3cm away from the energized coil to observe wireless plasma illumination.

Datasheet Reference:

• Driver Transistor Reference: BD243C NPN Epitaxial Silicon Power Transistor Datasheet (PDF)
• Included Kit Components: 1× PCB, 1× Pre-Wound Secondary Coil, 1× BD243C Transistor, 1× Aluminum Heatsink + M3×6 Screw, 2× 10kΩ Resistors, 2× 105 (1µF) Monolithic Capacitors, 2× 3mm Blue LEDs, 1× DC-005 Jack, 1× 8×8mm Self-Locking Switch, 1× Neon Test Bulb, 4× M2×7 Brass Standoffs, 4× M2×4 Screws.

Commonly Used in:

• Physics Classroom Wireless Energy Transfer & Resonance Demonstrations
• STEM Soldering Workshops and Electronics Training Labs
• Desktop Science Fair Exhibits and Plasma Demonstrators
• High-Frequency Electromagnetic Field Education

Applications:

• Demonstrates Nikola Tesla’s resonant inductive coupling principles by lighting neon bulbs and compact fluorescent tubes through the air.
• Teaches students through-hole soldering, transistor heatsink mounting, and self-resonant Slayer-Exciter feedback circuits.
• Produces a safe, low-current purple corona plume at 12V DC for desktop high-voltage physics displays.

Equivalent Models:

• 15KV Arc Ignition Generator Inverter DIY Kit: High-frequency step-up transformer kit focused on hot ignition arcs rather than wireless field transmission.
• DC 3-5V Arc Igniter Lighter DIY Kit: Compact battery-powered blocking-oscillator plasma arc kit.

Package Includes:

• 1 × 9-12V BD243 Mini Tesla Coil Wireless Transmission DIY Kit