This inductive charging set provides wireless power transfer using a split-transformer design. The transmitter coil is powered with 9–12 V DC, and the receiver coil outputs 3.3 V DC — no direct wire connection between the two halves is needed. Any non-ferrous, non-conductive material (air, wood, plastic, glass, leather, paper) can be placed between the coils.

Key Features

• Wireless Power Transfer – Inductive coupling via air-core transformer
• 3.3 V DC Output – Regulated output from the receiver board
• Up to 500 mA – At 2–3 mm coil separation
• Two-Board Set – Separate transmitter and receiver modules
• Adjustable Output – Feedback resistor divider on the receiver can be modified for different output voltages (advanced users)

Specifications

• Input Voltage – 9–12 V DC (transmitter)
• Output Voltage – 3.3 V DC (receiver)
• Max Output Current – 500 mA (at 2–3 mm separation)
• Quiescent Current – ~70 mA (transmitter, with no receiver present)
• Efficiency – ~40%

Distance vs Current

• 2–3 mm – Up to 500 mA
• ~7 mm – Up to 100–200 mA
• ~12.5 mm – Up to 10 mA

Package Contents

• 1× Transmitter board (input, 9–12 V DC)
• 1× Receiver board (output, 3.3 V DC)

Ideal For

• Wireless charging projects
• Sealed enclosure power delivery
• Wearable electronics
• Prototyping contactless power systems