Adafruit
Inductive Charging Set - 3.3V @ 500mA max
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$21.40
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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 receiv...
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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
Tip: Align the coils as parallel and co-axial as possible for best power transfer efficiency.
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
Jargon buster
Plain-language definitions for the technical terms used above.
- Axial
- Axial components have one lead coming out of each end, so they lie flat or span holes on a circuit board or breadboard. This matters when checking whether the resistor will physically fit your prototyping or through-board assembly method.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
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