SparkFun Magnetic Imaging Tile - 8x8

Visualize the invisible world of magnetism in real-time! The SparkFun Magnetic Imaging Tile utilizes a dense 8x8 grid of 64 high-sensitivity Hall-effect sensors to create a live, visual representation of magnetic fields. This allows you to "see" the behavior of magnets, the flow of current in wires, and the fields generated by electric motors.

While the tile's sensors are highly sensitive, the optimal imaging range is 1cm to 2cm from the surface, making it perfect for detailed analysis of nearby magnetic sources.

• Magnetic Sensor Array: 64x DRV5053VA Hall Effect Sensors (-90mV/mT sensitivity).

• Analog-to-Digital Converter: AD7680 (16-bit, 100kSPS).

• Resolution: With a 3.3V reference, the ADC has a resolution of ~50.3µV per bit. This allows the tile to detect magnetic field changes of approximately 0.56µT (5.6mG) per bit.

High-Speed Performance

The Magnetic Imaging Tile is built for speed, capturing dynamic magnetic fields with exceptional clarity. Frame rates depend heavily on the host controller's processing power. Our open-source software demonstrates a wide performance range:

• With a standard 32-bit microcontroller (like the RedBoard Turbo, STM32 Thing+, or any of our ESP32 and RP2350 boards), you can achieve over 76 FPS via serial and up to 200 FPS with buffering.

• With a high-performance microcontroller (like the ChipKIT™ Max32), you can reach about 2,000 FPS.

The onboard 100kSPS ADC has a theoretical maximum of 1,562 FPS (100,000 samples per second / 64 pixels). For maximum speed, the raw analog signal is exposed. By connecting to a microcontroller with a faster internal ADC, you can bypass the onboard converter and approach the sensor's theoretical limit of ~20,000 FPS.