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Austria-based SmallRobots has launched a compact encoder board based mostly on the AMS AS5048A sensor — designed to measure absolutely the angle of a close-by magnet with a decision of 0.022°.
“Supreme for small robots and motor management functions, this small sensor board measures the orientation of a close-by magnet (contactless measurement),” SmallRobots explains of its creation. “It makes use of an SPI interface for communications, and might return angle values to 14bit precision — that’s 16384 counts per revolution, or 0.022° levels. It is tiny 21×17mm (round 0.83×0.67″) dimensions imply it can match any undertaking, and could be simply mounted even to tiny motors or actuators utilizing the two.2mm (round 0.087″) holes.”
This compact sensor board provides high-accuracy angle reporting from a close-by magnet. (📷: SmallRobots)
“Current magnetic encoder PCBs I may discover to purchase all the time appeared to have a number of of the next shortcomings — they had been too giant, had inconvenient bits protruding of them, had been super-expensive, required soldering wires to them, did not provide the SPI interface or had poor accuracy/efficiency,” SmallRobots notes. “This meant they did not work in my small robotic designs, or at the least not in the way in which I needed them to. So I made a decision to design my very own encoder board, with none of these issues.”
Designed to work with 3.3V or 5V energy, the compact sensor board tracks the rotation of a diametrically magnetized magnet – considered one of which is included as a part of the bundle. The board connects to an SPI bus through a SH-1mm six-pin connector. “One cable is included,” SmallRobots notes, “and pre-made cables are cheap and simply out there do you have to require extra.”
The board is constructed round an AS5048A sensor, giving it 14-bit decision. (📷: SmallRobots)
A driver is offered to be used with Arduino microcontrollers, whereas help is baked in to the SimpleFOC library — designed to supply simplified Area Oriented Management (FOC) in Arduino initiatives.
The board is now out there on SmallRobots’ Tindie retailer at $15, which features a single sensor PCB, bundled cable, and a small magnet.
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