Magnetic Rotary Encoder Project

Figure 1 

The project is based around the AS5040 chip that uses a magnet to provide positional feedback information and 10 bits of resolution per rotation.

A hole with the size of 6.1mm is made to fit the magnet for easy aligning since the chip has 5 different output modes with plenty of diagnostic LEDs. It also includes 6 different mounting holes for ease of use that employs GM3 gear motor mounting holes. The 10 bits of resolution per rotation result to 1024 different positions. The position data from the chip can be provided in many different ways by the AS5040 with each position having its advantages and disadvantages.

A servo motor of unlimited size and rotation can be created when the chip is combined with a motor, a motor driver, and an Arduino. It can also measure the speed of the motor and make it rotate at exactly the desired speed regardless of the load on the motor.

The AS5040 is the most difficult part to solder in the board since it needs to be soldered properly. Along with the AS5040 chip are the LEDs, resistors, ceramic and electrolytic capacitors, IDC header, and other components.

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