Overview

The task this week was to make an inteface for the project from last week. Making an interface application for the magnetic field servo display did not seem like a very interesting project, so I decided to make a completely different project for this week. I made a 3D posittion vector detector using 4 hall effect sensors. The idea was to be able to calculate the position of a magnet in free-space based on the readings by each hall effect sensor, and an algorithms that calculates position from that data.

Designing New PCBs

I designed 2 new boards during this week. First I made yet another improvement to my universal ATTiny44 board, where now I reaggranged the positon of the pins on the right side of the board, such that a 2x3 header can easily be connected to the board.

The second board I designed was that on which the 4 sensors were mounted.

Connecting the circuit

Experimening

I reused the python code that was provided on the class website for the purposes of reading data from the sensors. I was not able to achieve the desired results of accurately computing the position of the magnet I held over the board. One possible reason for this is the nonlinearity of the magnetic field around the magnet.