Hard Drive Persistence of Vision (HDPOV)

Step 11 Mount the Rotational Sensor

Once you have your sensor ready and wired, test its position before you glue it to the hard drive chassis. An oscilloscope is ideal for this, but a volt meter can work just as well. You want to make sure that the sensor position provides a high fidelity signal when its index (slot or magnet) passes by. Once you are happy with its placement, tack it down with some strong glue, making sure to hold in place until the glue sets.