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Vibration Motor current survey

A project log for Wearable Haptic Sensor

A wearable haptic sensor for gaming

peter-walshPeter Walsh 06/01/2022 at 19:240 Comments

After building the 2nd prototype I took the opportunity to do a survey of motor current. The results are shown below.

Most of the motors run in the 20 mA to 30mA range, depending on voltage, with one outlier.

I *assumed* that the outlier was due to grabbing a pack of cheap reject motors off of eBay, but looking at actual pager motor specs on Mouser shows that most motors are spec'd to run in the 70-90 mA range, depending on motor type.

I have to check another couple of packets of eBay motors to see what the typical current draw is.

This bears on the electronics design, as to whether we can drive the motors directly from the micro GPIO outputs, or will need driver chips.

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