Arduino Helmholtz Sound Sensor for Hex-A-Bot
Description
This is a control device that can detect a 493 HZ tone to control a motor or other device like the Hex-A-Bot dual drive walking robot. https://www.thingiverse.com/thing:3262487 The Helmholtz resonator is what gives the Arduino type sound sensor the selectivity of sound. A mosfet is used as the output drive. a IRL Z24N will give you a high side drive or a IRL Z44n will give you a low side drive. Both are very common and cost very little. The whistle is tuned to match the Helmholtz enclosure. Video of the device in operation and a build guide can be seen on youtube. https://youtu.be/n24caaZwvwM
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