Sep 252016

My Sonicare electric toothbrush recently quit working, so I took it apart and examined the interesting circuitry inside. There’s much more complexity than I expected inside a toothbrush, especially in the mechanism that drives the brush head at 31,000 strokes per minute. Internally, the brush appears to be designed for…
Source: Sonicare toothbrush teardown: microcontroller, H bridge, and inductive charging

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