This electric toothbrush has 5 gears, a low battery prompt, and a driving frequency of 260HZ. You only need to change the duty cycle for different gears. This is also the driving method of ultrasonic electric toothbrushes on the market. Of course, there are cheaper drives than this one, but the effect is very poor. They are directly based on the principle of ordinary DC motor centrifugal hammers. The disadvantage of this board is that it does not have an anti-reverse circuit, charging anti-reverse connection and battery anti-reverse connection.
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